MFJ-1278 MULTI-MODE DATA CONTROLLER MFJ-1278B MULTI-MODE TABLE OF CONTENTS TABLE OF CONTENTS 1. INTRODUCTION ............................................................................................. 1 2. COMPUTER INTERFACING ............................................................................. 4 MFJ Starter Packs ........................................................................................ 4 Computer Interface with MFJ Starter Pack ..................................................... 4 Computer Interface without MFJ Starter Pack ................................................. 5 SERIAL PORT SIGNALS ........................................................................................... 5 COMPUTER WITH SPECIFIC SERIAL INTERFACES ..................................................... 6 Apple Macintosh .......................................................................................... 6 Commodore C64, C128 and VIC-20................................................................ 6 IBM PCjr....................................................................................................... 7 Radio Shack Color Computer ........................................................................ 7 Color Computers .......................................................................................... 7 IBM PC/XT/AT/386/486 and compatibles Computer ........................................ 8 Other Computers with Nonstandard Serial Ports ............................................. 8 TERMINAL SOFTWARE REQUIREMENTS ................................................................... 9 Apple Macintosh .......................................................................................... 9 Apple II, II+, IIe, IIc ................................................................................... 10 Commodore C64, C128 and VIC-20 ............................................................... 10 IBM PCjr ..................................................................................................... 10 IBM and Compatible Computers .................................................................... 10 Radio Shack Color Computer ........................................................................ 11 Radio Shack Model 100/102 and NEC 8201 .................................................... 11 MFJ-1278B SERIAL PORT PIN FUNCTIONS ............................................................... 11 COMPUTER BAUD RATE .......................................................................................... 12 Autobaud .................................................................................................... 12 Changing Terminal Baud Rate ....................................................................... 13 VERIFYING SERIAL PORT OPERATION ..................................................................... 13 PARALLEL PRINTER PORT ....................................................................................... 14 Printer Port Connection ................................................................................ 14 Printer Consideration ................................................................................... 15 Printer Port Test .......................................................................................... 15 3. RADIO INTERFACING ..................................................................................... 17 MFJ-1278B Radio Ports ................................................................................ 17 RADIO PORTS CONNECTION .................................................................................. 17 HANDHELD RADIO CONNECTION ............................................................................ 18 RADIO INTERFACING METHODS ............................................................................. 19 Method 1: Direct Connection to Microphone and Speaker ............................... 19 Transmit Audio Level Adjustment for Method I Interface ...................... 19 Setting the Receiver Audio Input Level ................................................ 20 Method 2: Accessory Jack or Interface Box Connection ................................... 21 Transmit Audio Level Adjustment for Interface Method II ..................... 22 Receiver Audio Setting ....................................................................... 23 HARMONICS INTERFERENCE .................................................................................. 24 MONITOR SPEAKER CONNECTION .......................................................................... 24 CW INSTALLATION ................................................................................................. 24 Keying Connection ....................................................................................... 24 Key Paddle Connection ................................................................................. 25 FSK CONNECTION .................................................................................................. 25 I MFJ-1278B MULTI-MODE TABLE OF CONTENTS 4. BASIC OPERATION – GETTING STARTED ...................................................... 25 First Steps ................................................................................................... 26 Basic Commands ............................................................................... 26 SERIAL PORT CONFIGURATION .............................................................................. 27 Parity and Word Length ................................................................................ 27 Echos ......................................................................................................... 28 New Lines and Line Wrapping ....................................................................... 28 THE MFJ-1278B MULTI-MODE MODEM ..................................................................... 29 OPERATIONAL MODES ........................................................................................... 30 Verifying Operation Status ...................................................................................... 30 Mode Switching With the MODE Command ............................................................... 30 Radio Port Switching .............................................................................................. 31 MEMORY BUFFERS ................................................................................................. 31 Loading the Memory Buffers ......................................................................... 31 Transmitting the Memory Buffers .................................................................. 32 Buffer Serial Numbering ............................................................................... 32 Memory Repeat and Buffer Repeat Time ....................................................... 32 Chaining the Memory Buffers ........................................................................ 33 TUNING INDICATOR ............................................................................................... 33 PACKET OPERATION .............................................................................................. 34 VHF Packet ................................................................................................. 34 A Connecting and Disconnecting Exercise ............................................ 34 Digipeating ....................................................................................... 35 Unsuccessful Connections .................................................................. 36 Monitoring Channel Activity ................................................................ 37 Your First Packet QSO ....................................................................... 38 Starting the QSO .................................................................... 38 Digipeating ............................................................................ 39 Monitoring on the Air .............................................................. 40 Special Input Characters .................................................................... 40 BASIC HF PACKET OPERATION ............................................................................... 41 HF Packet Operation Hints ............................................................................ 42 PACTOR ................................................................................................................ 43 What is PACTOR? ........................................................................................ 43 PACTOR Operation........................................................................................ 43 FEC Unproto operation ................................................................................. 44 PACTOR ARQ .............................................................................................. 44 Changeover ...................................................................................... 45 Monitoring ........................................................................................ 45 Monitoring AMTOR ARQ requests .................................................................. 45 Exiting PACTOR Mode .................................................................................. 45 Operating Hints ........................................................................................... 45 Threshold Control Setting .................................................................