1

a

in

in

as

At

the

for

ten

are

The

also

and

1975

unit

deep.

make

for

alarm

2-way

2.

alarm

of

Page

control

station.

IF

equipped

may

repeater

networks

panel

bays

housed

additional

and

April

units

Fig. and and

information a

409-300-102

1,

available

be

inches

nondiversity

is

required

4,

preselection needed

.• repeaters,

TR

approximately

An

in

is

amplifier

19

At

add

for

is

equipment.

repeater

Fig.

additional

now

receiver

maximum

switch

unit

alarm

IF

are

to

and

two

Issue

bay

in

and

combining

a

SECTION

bay

order-wire and

an

modulator-preamplifier

modulator-preamplifier

may

each

equipment

TR

3 3

dropping order-wire

panel

of system.

and

bays

installation

measuring required

illustrated

TR

and

wide,

terminal a

system.

while

for

receiver

serve

that

or

an

List

List reissued

TR

as

diversity

J99296G-2

are

J99351E-1

one

terminal radio

illustrated

FM is

can

for

or

following

·

center

inches

outdoor cabinet

bay:

following:

dropping

the

the four

needed

composed

bays

racks

systems

47

multiplex

1975

TL-1

radio

diversity

The

is

is

TR

terminals operation

for

the

section

steel

a

TR

alarm

cabinet, panel

unit

station,

with

system

installations,

with

of

BAY

At

J99296AA-2, J99296AA-2,

while

TL-1

J99351J-1

high,

each

each 9-foot

Receiver-modulator

Channel

networks

system.

the

for

TR

two

certain

Company,

at

for unit system

Equipment Transmitter-receiver unit the The system

•This or The

at

for

system.

RADIO

alarm

complete

(2) either (1) alarm

indoor

packaged

insulated

inches a

(a) and

(a) baseband (b)

terminal

1.02

required. For 63 One outdoor contain station, a 1.03 and an

needed with hops radio 7-foot nondiversity operation alarm up TR diversity

panels

panel

U.S.A.

Telegraph

in

and

3

11

16 14

15 19

18

20 22 25 20 22 24

the

Printed

PAGE

is

DESCRIPTION

system.

Telephone

MICROWAVE

channel.

receiving

auxiliary

order-wire

transmitter

Circuit

bay

Control

Control

radio

an

and

and

TL-1

and

radio American

INTERCON-

(TR)

COMBINING

TRANSMITTER-RECEIVER

Control

TL-1

©

a

microwave

include

Meter

AND

Frequency

a

supply

of

Considerations

PANEL

AND

2-way

. . . .

. .

the

1)

.

unit

to

items

transmitting

(M

(M3)

power

Operation

CONTENTS

includes

single

Circuits

Automatic

Operation

CONTROL

Frequency

Repeller Voltage

a

radio

LIST

bay

DROPPING

Circuit

Circuit

with

PRACTICES

TR Auxiliary

for

the

AND

equipment

transmitter-receiver

ARRANGEMENTS

the

Transmitter Receiver Auxiliary

Meter

Klystron Channel Meter Circuit Receiver

Pane..

.Modi.fications

Standard

basic

The

GENERAL METER BAY REFERENCE SYSTEM NECTIONS

NETWORKS

CHANNEL

B.

receiver

A. B. C.

D. A. D. C.

E.

TCo GENERAL

provides

1.

2. 3. 5. 4.

BELL

AT& 1.01

1.

It Basically,

and equipment.

equipment

(

( in

at

set

and

cuit

sity

ir

60-Hz

c

test

diver

plugged

TL

required

or

terminals,

be

he

115-volt

t

distribution

panel

may

(when

from

ac

where

ent

An

ets

alarm

l

ipm

installations,

View

required

out

operates

equ as

and

power.

equipment

Open

bay

cabinet

panel

r

repeaters).

TR

electrical

convenient

commercial

Order-wire Multiplex

switch outdoo

The

other

Cabinet-Door

dropping

(d)

(e)

1.04

provides

or

charger

Transmitter-Receiver

units

and

unit

amplifier

panel

1-J99262A

batteries

monitoring

baseband

Fig.

and

baseband

and

control

IF

storage

and

supply

6-volt

Meter

Receiver

Transmitter

Transmitter

409-300-102

Power

Four

2

(4)

(5)

(6)

(3)

(b) (c)

SECTION

Page ,

8

of

er

3

is (a) s.

an In

by of ion

on

ve

the

102

by

the

1J-1

- one

the

r

two .

feed

ref

ha

within

e

35

If

signal

Fig.

sect

h signal

Page

300 through

by

run

from - coupled

available

(b),

control J99

eit

fan

network

RF

carried

s

this J99296AA With

5).

temperature

the

409

baseband

ignals fed

polarization

1.06

1.23, frequencies

1.14. are

channels the

is s

transition

in

maximum

circular the

rectangular rectangular

connect

separates

grouped

a

unit

with

with the to

a

waveguides.

A

are unit-paragraph

to

to

received (Fig. , RF

and by

and

to

with

the

(b)

waveguide

radio

now

is

complex

signal

under

SECTION

in

)

refer

whether ventilating combining

through

IF

,

,

3 unit

modulator-preamplifier

or

network

polarized

used 4

described round-to-rectangular

six bays.

.

A

quipped

main The

g

(a), equipped

baseband

4) This

i

a

e and

1.11

antenna

signal circular interior cabinet

to

ISS

baseband receivers

(F and

upon 1.15.

· TR

is

polarizations.

7

rectangular

is

the

also

station

or

polarization waveguide

transmitted

and operates

the with

and RF

on

unit-paragraph the

receiver

i

(Fig. to

transmitted one

amplifier channels

and and

the

and

into

receiver

from

two

IF

are

testing.

to separation

6 IF

The

to

system 1.08 IF

radio

dropping keep

antenna. are

horizontally

or single

arizations.

The

receiver

l

from

Operat

to the cabinet

receiver

them

antenna

a excessively.

network

Fig.

path

depending three

po

equipped

receiver

J99296F incoming TL-1

runs

run.

receivers

and

the

,

one

a assembly

of

is

connect

The •

modulator-preamplifier

.

channel

through

the

• two If

in The

follows: unit-paragraph

1.21, J99262G networks

FM 9 J99296G adjacent

J99351E-1

The

rising

transmitters

3 to

contain

parabolic

outdoor

Receiver

maintenance

by

or

as

circular

case launches

shorter

1.06

a

(a)

(b)

(c)

and thermostat

it

.

07

.

for the a from 1.05

A channel List

1.06 receiver 1.10.

to

are

1

of may

one the separation

transition contains polarizations, vertically

and the used waveguide. polarizations, waveguide three the waveguide

to microwave

These

,

Mounted

-

Rack

Receiver

-

Transmitter

Bay

7-Foot

2-J99262B

Fig. SECTION 409~300-102

( CHANNEL DROPPING NETWORK

,.!.~~-;BP:-;F;;i:IL::iiTE;Rf----~~----iISOLATOR 1------(~-~,...__------1POLARIZER 1------1---!

TO RECEIVER TO OPPOSITELY ( POLARIZED ~r r~TRANSMITTERS AND ~ ~ RECEIVERS I I TO TRANSMITTERS 18-0B VOLTAGE GAIN

(

+29 OB +28 DB +2 DB -1 OB +49 DB (25 MV/MHZl

AGC VOLTAGE DC

fRF t70 MHZ

DC AFC

NORMAL / 40-DB FADE TYPICAL POWER LEVELS DBM/ DBM ( Fig. 3-J99262G Receiver-Block Diagram

1.08 In a particular bay, a channel dropping The converter portion consists of a waveguide network selects its designated RF channel hybrid which mounts the input waveguide section from the other channels and passes it on to its and a waveguide attenuator through which the BO receiver. The remaining RF channels pass through signal is introduced. The output branches contain the network. At the end of the waveguide run, matched crystal diodes. A eoaxial jack is provided selection is not required since only one RF channel at the output of the preamplifier for a connection is present, the others having been dropped. It is, to the IF and baseband unit. Coaxial jacks are therefore, applied directly to its receiver. also provided for connections to the receiver control unit to permit reading the modulator crystal currents 1.09 As shown in Fig. 3, an isolator is located and for the power supply connection to the between the channel dropping and channel preamplifier. The complete receiver modulator­ combining networks. Its function is to prevent preamplifier channel assembly is shown in Fig. 4. beat-oscillator leakage from passing through the This assembly is coded as the J99296F polarization separation network and interfering with modulator-preamplifier channel assembly and must other receivers. The isolator, in general, is installed be tested and adjusted as a complete unit. The only when four or more bays operate off one List 1 unit is rated "Manufacture Discontinue," antenna. (MD).

1.10 The selected signal enters the receiver 1.11 When a receiver is equipped with the through a bandpass image rejection filter redesigned modulator-preamplifier, the channel and a waveguide tuner to a balanced diode modulator. assembly consists of a bandpass filter, waveguide The modulator-preamplifier contains a balanced ferrite isolator, and a J99296AA, List 3 crystal converter and a transistor preamplifier. modulator-preamplifier (Fig. 5). The isolator replaces

Page 4 .

5

is

of

its

With

input

ator

Page

and

number

ill

incoming

incoming

l

output

1307-type

the

409-300-102

Filter osc

intermediate

the

to the

IF

the

an

channe

1307

beat and

The than

circuitry,

e

the

SECTION

and

Th directly

4,

codes,

lower

AFC

produce numbers,

upon

MHz.

l

ISS

or

to

Modulator-Preamplifier

ected

70

the

Isolator

3

nn

at

of

network

9A

List

co channe

higher

depending

is

preamplifier. be

oscillator frequencies.

the

control

centered

BO

may sts

beat

1402-type

li

Associated

the

and A

the

and

low-noise

l frequency

5-J99296AA,

modulator

a

gna

i

Fig.

frequency the from of under frequency s

filter Table signal

a

at

is The

which

crystal output

monitor

input

Channel

amplifier

A

the

IF

tuner.

mixer,

or with

balanced

bridged

first

l

a

a

and

Modulator-Preamplifier

signa

preamplifier.

waveguide

t 1

is

converter, RF

contains

L

modulator-preamplifier

providing

modulator

With

Modulator-Preamplifier

transistor

crystal

the

added

a

incoming

of

J99296AA

and

the

been

Assembly

balanced

The

has

4-J99296F

frequency-sensitive

interface

Fig. modulator-preamplifier the converter

1.12 the stage. jack

combines $ECTIO._ .:4()9-300-192

TABLEA

NORMALFREQUENCY PLAN

FREQUENCY 1307-TVPE FILTER CHANNEL NUMBER AND BEAT SIGN.AL 1402-TVPE NElWORK OSCILLATOR CODES OLD NEW GHz

1 A p B 10.755 10.825 1 B J T 11.405 11.335 2 A p G 10.955 11.025 2 B J AD 11.685 11.615 ( 3 A p H 10.995 11.065 3 B J AC 11.645 11.575 4 A p A 10.715 10.785 4 B J u 11.445 . 11.375

5 A p M 11.155 11.085 5 B J R 11.325 11.255 6 A p E 10.875 10.805 6 B J AB 11.605 11.535

7 A p F 10.915 10.845 7 B J AA 11.565 11.495 ( 8 A p L 11.115 11.045 8 B J s 11.365 11.295

9 A p K 11.075 11.145 9 B J N 11.245 11.315 10 A p c 10.795 10.865 10 B J y 11.525 11.595

11 A p D 10.835 10.905 11 B J w 11.485 11.555 12 A p J 11.035 11.105 12 B J p 11.283 11.355

1.13 The staggered frequency plan is intended 1.14 The output of the beat oscillator is fed into primarily for use on converging or crossing the E-plane junction at the relatively high routes in congested areas. It is not recommended level of approximately 0 dBm which is controlled to be used on the same antenna systems as the by the 28A waveguide attenuator. The incoming normal frequency plan. If it is necessary to do carrier signal splits at the junction and is impressed so, very careful consideration must be given to on diodes CR1 and CR2 in opposite phase. Since interference problems caused by adjacent channels the .diodes are mounted in the waveguide with and beat oscillator frequencies. The added frequencies opposite polarities, they will conduct simultaneously, are spaced 20 MHz from and midway between the and a balanced switching action will be produced existing channels. The frequencies start at 10.735 within the hybrid. Because of the symmetry of · GHz and extend to 11.665 GHz as shown in Table B. the hybrid, none of the BO output will appear at

Page 6 7

IF

the

the

two

in the

is

Page

obtained

the

to

amplifier

introduce

is multistage

409-300-102

of

a

of

in

BEAT

which Unit

11.315 10.845 11.595 11.045 11.085 11.555 10.805 distortion 11.355

11.105 11.375

10.825 11.515

11.065 11.615 11.275 10.865 11.025

10.885 11.295 11.575 directly 11.535 11.335 10.785 11.125

frequency

sections

OSCILLATOR

SECTION

outputs

MHz

4,

composed

GHz

amplified phase

the 70

ISS

These

Baseband

FREQUENCY

of

connected

and

first

C.

is

is

and

difference

phase

IF

amplifier

SIGNAL

11.385 10.775 in

10.975 11.665 11.015

10.735 11.625 and 11.425 11.175 11.305 10.895 11.585

10.935 11.545 11.135 11.345 11.095 11.225 10.815 11.505

10.855 11.465 11.055 11.265

The

signal

signal

frequency

B,

amplitude

IF

A.,

Receiver

This

PLAN

wideband The

little

paralleling

B FILTER

intermediate modulator. by diodes. 1.15

preamplifier. J99262G very

sections

NETWORK

BA AF AL

BH AM AS BG AE

AND AJ BB AK AW

BF BE AY AP AR AG AT

BD BC AH AU AN

CODES

FREQUENCY

a

TABLE

in

of

the the

the

1307-TVPE two

1402-TVPE

low

at

are

result,

of

signals

the

a

too

varying

frequencies

as

STAGGERED

provided combinations

These

signal or

combinations,

are

BO

between

E E operation D and, D

E D E E

E D

E E E

E

NEW D E

E D

The

and

frequencies

CR2.

hybrid,

which

the

and possible

phase

frequency

frequency

on

signal the

image

in

NUMBER

a

the

of

CRl

frequency

of

diodes

matched.

other

c c

D D

c

D D D c c

D c D D

c D c D c D c D OLD D D D

c

c and

D D D

all

effect

BO

high

the

port the

divides

Of

CHANNEL

on

any

the

too

All

containing

perfectly

1 2 1 2 at input

3 3 4 5 4 at 5

6 6 7 7 8 9 8 9

combinations

10

10 11 11 12 12

difference

have

junction

are

arms

to

the

produced. signal

either

impressed

diodes the H-plane hybrid impedance are frequency are significance. only

are level

( ( ( sr;cno._..499~-102 signal because their passband is very broad in activated by monitoring the de biasing voltage of comparison to that of the overall IF amplifier. the AGC amplifier which is proportional to the RF Since the amplifier is fully transistorized, automatic input signal. gain control (AGC) is performed with two variolossers located between amplifiers A, B, and C. These 1.20 The baseband signal at the output jack now devices are made up of biased diodes and present passes through the diversity switch and/ or an insertion loss that varies with the received the order-wire and alarm and is then applied to signal level. Their action causes the IF signal at either multiplex equipment or a radio transmitter. the output of the second variolosser to vary only 1 dB over a 40-dB range of RF input power. J99296G IF and Baseband Unit 1.16 Complete IF bandpass shaping occurs in the IF filter following amplifier section C. This 1.21 •The IF and baseband unit (J99296G), Fig. 6 filter is also designed to equalize the small and 7, is a transistorized plug-in component transmission deviations existing in the amplifier. of the RF panel and provides an unbalanced baseband ( The IF signal is boosted an additional 49 dB in output signal from an unbalanced 70-MHz IF input amplifier section D which drives the limiter and signal. It includes the following. the AGC circuits. For AGC purposes, a portion of the IF signal is diode detected, producing direct (a) Amplifiers to raise the level of the 70-MHz current which is amplified, and used to control frequency-modulated IF signal supplied to the bias on the variolosser diodes. the unit from the modulator-preamplifier.

1.17 After limiting, the IF signal is detected in (b) Variolossers which serve as part of the a wideband frequency discriminator. The AGC circuit to hold the IF output approximately recovered baseband signal is then amplified in a constant with fading of the input signal. baseband amplifier and brought out to a 75-ohm jack for application to multiplex terminal or radio (c) An IF bandpass filter to suppress unwanted transmitting equipment. frequency components outside the 60- to ( 80-MHz IF band. 1.18 To compensate for frequency drifts in the transmitting and receiving klystrons, the (d) A limiter to remove amplitude modulation frequency of the BO is controlled automatically, from the frequency-modulated IF signal thereby keeping the IF signal centered at 70 MHz. before it is supplied to the discriminator. A de input signal for the automatic frequency control (AFC) is derived from the discriminator (e) A discriminator to recover the baseband output. Polarized direct current is present at this information from the frequency-modulated point when the IF is other than 70 MHz. A de IF signal. signal at this point passes through a transistorized de amplifier, is amplified in a magnetic amplifier, (f) A baseband amplifier to raise the signal to and then applied to the BO repeller to correct its the level required for the connecting circuits. frequency. The frequency will change in the direction that tends to null the discriminator de output and therefore a fixed 70 MHz is maintained. (g) An AFC de amplifier to transmit the In addition to AFC, the BO klystron is differential output of the discriminator to frequency-stabilized by a temperature control system the magnetic amplifier located on the receiver that is described in 1.28. control unit. The output of the magnetic amplifier is applied to the BO repeller in a direction to 1.19 A squelch circuit is incorporated in the maintain a constant 70-MHz intermediate frequency. receiver. This circuit cuts off the baseband amplifier when the RF carrier is reduced to or beyond a specific value by a fade or equipment (h) An AGC detector and amplifier which, in failure. Excess noise is thus stopped before it conjunction with the variolossers listed above, can enter multiplex equipment where it could mix serve to hold the limiter input approximately with good working circuits. The squelch circuit is constant.

Page 8 l

a

in

9

70

of

for of

the

the

for

the

(-)

the

than

is

panel

front

of

adjust

means means signa

on

means

means

control limiter

means

Page

respect

to

squelch

a

adjusted

a a

position.

and received

and

to front

replacing

removing

used

the

provide

means

supplying

is

bottom the

other the the adjusted

correspond

only

409-300-102

This

on

signal

+)

a

by

be

with

the

(

on

of

and

output

voltage

AGC

be to

used

includes

and

the

volts

proper

IF

output

jacks provide

on

power. provides

is

level.

6

may

provides

jack

follows.

basis

on

level.

voltage

may

jacks

unit

provides the

unit

the

point

provides

SECTION meter

provided

(-)

means

as

located

it

provides

jacks

(-)

units,

monitoring

input depending

4,

the

modulator-preamplifer

output

two

baseband

top,

located

input

AGC

the

control

the

until

and

differential

bottom jack

control of

(-)

adjustment,

when

ISS

located

jacks jack,

L4A

baseband

volt the

the

by the

AGC

the

the

control,

squelch

+)

control the

1

the limiter

( jack,

signal the

and baseband

circuits.

and

back

and

zero OUT

GAIN However,

the

out-of-service

OUT the jack,

70-MHz indirectly to

near

ZERO

the

IN

+)

from approximately

the IN

(

L4

amplifier. provides

to

0 the and

of near

an required,

GAIN

IN

MON

is

for

provided between

IF circuits.

unit

on

making

IF

LIM

AFC on as

RCVR

RCVR IF

LIM

IF

RCVR adjusting

IF

AGC

baseband

connecting

unit,

established. monitoring

unit

from signal specific

factory.

the

the

connecting

strength.

circuit

is

level.

a

upplying

adjustments

The adjusting

The for

The voltage the The

The unit adjusting J99296G, unit,

for to The field means

The for s

The IF

means the The

of The the The

the

ground

the

located

(a)

(b)

AFC MHz.

(c) (d) with

for at is the the the

point (e) to

(f) input

(g) the to

difference ranges The signal (h) unit the (i) connecting for

(j)

1.22

a

or

the

beat

AGC

AFC

switch

correct

the

the

baseband the

prevented

effectively

provides

under

carrier

of

Unit

is is

the

Simultaneously,

diversity

With

allow

of

loop

which

the

control

fade.

and

channel

approximately

Baseband of

oscillator

frequency

output

control

circuit

its

..

under

and

operate

depth

beat

new the

to

frequency.

control

IF

to

signal.

a

adjacent

drive

the

• circuit

BB

at

mute

an

.J.L

frequency

&

return

specified

RCVR

voltage

to

remove carrier

IF

of a

S097159·02

UM•v

J99296G·2l4

to

operating

at

to

6-J99296G

diversity

disabled,

squelch

locking

control

A

A circuit

automatic

Fig.

(i)

circuit.

amplifier (j) the opened oscillator nominal

circuit from influence extraneous ·

....

(

(

(

(',

DIV

to

OUT RCVR

the

the

TO

SWITCH

level

input

signal

signal

of

the

baseband

the

from

IF

modulation

supplied

88 connecting

of

output

AMPL

the

level

is

IF

the

raises

it

filter

the

fading

the

5

for

frequency-modulated

recovers

AMPL

which

UNIT

DISC

107

Diagram

before

with

raise

1----+--+--+-7

RCVR

hold

unit.

the

AFC

IF/BB

the

which

removes amplitude

required

signal

which

from

which

amplifier

constant

IF

LIM

frequency-modulated

which

Unit-Block

level

through

the

(OOBM)

the

discriminator baseband

limiter

70-MHz essentially

Amplifiers Variolossers A A to A information from

discriminator.

MON

Baseband

signal.

IF

AMPL

OUTPUT

supplied

(b) modulator-preamplifier signal.

(a)

(d) circuits. (c) the IF

(e)

and

IF

AND ATT

BPF

as

IF

the for

The

J99296G

signal.

the

circuits.

Receiver

IF

to together,

individual

amplifier

packaged

With

AMPL

INPUT

replace

supplied

arrangement

FM

the

repeater IF

to

filter

three

and

IF

which,

(J99296G).

of radio.

from

Equipped

)

connecting

filter,

an

receiver

(J99351J)

following.

1075A

unit

modulator-preamplifier

units

J99351J-1

TD-2

FM

the

the

a

the

the amplified

drive

CORD

to

PATCH

1075A

and

to

arrangement and

comprised

is

to

receiver a

information

(

is

7-Receiver

receiver

from

or

9)

baseband

of

includes

FM

through

output

Fig.

signal

plug-in

FM

and

amplifier

Amplifier

and

a

signal

8

and

baseband

connections

IF

IF

and

IF

as

409·300-1i»2

ATT FM

WAVEGUIDE

28A

the

purposes

supplied

(Fig.

The

consisting

10

is baseband

1402

arrangement

unbalanced

MOD

test

possible

TO

NETWORK

.

SECTION

1.23

together

J99351E-1 recover receiver

units unit The Arrangement an 70-MHz The Page amplifier (J99351E), to

a

IF

70

for 11 of

for for

the

the

FM

point 100

unit.

is

output

the

of

setting means to

means

signal which means

receiver

coaxial

already

and 11-GHz

gain

Page

limiter this of

level.

for

baseband terminated means

a

the means

means

the the

correspond

409-300-102

FM at

a

the

a

source.

signal

a

the transistorized a

plug

receiver level.

signal

produces

to

70-MHz

voltage

in

to

IF

the

output signal

means

provided voltage

level

the

baseband

the

the amplifier,

a

a

of

provide

input

provides

normally accept 3-stage

the of 10)

point

the

SECTION

provides

to . provides

provides

IF

a

approximately

The

input the

circuits.

also

signal

IF

is

circuit

provides provides to

4,

is

applied

unbalanced

jack baseband

with

is IF of

of

(Fig.

jack

input

jack

differential

ISS jack

when

.•

and provides

control

filter,

IN unit.

jack

ohms).

the

control

squelch

level

patching measuring

the

the

IN

cord

connectors

level

level control

the

OUT

OUT 75-ohm

amplifier

(75 panel

or zero

dBm

designed for

connecting prescribed the 70-MHz

A

a

into

ZERO

control

0

MON

a

to

RCVR

GAIN is the

Operation RF (J99351J)

with output

the

plug

circuits.

amplifier

IF It

RCVR unit for

SQCH

transmitting

from RCVR RCVR power

AGC

IF BB the AFC the to

supplying

adjusting

baseband

IF

specific

units.

a

in

to

cords circuit

469A

a

the

monitoring

The

the The

The adjusting

connection The dBm The for

The setting

The for

The frequency-modulated

a feedback amplifier The

the at

nominally

signal

Receiver

Transmitter

interconnecting

unit

unit. -7

(c) by of is

(d)

with

(e)

(a) amplifier

(b)

(c) connecting supplied MHz. (d)

AFC

FM

Cords

Coaxial for

receiver adapts 1.25 provided B.

1.26 band milliwatts. input

a

it

or or

is as to

the

the

the

the

the

the

the the

the

for

beat

input

cords

of Jl which Jl

located

of

repeller

located

units.

when

adjacent

jack

from filter

converts

diversity an

jacks

the

from from amplifier

amplifier

is

an

connection

a

BO

signal.

of means

compares

IF

either

rear IF

arrangement either

and

intermediate output

of

transmits

and

activates

monitors

This

squelches

jack

the 1075A

which

the

receiver

the amplifier

the

derived

amplifier

the

associated

unit.

gain

The

coaxial

to

of

and

carrier

of

the

prevents operate This

de

a

FM

on

connection

connection control which

receiver

unit.

which the

the and

70-MHz of

constant. voltage,

to

amplifier,

reached, designated of

input

unit.

and

and designated

FM

voltage

enclosure.

the

unit.

amplifier

output

applied

under sets is

magnetic

provides which

output,

the

adjustments,

coaxial

input coaxial

provides

and

is

located

IF AGC of

jack,

output

panel

(1075A) extraneous jack,

to

filter

amplifier

the

and

is

AGC

output amplifier control the

the jack constant

the level

amplifier

jack

or

the

relay

the

reference amplifier

to

detector locking

de

the

a rear

cords,

limiter

filter

IN

filter

of

input

jack output

IF

(J9935JE)

of

amplifier amplifier

OUT

circuits

amplifier

the AGC

the

from the

IF

IF AFC IF

AGC

IF polarity

fixed carrier IF

the receiver IF

provides

squelch

patching provides

on diversity

of rear

This

squelch

a

the

enclosure.

An differential

hold output An A

Filter

the A

for The

includes The

The input

J2 The

the J2,

connecting maintain The

for The

the

(f) discriminator on magnetic

to frequency.

(g) (h) with predetermined Amplifier AFC oscillator baseband

channel

(i) from switch. (j)

(a) modulator-preamplifier on

(b) output

unit. filter

(a)

located the (b)

1.24

1075A

follows.

IF

( (

(

\. SECTION 409-300-102

( 1075A FILTER 840881700 CABLE I TL-21 \ OR 840881726 CABLE ITM-11

IF AMPLIFIER UNIT IJ99351E1

Fig. 8-IF Amplifier and FM Receiver A rrangement Consisting of 1075 A Filter, J99351 E IF Amplifie r Unit, J99351J FM Receiver, and Associated Cables approximately 28 dB and a bandwidth which is is properly adjusted. The second coupler of DC 1 essentially flat from 200 Hz to 6 MHz. Here the also contains an RF signal that is 20 dB down from baseband signal is amplified with a minimum of that in the through arm. This signal is converted distortion and applied to the transmitting klystron in DET 1 to direct current which gives a power repeller through a short length of wire. The varying output indication on meter M3. amplified baseband signal linearly modulates the klystron-generated frequency. This FM signal is 1.27 At the combining network, the transmitter fed through a 1B isolator which has a forward loss signal is inserted in the main waveguide line of about 1 dB. The reverse loss of the isolator is and propagated toward the antenna along with the approximately 55 dB and it, therefore, minimizes channels from other transmitters. Horizontally klystron frequency pulling caused by antenna and and vertically polarized signals are fed to the waveguide reflections. The RF signal then passes circular antenna waveguide feed through the through a double directional coupler and on to the polarization combining network. The composite channel combining network. The two couplers are signal is then propagated to the next station by used to provide a frequency and power output the antenna. indication. In the first coupler, the RF signal, 20 dB down from that in the through arm, is passed 1.28 The transmitting and receiving klystrons are through AT2 and a very narrow bandpass filter stabilized against frequency drift by maintaining tuned to the assigned transmitter frequency. The them at a constant temperature. This is performed attenuator and filter, in conjunction with a meter by means of a vapor-phase cooling system. This on the meter and control panel, are used in adjusting system is composed of a small boiler located the transmitter frequency and deviation. The RF between the two klystrons, a condensing system, signal in this leg is converted to direct current in a tube that interconnects a boiler and condenser, DET 2, a diode detector, and then applied to M1 and a rubber bladder. A fluorochemical liquid, which gives a peak indication when the frequency having a boiling temperature of approximately

Page 12

s s -

Diagram Diagram w w

I I Filter-Block

1075A 1075A

and and Receiver, Receiver,

FM FM Unit, Unit, J9935U J9935U

Amplifier Amplifier IF IF

J99351E J99351E With With

Equipped Equipped 9-Receiver 9-Receiver Fig. Fig.

CD CD

Ia Ia 'l 'l

z z

6 6 KLYSTRON KLYSTRON 80 80

......

I I

n n "' "' m m

I I SWITCH SWITCH

!" !" AGC AGC

DIVERSITY DIVERSITY TO TO "' "'

1------,------+------'-'-< 1------,------+------'-'-<

DIVERSITY DIVERSITY

iii iii

SQUELCH SQUELCH

Af"C Af"C TO TO AMPL AMPL

SQUELCH SQUELCH

AMPL AMPL AMPL AMPL

Af"C Af"C AGC AGC

f"ILTER) f"ILTER)

AMPL AMPL

OUT OUT RCVR RCVR DISCRIMINATOR DISCRIMINATOR

_, _, J;;;2 J;;;2 LIMITER LIMITER

' ' AMPL AMPL If" If" B.P. B.P. (IF" (IF" BASEBAND BASEBAND

F"ILTER F"ILTER 1075A 1075A CORD CORD

PATCH PATCH

J99351J J99351J J99351E J99351E

RECEIVER RECEIVER FM FM AMPLIF"IER AMPLIF"IER If" If"

DBM) DBM) (0 (0

MON MON

If" If"

ISOLATOR ISOLATOR

9A 9A

NETWORK NETWORK NETWORK NETWORK

1402 1402 TO TO 1402 1402 TO TO

--

1 1

\__ \__

--

( (

~-

r r ,~- SECTION 409-300-102

TO TRANSMITTERS AND RECEIVERS ON+------, OPPOSITE 'POLARIZATION

(

-14 DBM (-IS. 5 DBVI FOR ±4MC DEVIATION I ( CHANNEL COMBINING NETWORKS FROM I TRAN.S- _.,.__.-oo~ MITTERS

DC TO RECEIVERS

FREQUENCY ( AND DEVIATION POWER MONITOR 'f MONITOR

Ml M3

Fig. 10-Transmitter-Biock Diagram

214~F,is contained within the system. In that selects the better channel to deliver the baseband boiler, heat energy generated in the klystrons boils output signal, as illustrated in Fig. 11. Baseband and vaporizes the fluorochemical. The vapor travels switching occurs in the K4 relay controlled by the through the tube up to the condenser where it logic circuit which secures information on the quality cools, condenses, and then runs back to the boiler of the radio channels from a fade comparator and by gravity feed. Converting the fluorochemical two pilot monitors. The pilot monitors are bridged from the liquid to vapor state occurs at constant across the receiver outputs and detect the presence temperature and continuously draws heat from and absence of a 2600-Hz continuity tone. This the. klystrons, thereby stabilizing the klystron tone is applied to the radio at a near-end terminal t;em,perature. Temperature variations in the TR for alarm signaling purposes and passes through bay environment cause minimum temperature change every radio bay and station in a radio system. to the klystrons because an appropriate change in Absence of this tone on one channel of a diversity the rate of vaporization and condensation will then pair indicates a failure in that channel, and the take place. switching circuit selects the baseband signal from the good channel. When pilot tones are received C. Auxiliary Circuits by both pilot monitors, the fade comparator determines which receiver supplies the baseband. 1.29 The diversity switch unit continually monitors Transmission quality is compared here by finding the two channels of a diversity pair and which channel has a stronger RF input signal and,

Page 14 is is

In

On

15

the

one

GHz.

total)

MHz.

in

half

40-MHz

11-GHz

band

stations

any

12).

between

channels repeater

channels 40

Page

alternate

receivers (12

11.7

separation

separation

minimum a

at

of

polarization. 409-300-102

the

with

a

the

two

lower

of

into and

(Fig.

These

transmit

repeater

frequencies.

for

the

use same

uses the

40-MHz channels 10.7

frequency

160-MHz

instead

sides

separation

work

and

band

SECTION

used.

in

the

channels

the

4,

frequencies

paths

of

when

are

MHz

half 24

giving

alternate

of

system

between

ISS

between

Considerations

90

alternate

opposite

adequate into midchannel

radio

is

resulting

half

upper

frequency

requirement

on

Diagram

radio

band transmitters

receiving channels

hop,

ADD

RELAY

separation

the polarized,

the DROP

THRU

the

divided

separation

and

transmitting

provide Frequency

upper

in

frequencies, MX

TL-1

AND

between of

adjacent Since midband

CIRCUITS

MX

is

WAND

channels, to

To

system channels the

adjacent

to

0

the

80-MHz

frequency The

12

The

half

same

fulfills

band

one

Channel

receive

Circuits-Block

alternately

the

1.32

D.

separation 1.33 This any having

are between

between station. transmitting allocated station, receiving. of will addition, lower This adjacent

I

I I

I I I I I I

I I I I I

I I I I I I

I I I

-~

Auxiliary

a a

at

is

11,

the

the

the

two

in

made

to in

second in

portion

selected

Fig.

a

combine.

the

assure

complete is

crossband

fed

broadband

______

in

utilized. of

transmitted

to

outputs

multiplex

nondiversity

to

to

or

arrangements

is

systems

K4)

and

are

The

In

the operating

pad

2-way

comparison

operating

shown channel

output

two

around

alarm

LOGIC

six

CIRCUIT

inband

s~~H_U~T-

pad. filters

As

the applied

(CONTROLS

from

TM-1 signals split

the voice-frequency

and

for

The

TL-1,

at 11-Transmitter-Receiver

better

is

transmitter

voltage

turned of circuits.

coordinated

the

the split

the

is

alarm the

a The ~v_:_R~T2:_

Fig.

one in

of

and

AGC

of

been

system.

and separated split-apart

signal

available

order-wire

alarm spectrum.

only

an

reappears which

one radio

noise.

band

has are

are

of

with through

COMPARATOR

and

same

the

combination

comparator.

design

but

since

filter less

diversity

signal

______

operation.

the

basis

,------l

band,

I I baseband

L

Order-wire over

11-GHz

fade The

signals

station

composite

channels

used,

AGC

AGC

the

the

the

1.30 therefore, on in

these of each order-wire split-apart baseband The 1.31 transmitters systems,

are terminated 6-GHz crossband convenient diversity

TL-1

( ( \. (

( (.

CHANNEL

CHANNEL

CHANNEL

CHANNEL

Diagram

DESIGNATIONS. NEW DESIGNATIONS.

DESIGNATIONS.

DESIGNATIONS.

J-

P-NEW

B-OLD

A-OLD

!.

2.

3.

NOTES:

Plan-Block

Frequency

REGULAR

11-GH:r:

12-The

Fig.

J

2, in

in

in (6 in

at

11,

for·

the

are the

hop

any and

half

even

hops

1,

north

group group

which

in

12B/J.

permit

of

10,

number

AlP;

group

8

(ignoring

direction

numerical

to

third

diversity

band

9,

12A/P

beginning

have

means

overreach

minimum

designation

lower

group.

in plan

will or

polarization

channels

generalized

established.

designation).

Channels

a combined

and

to illustrated

basic

--~

adjacent of

between one

1B/J

12

Channels signal

the

first

west

7,

the

every

letter

protection

in

its

on

This

group

assignment

designated

40)

in

(new or

been

6,

a

these with

channels

its

provides

transmitting

installed

the

1A/P

The

panel,

designated

P

13).

+

and

frequency

5,

subassembly

switching

are

effects channel

numerical

in

has

and

a

shifted

and

retains

PANEL

plan.

that

baseband

south

numbers.

designation)

are

numbered

(90

addition,

within

B/J;

channel

is

is

(Fig.

total

band

changes

group

channels

control

the growth

directional

plan

a

In

polarized.

2

are

(old

hop

odd

growth.

transmitting

15,

a diversity

panel

channels single

or

adverse

implement

maximum)

MHz but definite

12

the group; numbered

assigned

B or

receiving

a

and

and

and

service.

a

contained

(6

to

1

CONTROL

of

last channel

switching)

channels

the

and are

have

the

130 hops.

direction, are

of

explains

and

transmitting

plan,

within

system

group;

frequency

are

specific

the

with

14

system,

of

group

allocation

meter

AND two

half

oppositely

channels

a

a 4

order

diversity

east

in

plan,

this

reversed.

409-300-102

the

channel

specific

designation)

total

is

In 12 Fig.

Channels requirements, or on are

diversity Channels The order The All

opposite

·In

adjacent

minimize

16

a

and

designation)

channels

this

following

upper

METER

antenna.

the

(old

maximum) (e) maintenance

interruption

with the on numbers. and to this of 3, (d) through interference. switching (b) (c) (a) second

1.34

SECTION

For separation frequency Page one A of designated 2.01 transmitting The transmitter-receiver accordance dictates the 2.

The

(new 17

Page

•

• • •

8 • • • • • • • • • • •

• •

•

• • •

• •

• • •

• • •

• • •

409,..300-102

7 • • • •

• • • •

•

• •

• •· •

•

•

• • •

• • • • • •

• • •

6

•

• • • •

•

• • •

• • •

•

•

• • •

•

•

• • • • •

PLAN

5 •

•

• • • STAGE •

•

• • •

•

• •

• •

• • SECTION • • •

4

•

•

4, • • •

Application-Chart •

• •

•

•

• •

•

•

• GROWTH •

3

GROWTH

ISS •

•

•

•

•

•

•

•

• •

• •

2

• •

• •

•

•

• •

Diversity

I

PREFERRED

•

•

.

• •

TM-1

288

OLD. 28A lA

278

27A

258

26B 25A 17A

26A ISA 24A 23A 238

248

188 178 16A 22A 168 21A 218

15A 228 158

13A

14A 128

I liB

138

12A

148

Crossband

CHANNEL

27U NEW 28C

27C

25C 28U

DESIGNATION 26C 26U 25U 24U 21U

IBU 17C

ISC 24C 21C

23U

23C 17U

22U 15U

16U 15C

16C 22C 14C

14U

13C

12U IIU

IIC

13U 12C

for

Plan

Grawth

Channel

• • • • • • 6 • •

•

•

• •

•

• • • • • •

• •

• • •

5

• • • • • •

• • •

• • •

• •

• •

• •

• •

PLAN

4 • •

•

• • •

•

•

STAGE

• • •

• • •

•

• Preferred

3

• • • •

•

•

•

GROWTH

• • •

•

•

EQUIPPED

·~. • •

GROWTH

• •

•

• •

•

I

•

•

•

•

PREFERRED

CHANNEL

TM-1/11-GHz

?B

3B

IB

6B

7B

4B

58

OLD

88 5A

liB

98

lOB

8A lA 128 3A

7A

2A 6A

4A

IIA

12A

lOA

•

11-GHZ

.

CHANNEL

IJ

2J

3J 7J

IOJ 6J

4J

5P IIJ 5J SJ

DESIGNATION 12J 9J NEW

3P

8P

9P 9A 12P

2P IP

7P lOP liP

6P

4P

DENOTES

13-The

•

Fig.

( ( ( ( Panel

J2+ L

~

ACT

80

Control

XMTR

RF

PWR

OR

)

FUSE

FIL

-400

-CATHj

-oFF

and

/

"

PANEl

\

CATH

-200

J

REMOVING

\

I

FREO

KlYSTRON

Meter

AGC

ON

OFF

BAT

AFC

,_--......

INSTALLING

,.~'\

-2o

BEFORE

CR2

REMOVE

Cl

/

'

~

(

\:Fe-/

I

11-

TST

NOR

BO

LIN

RPLR

14-J99262K

.

Fig

.

in

of

as

C.

es,

the

S6,

the

the

and

the

and

two this

and

with

used

R31,

CR2

volts

-400

front

major

These

which

shown

in

to

ltag

are

circuit

voltage

supply,

actually

deep.

M3

vo

is switching

adjusting

Table

the described

simplified

panels servicing.

and

the is

assembled

within

transmitter

meter

switch

-400

The

deviation.

the

y

resistors

in

adjustments R37, l

by

.

in

output

meters

voltages

are through

with panel

addition,

approximately and

for

are

and

of

purposes,

the

on the

power.

inches

beginning

and below

panel

CRl

20-volt

n

from

with

R28, R29,

and

supp

amplifier obtained

3

are

and

control

IF)

•I

this

voltmeter,

power

ground

which

of

made

is

shown

with

volts

resistor

service.

and

in

-600

directly

measured

AFC

tests

to

is

illustrated

parameters and

diode

operating

control

between

power

measurement

are

as

removable

parts are panel,

as

monitoring marked

volts

frequency

and

described,

components

-200

descriptive assembly

regulated

high,

accessible

combination

volts

the

transmitter

series

conjunction

directly

are

full-scale for

meter

circuit

four

the

panel

or

are

600

various

of

supply

consisting

transmitter

For

are

(panel

in

measured

The

measure

panel

and

contained

of

paragraphs.

and

disturbing

readily

measure

-600

voltages

the inches

102

(M3)

XMTR)

difference

into

voltage,

-

the

This

floating

used

to modulator

maintenance

volt

and

are

it

•

to

in

24.

.

AFC

14

to

16.

aluminum

designated

30-volt

by

the to

Minus

300

string

-

resistor

meter,

1A

measured

systems

a

meter

is

2.13 supply

Circuit

controls of

an

parameters

-200

R33.

Fig.

schematic meter

meter

used

marked

409 divided

without

Fig.

battery

monitoring

wide,

currents, facilities

in

certain

are

following

making

currents A receiver A

is on A

is in The control

the

currents

This The The

supply

in

TL-1

The

18

resulting

and

what

for

bleeder

bay

Meter

the

(a)

(b) (panel

inches

measure

02

03

04

06

.

.

.

.

SECTION

making

and testing

follows:

TR Overall dimensions plugs, Connections

4 circuit in modifications

operating some measured 2 A. the R37. paragraph 2 2.05 R32, 2 a various results power 27.6-volt and volts schematic. appropriate output Page 2 form in

19

he

F).

M1

and two

R36 The I two the

T

53A

with

gnal

with

i

other

s

which

means

on y output

to ground

voltage periods

C9

l

output

the

drop

measure Page

and

the 2

a

deviation

Ml.

ac

R18.

these

to of with RF

the

monitoring

409-300-102 1,

Transmitter

Transmitter

meter marked

over

the

to

N this

R35 direct to

current current

current

and

cathod

in

tage O

by

DET

l

the

and

for

TI

used relative

ied

l modulated

indication

tage voltage vo

tage

DET

l

l

voltage

is provides

(panel

a

R2

Capacitors

and

circuit.

diode diode

vo

currents vo

app it

SECTION

reached.

1

changes

C

,

via

INDICA cathode

klystron

peak

full-scale means

M

4 is

is

measure

bypassed conjunction Resistors

passing observing

This measured

indicated

output

supply frequency

supply

when

FL2

a

M3 a

supply

AFC AGC

capacitors

in

when

ISS .

is the

voltage

To

voltage by

by

indication

are

meter.

are

that

C6.

output

ter TABLE

resistors

volt volt cathode

of

converter converter

6-volt

volt

output M3 il

1)

0

f

klystron power

output

used

a

V2,

causes

error

R34.

and

frequency

, tage

O

(M The

l

FL2.

provides

Receiver

detector

CR1 Receiver -20 CR2 RF B

voltage Transmitter

current

Off

Battery

-400 -20 output

to

power

vo

transmitter

and C1

cathodes

FL2

diagram measured power

cathode

smoothing

AFC

measured power

meter

calibrate a

de

is V1

Circuit

of

AGC

resistor

is

is as

a

bandpass

to

assigned

1 2 3

4 5

6 power 7

8

9

2

ated

l

monitor

through

ITION 17

10 11

ier 1

controls,

ystron This

l

l

S

50-microampere

across SWITCH

the

act

k

O

adjusting

receiver

converted

Meter

M1

used monitoring

P tip

a capacitors

S6

time.

l

fed

07

.

.

Cll klystrons, as measurements. drop

two by

are

transmitter power of M3 mu for

B and Figure 2 and through

frequency produces selectivity

when

deviation unmodu

the is

Equipped

Assembly

Panel

Board

Control

FREQ

Wiring

and

Meter

Printed

R35

n-

...

lll

®

With (ED-3C535-30)

15-J99262K

Fig. SECTION 409-300-102

- --1 / ,------20V / I o':f R3l R32 10 / M3 R37 -4'00V / 56 ~ -1 1' 1---....JV\~----cr/II II o:-:--- - 400V R33 12 SW POS MEASURES I -20 VOLTS = 10 -400 VOLTS II -200 VOLTS R28 -600V 12 -24 VOLTS

R29 -24V -400V

Fig. 16-M3 Metering Circuit-Simplified Schematic Diagram ( reduction accurately, AT2 is used to provide a highly positive with respect to the cathode, which calibrated reference level change independent of would destroy the klystron. With this arrangement, detector accuracy. Deviation is adjusted by inserting the highest positive potential that the repeller may a fixed level tone into the transmitter baseband assume is limited to the maximum forward drop amplifier and adjusting the amplifier gain control across CRl, or about 0.6 volt. An identical circuit for a specified reduction of the M1 indication. is provided for the transmitter klystron although Sensitivity of the adjustment is improved by an the components, CRll and R41, are not located on expanded scale feature provided by a bucking the meter and control panel. voltage obtained from the -20 volt supply. The bucking voltage is secured via R15, R16, and R17, 2.10 A simple transmitter linearity circuit is with R16 giving control of the voltage. Increased included here that sets the repeller voltage ( sensitivity is obtained by decreasing R13 (SENS) for best average transmitter linearity, thereby which controls the current in Ml. R14 is the eliminating involved adjusting procedures with detector load resistor. complex test equipment. The circuit shifts the repeller voltage 2 volts after it has been adjusted 2.08 The IF is monitored withS1 in the IF position, for peak power output. When adjusting for peak placing the meter across the AFC amplifier power output with R19, S5 is placed in the TST in the IF unit which is driven by the discriminator position shorting out R22. After completing this output. · Meter M1 is a zero-center type; therefore, adjustment, 85 is switched to NORM, shorting out any departure from zero indicates a shift in the R21 and removing the short from R22. This IF from its nominal value of 70 MHz. produces the desired 2-volt shift and also causes a small frequency change. It is then necessary to C. Klystron Repeller Voltage Control Circuit mechanically retune the klystron cavity for correct frequency. 2.09 Klystron repeller voltages are adjusted with potentiometers R19 and R25, designated D. Receiver Automatic Frequency Control Circuit XMTR RPLR and BO RPLR, respectively, as illustrated in Fig. 18. For klystron protection, 2.11 The following AFC circuit description is internal stops are provided at about 12,000 ohms limited to that portion of the circuit that which prevent the repeller voltages from being appears on the meter and control panel. A reduced to the same potential as the cathode. The description of the complete receiver AFC system swinger arms of the potentiometers are bypassed is contained in Section 409-300-104. The receiver with capacitors C7 and C8 to redu~enoise modulation AFC voltage corrects for frequency drifts and of the klystrons. The cathodes ~realso placed on appears across R5, as illustrated in Fig. 19, where ac ground by capacitors Cl and C6. Diode CR1 . it is added onto the BO repeller supply voltage. and resistor R1 are placed between the BO repeller The R5 voltage will change with frequency error and cathode to prevent the repeller from becoming in a direction such that a 70-MHz intermediate

Page 20 21

ORM ST

Page T N

409-300-102

LIN

VOLTS

----\.

y -20

S5

Rl7

SECTION

R22 4,

R21 Rl9

Rl6 BIAS

-600V

ISS

-400V

Rl5

XMTR RPLR

=

fr~g~~l~~

Diagram

Diagram CS

I I I I I I I

I I

If'

\

\

\

, R~2

CRII

>R41

~·

Schematic

V2

Ml

l-----T--;.0.:...-+--"JJ.f'v---'\Nv--o

TRANSMITTE!!__J RIB

AFC

f1

T

I r------, I I I I I I I I I l

TO

Circuit-Schematic

AMPLIFIER

I I I I I I I I I

_j

.v1 ______Sl

FREO

MOD

RCVRI

R2

__

Voltage

11

\

Rl2

\

IF

\

Circuit-Simplified

-400V

e~:iE

,----, I I

I I I I I I L _ I

XMTR ~

Rl

Repeller

~lr

SENS

Metering

Rl

Rl4

CRI

-

1

M3- I l I I I I I I

I I

17-M

~r-C2

_j

~ r I

I

CATHODE 18-Kiystron

CURRENTS

_j

R3

Fig.

Fig.

RS ·

~

~~

RF

-=

F-!"

FILTER

AT2

-=

BANDPASS

DET£CTDR

____

~RANSMIT~-

R25

~ I L_ r--1-,: I I

,------, I I I I l 600V I I I I I l I I I I 400V I L

GE

R

BO

AFC

RCV

RPLR

VOLTA

)

(

( (

( \. (

(

(

(

'

a

to

as

up

of

the

the

the

and

that

in

near

This

point.

alarm

which

station

station

toward

provide

adapter

system.

and

circuits.

terminal

terminal

connects

attended

the

make

excessive

direction

baseband

25

terminal

terminals

bays

to

and

designation

equipment.

the

the

an

unit.

a

toward

transmitter­

equipped

identified

between

control

the

and

purposes

radio

two

TR

radio

Fig.

amplified,

in from

on is

terminals

which

above

system

which

be

repeater

channel

are

transmits

The

of

IF

in

when

the The

For

The

the

from

required

the

the

INTERCONNECTIONS

intermediate

terminal

The

This

particular

may

order-wire,

receiver

is

attended

in

a

system

interface

location

transmits

which

receives

An

mounted

received,

output

stations

(NR):

follows.

AND

(NT}:

message

from

the

(FT):

receiver

the

is

is

(FR):

back.

as

relay

and

of

bays

receives

given

essentially

radio

contains

their

equipments

illustrated

station

purposes,

message

which

the

radio

to

is

are

are

by

the multiplex,

or

Station:

relay

the

and

electrical

nearest

of

signal

baseband

also

equipment

Station:

farthest

This

these

and

of

of

groups

Repeater

Terminal

is

the

squelch

terminal

supports

back

Terminal

terminal

consists

the

for

Repeater route

This

the

point.

20)

by

system

add

far

types

reference

uses

facilities

panel

Near Far

which Far station receiver Near

that

equipment

near terminal

ARRANGEMENTS

bracket

TL-1

the

determined

and

Terminal

the

radio

For

Repeater The (Fig. a

where

external

RF

taken

nomenclature

occurs.

wire

repeater

(2)

(1) control the

is terminal (2)

far of (1)

required

BAY

.•.

squelching

an

(a)

to (b) transmitted. operating identification, follows: drop

A

adapter

radio of bracket are for fade

unit

shows

signals. 3. 3.01 that 3.02 This paths

by

R9

the

the

the

the

for

the

The

The The

The

gain

R27.

form

TL-1

AGC

from

point error AGC

input

fades

direct

which

to

board

of in

signal.

having

correct circuit.

voltage

winding

because

improve

1800-Hz

at thereby de

Panel

addition

an

reducing

from

baseband the

and

the

S2.

new

amplifier.

its

conditions,

divided

to deep a~

which

through

clean

as

a

supply.

and,

and

error

IF and

is for The

provided

input

circuit

R26

output applied R7

RIO,

amplifier

C4 control

of

cathode

fade follows.

preventing

IF-to-baseband

frequency.

Control not

accessable

IF

de

from

windings

is

appears

the

within

current

switch

as

adjustment.

the

during loop

is

the

is not modifies

BO

the

and

off

power

oscillations

in

deep

applied

and

the

thus

4

new

amp,lifier by

of

by

BO

two

is

15)

across

rectified

voltage

supply

across

Amplification voltage

means

though

oscillations.

the

is

R8,

BO

printed-wiring system.

of

the

at

AFC

amplifier

is

draws

receiver effect,

is

limit

circuit

in

the

circuit

obtained

the

the

by

circuit

a

the

gain,

Meter

(Fig.

loop the

During C5,

is

C3

the

the

of

the

short·

initiated

to

prevent

of

from

shorting

voltage

signal supply

shorted

through

wave

the

by This

AFC is

voltage

in

keep

bias-current

of

panel

controlled

its

version

to

voltage

reference

from

panel

winding

is

to

due

filtering

(ED-3C535-30)

squelch is

To

Kl

fed

the

J99296G-2 resistors

reactance

a

voltage

AFC

shifting

the

lockout.

error

R27

maintained.

used

winding

amplifier

measure

therefore,

is

derived

filered

AFC

Capacitor

square

the

loop

of

that

complete

circuit.

is addition

is

circuit

to The

input

margin

relay

full

arrangement. AFC

is

control

regulated

AFC

releases

from

biasing

filter.

network

reference

AFC

the 409-300-102

amplified

and,

it

The

R7.

initial

wave

control.

the

wave

for

variable

control the

the An

disabling

assembly Additional A provides A unit The AFC

When

front

and

used Kl

volt

an

22 correcting loop

Rll.

phase prevent

magnetic

~odification

is

and

the

the

CAL (a) (c) receiver (b)

prevent metering the

as

pictype

reactance

-20

SECTION

and receiver and frequency to

when during

amplifier M3 square AFC mode,

signal. of 4 Because R5 relay square a a repeller

the protect

current, the AFC 2.12 E. to meter control

2.13

Page

2.14 23

I I I AMPLF

: I I I I

Page

_.

IF

1------.

TO

409-300-102

SUPPLY

RECEIVER

NETWORK

Kl

- Diagram

ISOLATOR

______

POWER

TO

Transmitter-Receiver

I r------...,

I I I. L

SECTION

R27

r-D--

4,

BIAS

-20V

~---1

Diagram

ISS

TRANSMITTER

1m

R26

DROPPING/COMBINING

Terminal-Type

MX2

Arrangement-Block

1»-----t----,

Bay

MXI

-1800CPS

@CHANNEL

Circuit-Schematic

I I I I I I I

I

-

Jl

31

20-Typical

__

'----r----'

~- 1.------'---, L I I Fig. I I I I

Control

------•

--

\

the

the

the

are

the bay

AMPLF

and

bay.

upon

from

other

Frequency

made

alarm

to

13A

of

utilized needed

voltage

system. reaches

and

and

repeater

is

outdoor

TR

a

is the

a cases

and

------

are

in

MAGNETIC or

27. ------,

transmitters

transmission

depend

of

nondiversity at

the

AGC

between

nondiv:ersity,

directly

place

I I r I I I I I I I 14 I I I I

I

I

I

L-

system

trasmitter

in

Automatic

receiver

an

C5 or and

a

and

in

receivers

either the

26

made

indoor

connection

route. different

M3

channels

and

between

polarization

the

after vary

AFC of

on

R8

used

order-wire

TO

of

2-channel

an

equipment

Fig.

are

interconnections

the

This

systems,

a

is

one

or diversity

C4

in

is connector

only

accommodates

bays

branch

of

strip

jacks

interconnections

19-Receiver

is

RPLR

radio

isolator

or

C3

between only

TR number

interconnections with

all

80

panel

Fig.

panel.

the

transmitter

which

The

JR25

I

as

the diversity

installed

spur and

for

Waveguide

output

-600V

location

connections

-400V

when

made system terminal

is

In

the

48-terminal

and baseband

transducer

R5

a

Also,

is

schematically

and

switch

the

a

radio

switch

a

Spur: station

the

size.

to

a

These

antenna Waveguide

from

Two

antenna,

(3) to

example, panels.

receivers input

80

TSA,

an

certain

TO

REPELLER

whether 3.03

whether For

installation, system, in polarizer. a arrangements and illustrated diversity the 3.04 panel. two

receiver connection diversity via

)

(

( ( (

(

(

in

in

of

at

of

the

the the

the

For

will

two

two

Fig.

two

C

B

back shift

zero,

C

main lying

extra

Here

ARM

phase

phase

filters signal

of

to

in

divided

channel

into

be

an

The

sum

designed

the

C

The

and

filters the

be

within

ARM

any

two

phase

appears

A

equal

Frequencies

input to

will

signals

are

split

D.

over

I I I I I I I I

at

into

output

reflected

opposite

terminal

filters.

specific

the

vector

on

with

lying

the

in

frequencies. have

a

be

in

hybrid.

illustrated

through

then

of

the

power

ARMS

pass

twice

reflection

in

filters

enter

inserts

as

arrive

therefore,

will

BAY

will

to Their

to

180-degree

other

difference

signal

the

input

trayel

within pass

the

and

TR

band

channel.

a

will

and

would

Diagram

at

frequencies.

will,

they

appears

of

transmitter

These

of

signal

circuit

line. the

it

The It interfering

hybrid,

arms

traveled

filters

add

and filters

connections

and

a

L------...J

I ,------..,

lying

with

vector A

of

All

of

Here

other

this

B

D.

power has

the the

band

dropped

B

antenna.

power

these

upper

D.

reflected

junction

reflection

all

arms filters.

though

their

and

without

I

the

., the

no

at

the

the

in

and

combine

Paths-Block them

ARM

the

reflection

the

are

A

down

therefore,

receivers.

the

purposes, as

to

hybrid.

of

hybrid.

A

pass

side

line of

through

frequencies

and

D

on

the

of

will

wavelength

pas!;ling

within Conversely,

enter and,

BAY

and

one

of

the

appear

none

travel

ARMS

pass amplitude,

input

main

signals

TR output

through

zero,

ARMS

reflect

band

incident outside into to will

will and band-reflection signals to terminal and band signals arrive the signals since quarter the succeeding the

be side and 4.03 combining waveguide 22,

the phase would

L------~

I

I r------,

Baseband Signal

a

a

C

is

to

in

of

C,

22 by

and

are

not

in

I I

I I I I I and I I I I I I I I I

only of

with

only

in

(Fig.

_j

latter

wave

filters,

line signals

hybrid

channel

repeater

without

a

intended antenna

does

the

and

coil

means

the paths

hybrids

difference

in

Figure

a

signals

Control

utilized

NETWORKS

action

transmitted

travel

BAY

one

appear

the

connected but

one

two

receiver in

AND

at

by

WIRE

the

ORDER

ALARM

TR

the

the

B,

networks

Gain

but of

received

the

are

Also,

of will

hybrid

equally

vector

last

because

hybrid;

signal

through

______

voltage

runs

is

insert

r------, L

I and I I I I I

and

section.

appear

C.

system

nearest

networks,

band-reflection

The

the

sum

or

A

21.

COMBINING

Each

other their

pass

input

in

AGC

88

BB

point

divided

AGC

to

on

point, is,

illustrates

receivers

network

to

combining

AND

is

Fig.

I I I

An backward, run.

composed

.J

a and

this

vector located

ARMS

in

identical

21-Automatic

extract

this

diversity

and

networks

waveguide

r-~~~~----~

is

that

That

at

and

combining

terminating

network.

low-frequency are

side

reappear

others two

Fig.

travel

their

hybrid,

BAY

incident

signal

a

The

require

or

before

DROPPING

typical

SWITCH

guide

follows.

to

TR

------.,

proportional

into

to

DIVERSITY waveguide

not the

antenna.

a

antenna

D

diagram

are

dropping

networks

illustrated

not

______

as

network

the

dropping

receiver.

··419-300-102 on

dropping

do

L I I I I I I I 1 I I I I I I I I I I I I r-- I

in

B

the

the

as

for

the Transmitters waveguide

allowing A junctions,

in

wave

the

phase

The

24

baseband of

block

a

does

a

transmitter,

CHANNiL

this

droppped

and

a

SECTION

shown station 4. 23).

The 4.01 interference. half channel while run toward

signals the wliile signal for and is equal 4.02 channel appear analogous operates are incident and A proportional

Page 25

and

Circuit

Alarm

Power

Circuit

IF

Circuits

Circuit

Receiver

Page

lighting

Schematic Schematic

Schematic

Switching

and

Stations

409-300-102

Distribution

Supply

Radio

Encoder

Wire

Radio

Radio

and

Protection

Combining

1 1

Obstruction

Transmitter- Tlr1

SECTION

Telephone-Application Order- Alarm

Tlr

TITLE Tlr for

Circuits

Applications

4, Applications

Grounding-AC

with

Service

for for

ISS

Radio-Receiver

Radio-

Radio-Diversity

Radio-Application Radio-Power

Radio Radio

Carrier-Application

Carrier-Application

Lightning

Carrier

Use 1 1 Radio

1

Radio

1 1 Navigation

1

1

Circuit Tlr

Tlr Tlr

TL-1 and Baseband Circuit Station

ON Tlr1 Schematic for

Tir for for

Tir Tlr Circuit Circuit Tlr Power Circuit

Air

SECTION

SD-97035-01

SD-81507-01

SD-97038-01 SD-97039-01

SD-97045-01 SD-97042-01

SD-97056-01

SD-95296-01 SD-:.95296-01 SD-97100-01

SD-81557-01 SD-97041-01 SD-81559-01

a

(A

the

are the the

this

used

by

radio

ARM

to

of

coaxial

to

DROPPED CHANNEL

Diagram H 24

arms

network.

1402-type are

coaxially

different

ends,

600-Circuit

split

within

two

the

arms

The

24

the

discontinuities

is

for

of

side

related

•

both

for

of

by

filters

conjugate

are

side

channel-reflection

at

is two

located are

combining

arms.

means

JUNCTION

HYBRID

JUNCTION

HYBRJO themselves

the

Changes

The

caused

TITLE

are

(C),

Netwerk-Biock

by

There

required

and

which side

waveguide

are

Different

located

illustration

etc. Radio

L----.,....-+-..;.._-

drawings

(D)

arms

studs

CHANNELS

ARM 1

two

INPUT

an

that

between

filters

A

A

ARM

E

Dropping

reflections

Loading

is Tir

side

the

E

dropping

LIST

ARM

OTHER

probe,

channels.

an

23

the

junctions, Tuning

H

junctions.

probes

located

following

of

The

form

to

reflection

minimize

and

to

are wedge,

Figure channel

section:

The

to

of

hybrid

22-Channel

hybrid

B),

different

REFERENCE

the

ARM.

coupled

SECTION

Fig.

4.04 E composed and The

hybrid waveguide wedge in connected. is filters

two codes 5. channels. for

5.01

SD-3C250-01

..

c· ( (

( SECTION 409-300-1 02

Fig. 23-1402- Type Channel Dropping and Combining Network

Page 26 ISS 4, SECTION 409-300-102

PART OF C25 C24 TSI 282A TS ON P7A AND P78 R3 R7 EAI SENS 3 Rl4 P7A J7A .----'+"'lJ?-:-.±J(I------~ J99262E PANEL 80 RPLR 1 NOTES: 88 (I AND AND ~~6 ' I I\ R45 ~:GNETIC 7~~--l~~RA9~-~:~::B r~2~:;~1A3~~-_._l__ t____ B___ B_IA-S-.-~3---..-~A•vA·~~~~ 78 7 I. M2 TIMER HAS BEEN MANUFACTURE I R GRD P J B 8 R G Rl7 - ---, 7 AI ~ - -- -- E- ~ DISCONTINUED (MD). I CRI AMPLIFIER ..,. -20V <>----..~1~.fv-:2~---lf-----....I\M--- _K ..£_R~ ...l A .>TI_...______-1---<11~----+---I-400. 1- ____ _! ~ __ 2. REFER TO LATEST ISSUE OF I r-p C22 A <"" \ Ml t---<~~, Rl6 7 3 SD- 97038-01 FOR COMPONENT I _:.. 400~ J 7 A20 >:1 25 1------_:.400V_ - VALUES AND CODES. I Rl m IF Rl5 4n \_:;~-~-_?~~--~',.A -600V I 21 --- -1 I /f'C4 CR2 Rl2 PART OF 7 e11 1- ____ ~6oov__ R2 RS I 80 CATH R5 1 4 ~-==~~ AFC rf7 P7A AND P7B _ -~OO~I..!J ~ I 26 -400V FIL 810 ~__;;;.;;...;:.;.;.;..:..;_____ ..._ ..... 'l/li'lr---- -400V 52 XMTR FREQ 82 KLYSTRON 20V CHASSIS 821 7 1 1 -410.5 FIL I I 27 GROUND REGULATED GROUND I -410.5 FIL I 3 5 - ---t 7 817 I SUPPLY GROUND I :~ON~.-~~~+------=A~FC~+4~ TO '----!----...... _; RIO I , A21 · _1eoo rv _1 -) Al - 13 f- _ :.,_ _ ~ ~o..2._rv~ _ I 4 1 POWER I '-----t-----~CO~F~F,___ ,__. ______~A~F~C~I~ ~ 1800'V I I I I 14 I I 1800'\., B SUPPLY 4 Al9 Kl Rl l I -- --17AI7 I -1+------SHIELD I , ISOO'V I I I 16 I I 1800'\., C I I , 816 ---47AII -I+------I 1800'V I " All - 20V I I 6 .,. . -20V I 115VAC ---47~ 1 -L------Bl ~.....:..:.::....:.;c:.;;___ __, -27 6V I 1 5 I -27.6V '---t------+-----~------~------~~~IS~OO~'V~I~~ Al4 ..:. _ .-- 7 820 -I------I ,______, ______-+----~------~~18~0~0~'V~:4 : I I, Al7 _!I~~J7BI I 33 -~--_!A~-- i--"' ( - ; ... - I ..~~~: Or--.~:-:~,_ 2---~.s--~-_'_r_-~--- ;"C c~. 7 I -11~~ _j. 7 83 35 - L- - _!!.E!:!.!- - I Ll FIL ACT 'I C r---~nn~------1----+------~CR~I--~1~8 1 5 _SHIE~ -+ ~ B 16 ">+l______.__ -!--1f--+---+--I-O.II-+- - ~ I S3 FIL ACT I AGC I I I AGC PS./ I S4 7 I !.---;- XMTR -- -~7 813 I I @ -20V I I 115VAC j_ ~~ 56 12 3;}-Frt£5 2 TO FIG. B 83 ~~------'1 o- .-'-<>- I ' I ~ II 2 f .,. AFC I : • @ * +--f--+------A.:.F:::._C:...___ II-( TO --- -4 A21 ~8 >-t-+-f-+-t--t------__;..::....:~--1-( 4 RCVR IF 1 '------~1 R26 AFC SQUELCH " A 7 >;-< : 2 \ ' s...._.,.IO=-----l----_-___ l..J--.-:7: -20V 2 . AFC I AFC I ~' .:_=_=--...====~~:t:=•~ - -- 1 7 Al9 )-k @ 6 AND I FROM FIG . A ._____ --+1--<>3+ 0 ~ .9 '---.__/ AFC I I 3 GRD I 88 CKTS I t t 1 Kl I 2 I_..,~-., SQUELCH I _,. : @ _ I I TO FIG. 8 ----t 7 A2 ,)-+--..::::..--f--+-f--+------'------.....1....(, 3 I ~ IR27 I 4 t. t 'I 8 I I ... I 80 FIL R43 Ae~---'~~------~---4----_.~~._----• 16 7 1 w : £ I I I T ' _j 7 818 I R23 -C~ - ~>-t~------+--l--t---+---t---l~d------=C:.;.R:.:2_ R44 R24 CRI I A '-' CRI JTO lA I XMTR FIL - -- j7 815 MODULATOR A9~~~~~------~~~~----~A-----~~------+-~~ I - B£..!l~R ~ 7 88 I RPLR 3' I L2 I t---1------,-----'-__.:.F..::I L:.._~I-< XMTR RPLR BO RPLR ---}-j------~---fVVrL______~C~R~2~1l} I 7 I R22 t I 8~ I 1 8 ~t FIL _ ./ TO RCVR I I r------t------~2~7~. 6~V~I~ 820 - £.!'~~ 7 AB 2 CATH I ./ KLYSTRON I I I~~ 3 R28 '---t--t-~--~~1------~~------~~-~2~o~v~!4 A7 -~~~7810 L 8 A5 ~:-x_M_T_R_R_P_LR---II------'3'KRI 9 \:1 R25 ~:::.._--...------· 1 I , I CAV I 2 T I 2 NOR I CIOS lea I ETXI ~o---~-_. I I ~:~~+-+-~~~ I UN -lv 1 I !> . I ss I I Ml ... I I CRII I _I_ ' _XMTR_!.W~ )-j~----t--t-+-t---i-~--1---1.:::::riJ---T~O_X_M_T_:R.;__PW.;__R...;D..;;E_:T_ I R21 7 819 RIB .. _X~R FR~ 7 821 '>-+-1___ __,_ __ +---t--+--+-+---~"=d------~T-=O...:X:.:M::..T:.:.R::....:...:FR:.:E:.:Q:.....::D.=.ET.:.._ 814 ~~>--..;.X.:;.M.:;.T..:.R..:.C:.;.A:.;.T.:..:H_..-¥./Ir---- 'I ~ - _X!!!!R RPI::!!J. A " RPLR - 7 5 : ~ R42 FtL l; : ;> R31 TO TRS _XMTR.f!.L-i 7 A9 ~ I FIL : 2 - 400V -'-----· KLYSTRON _XMTR~'!:!:!J , CATH ~ / S R32 ;;;·~ 7 814 CR2 (4)\ I /6) CATH , T CAV I 7 ETX2 R6 CRI(3)...._ . ,.--(7)RFPW~ Jl- lC GRD -20V v ~ XMTR y~ R33 AFC (2)- ~ - ( 8) CATH J Ts21L______,j cs -410.5 _.!! GRD - 20 (I)/ '-(9) Of'F P~C21 -400V -600V -400V FIL FIL "' PART OF P7A AND P78 BAT. (12/ I \(10) -400 " -200 (II) TO TRS B8AMP =1--A3 A20 811 82 · 817 AI 56 SWITCH FRONT TO FIG. 8 FIG. A FIG. B

Fig. 24-Typical Meter and Control Panel Circuit--Schematic Diagram

Page 27

28 28

Block Block

SiliHAL SiliHAL

$W $W

I"AO I"AO

Page Page

OR OR

TWO TWO

OR OR

C'Oitf/1. C'Oitf/1.

409-300-102 409-300-102

STATIOI'I STATIOI'I

TONE TONE

D/V£1?$/TY D/V£1?$/TY

0/'ILY 0/'ILY

A A

BASEBAND BASEBAND

PLUS PLUS

WIRE WIRE

PLll$ PLll$

RCCEIVFR RCCEIVFR

WIH£ WIH£

ONLY ONLY

TRANSMITTER TRANSMITTER

TERMINAL TERMINAL

SECTION SECTION

KMTI?S KMTI?S

LEG£ND LEG£ND

4, 4,

T'll'O T'll'O

TON£ TON£ C'OMPOSt7C C'OMPOSt7C

iiAO!O iiAO!O

RADIO RADIO

RCVRS RCVRS

System-Functional System-Functional

MESSAGEC'KTS MESSAGEC'KTS

ORO£/'i ORO£/'i

QROCR QROCR

ISS ISS

""AR-END ""AR-END

Radio Radio

-·-·-

-0-0-

-x-x-

TL-1 TL-1

Diagram Diagram

25-Typical 25-Typical

I I

! !

Fig. Fig.

OR OR

I I

; ;

WIP£-LINE WIP£-LINE

LL LL

C'ARRIER C'ARRIER

TERMINALS TERMINALS

SPUR SPUR

EXT£/'ISIO/VS EXT£/'ISIO/VS

r· r·

i i

f f

i i

L L

TO TO

r-<> r-<>

i i

Lxf-x Lxf-x

I I

I I

X X

1 1

1 1

OP OP

0-0_j 0-0_j

o-o---' o-o---'

I I

i i

r r

C'AR/UCR C'AR/UCR

SPUR SPUR

NEAP NEAP

j j

J J

i i

t t

SPUR SPUR

x-x--x-x-, x-x--x-x-,

'oRDlR-IWRE 'oRDlR-IWRE

TO TO

x-><-X* x-><-X*

REMOTE REMOTE

5u85ET 5u85ET

x-

RADIO RADIO

[;:;~~!< [;:;~~!<

t:W t:W

C'I<:TS C'I<:TS

TfON TfON

STA STA

CARRIER CARRIER

ro ro

MVLT!PLCX MVLT!PLCX

' '

SPUR SPUR

rx---4---

)C )C

t t

i i

r r

r r

,.J ,.J

t t

iNTF:I

TION!!. TION!!.

RADIO RADIO

! !

t t

T/ON T/ON

FUN( FUN(

SYSTEM SYSTEM

ORDER-WIRE ORDER-WIRE

EX EX

JUNC JUNC

TIPL TIPL

RADIO RADIO

Mill Mill

SHOWIN(i SHOWIN(i

Tl-1 Tl-1

A/10 A/10

TYPICAl TYPICAl

DJA(fRAM DJA(fRAM

~AI.-, ~AI.-,

CW CW

ALl ALl

AND AND

REMOTELY REMOTELY

TN£ TN£

15 15

EqtJIPMENT EqtJIPMENT

CABINET CABINET

LOCATED LOCATED

81/Y 81/Y

RJR RJR

CONTA/NIN(# CONTA/NIN(#

Et;t;;PMENT, Et;t;;PMENT,

NfJT NfJT

T/R T/R

IF IF

MvtTIPLU MvtTIPLU

NAME NAME

Tl-1 Tl-1

STATION STATION

8AY 8AY

END END

NEAR-END} NEAR-END}

SPUR SPUR

IUPtfA7£R IUPtfA7£R

DIVERSITY DIVERSITY

FAR FAR

TERMINAl TERMINAl

• •

LEGEND LEGEND

INf"CRMCOMT£' INf"CRMCOMT£'

N N

D D

S S

P. P.

T-

F F

·c:_ ·c:_

BAY BAY

B4Y B4Y

• •

T£RMINAL T£RMINAL

Ole Ole

FR FR

FRD FRD

T/17 T/17

SYST£M SYST£M

FACIN(O FACIN(O

FAR-END FAR-END

FACIN(i FACIN(i

R£41/LAR R£41/LAR

TIP TIP

FAR-END FAR-END

£ £

f--

!DIVERSITY !DIVERSITY

1----

-1 -1

TL TL

i i

! !

I I

INTERMEDIATE INTERMEDIATE

FAR-END FAR-END

FM FM

4NOS!ATIOHS 4NOS!ATIOHS

BAY BAY

INTEJ

t t

SPtJR SPtJR

NRO NRO

T/17 T/17

TIRBAY TIRBAY

FM:IIV(i~ FM:IIV(i~

FACIN(O FACIN(O

lii€"'LAR lii€"'LAR

NEAR-ENO NEAR-ENO

011/ERSITr 011/ERSITr

JVNCriON JVNCriON

N£AR-£110 N£AR-£110

BA~ BA~

1----

.-----'ST,"''ATION .-----'ST,"''ATION

'r-'--NR 'r-'--NR

TO TO

T/R T/R

NOMENCLATVR£ NOMENCLATVR£

STATION STATION

"L_ "L_

TERMINAL TERMINAL

STATION STATION

TERMINAL TERMINAL

NEAR-END NEAR-END NCAR-E:NO NCAR-E:NO ISS 4, SECTION 409-300-102

FAR-END AIR PATH NEAR-END INTERMEDIATE INTERMEDIATE AIR PATH INTERMEDIATE INTERMEDIATE TERMINAL TERMINAL STATION -z NO.2 s- STATION NO.3 STATION STATION STATION 6, LEGEND STATION I STATION 2 STATION 3 STATION 4 STATION 5 OR II I . ~ IS A CHANNE·L DROPPING/COMBINING NETWORK. 7 ,8,9,10, v v v v H 2 . 1----=ii IS AN ISOLATOR. cr cr cr cr cr a:: cr cr N N N N N "'N N 3 A BASIC LETTER AND ITS PRIME LETTER CONSTITUTE AN "' "' "' "' "' - "' N 0: cr cr cr 0: cr 0: "' EQUIVALENT 4-WIRE CIRCUIT (XX', YY~B ZZ') WHICH MAY Y cr ...J ....J .. ..J .. .. BE CONNECTED TO A 2-WIRE LINE CIR

• T T R (VJII,115(8Al /{=:J---- (V)II,I55(5A) -- -{=~ -- (Hlii,I15(8Al - -~ (HJIIJ55(5A) i/R BAY ARRANGEMENT AND FREQUENCY PLAN T T ~=:J--- !Hl11,035(12AJ-- -c=l\. )C=J---- (HIIi,orst9Al ----c::::JZ -- (VJII,035(12A) -- (V)II,075(9A) FOR AS MANY AS {3 TWO-WAY DIVERSITY CHANNELS y' y' T 6 TWO-WAY NONDIVEfiSITY CHANNELS /C=J----- 1Hl!0,995(3AI ---c=J!: ~=J-- -IVJI0,955(2Al - --C:::::JK /(=]- - - (V)I0,995(3A) - - -{=~ -- (H)I0,995(2A) (H)I0,995(3A) z' z' ~TC::::J--- (Vl 10,915(7Al -- -{=~ ~=J-- -(H)I0,875(6A) -- -c=~ x:=J-- -(H)I0,915(7Al ---[=~ - -(V)I0,875(6A) --(V)I0,915(7A) x' T x' ~T=::J--- (H)10,8351!1A)-- -c=r.; ~:::J-- -(V)I0,795(IOA)-- -c=r.: --(HJI0,795( 10A)-- (HJIO,B35!11Al -- T --

~TL=f--- (V)I0,755(1A) -- -{=::r;;R ~RC::J-- -IH)I0,715(4A) -- -1· =:Y,T iTC::J--- IHII0,7551!Al --- -c::Jr.;R --- !V)I0,715(4A) R -- T -- (V)I0,755(1A) --

Fig. 26-Transmitter .. Receiver Arrangement and Frequency Plan-Block Diagram

Page 29 ISS 4, SECTION 409-300-102

I DIV CHAN IF CAB INETS ARE I DIV CHAN IF CABINETS ARE OR J OR USED IN SYSTEM USED IN SYSTEM . [ 2 .NONDIV CHAN 2 NON DIV CHAN % 2 3 IF NO CABINETS ARE[ l, , OR DIV CHAN I, 2 ,OR 3 DIV CHAN J IF NO CABINETS ARE OR OR USED IN SYSTEM USED IN SYSTEM MORE THAN 3 NONDIV CHAN . MORE THAN 3 NONDIV CHAN USED FOR I NONDIV CHAN . USED FOR I NONDIV CHAN a: 1ST 2ND 3RD 3RD 2ND 1ST a: IF CABINETS ARE USED ~ laJ IF CABINETS ARE USED N DIV DIV DIV DIV DIV DIV N IN SYSTEM TRANS- TRANS­ IN SYSTEM OR DUCER a:c:r ~---+~<,....-< ·-..~>---+~<~-<·-·..)-+to ..... -.., ---+wo"""""-c•-• .;>-~)l't--< •-• .;>--hell+--~ a:c:r DUCER OR I ,2, OR 3 NONDIV CHAN ...J ...J 1,2,0R 3 NONDIV CHAN 0 0 IF NO CABINETS ARE a.. a.. IF NO CABINETS ARE USED IN SYSTEM USED IN SYSTEM ..

1ST 2ND 3RD 3RD 2ND 1ST REG REG REG REG REG REG

FAR-END TERMINAL _____,_,;______. .... 14• . ------NEAR-END TERMINAL j INTERMEDIATE STATION LEGEND t I : ® IS A CHANNEL DR 0 P PING/COMB IN I N G NETWORK 2. I =--+I IS AN ISOLATOR 3. RECEIVERS PAIRED FOR PROTECTION ARE COMBINED AT A DIVERSITY SWITCH 4. TRANSMITTERS PAIRED FOR PROTECTION ARE COMBINED AT A SPLIT PAD 5. T- TRANSMITTER RAD I 0 EQUIPMENT GROWTH PATTERN 6. R- RECEIVER RADIO EQUIPMENT FOR T/R BAYS I TO 6: TWO-WAY NONDIV CHANS AND I TO 3 TWO -WAY D IV CHANS

Fig. 27-TransmiHer-Receiver Growth Pattern-Block Diagram

Page 30 30 Pages