Meguro Meguro Electronics Corporation in the Search for Supreme Quality and Reliability
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Radio Wave Spectrum Allocations and Dial Markings on Old Radios – Page 1
Radio Wave Spectrum Allocations and Dial Markings on Old Radios – page 1 When you look at the dial of an old radio you may be confused by the numbers and letters written on the dial. In Australia and New Zealand the dials of Medium Wave radios (often called the Broadcast Band) were usually marked with the station call signs. In Australia, if the dial scale was quite small, a radio would only have the stations in that state marked on the dial. Some radios also had the Frequency and/or the Wave Length marked but this was not common throught period from 1936 to the end of the Australian made radios. Medium Wave Broadcast Band This is the band we tune to when we listen to an AM radio and most countries use frequency allocations between 526.5KHz and 1705KHz. Not all countries use all this allocation. Stereo transmission is possible and has been offered by some stations in the U.S., Canada, Mexico, the Dominican Republic, Paraguay, Australia, The Philippines, Japan, South Korea, South Africa, and France. However, there are multiple standards for AM stereo with C-QUAM being the most common in the United States as well as other countries, and receivers that implement the technologies are relatively rare. The FM Broadcast Band This is the range of frequencies we tune to when we tune a modern FM radio receiver. The international frequency allocation for this band is now 87.5MHz to 108MHz. This is often referred to as the CCIR Band. Over the years some countries have used other frequencies for this band and you will see these on the dials of some old FM radios you may find from time to time. -
Tau-100 Test Report S/N: 02280382
TAU-100 TEST REPORT S/N: 02280382 Prepared by: Aaron Sivacoe Date: April 8, 2005 Contents Contents ____________________________________________________________________ 2 Test Equipment______________________________________________________________ 3 Performance Specifications ____________________________________________________ 4 Visual Power Output Rating ___________________________________________________ 4 Visual Power Adjustment Capability ____________________________________________ 5 Aural Power Output Rating ___________________________________________________ 6 Carrier Frequency Tolerance __________________________________________________ 8 Visual Frequency Response __________________________________________________ 11 Intermodulation Distortion ___________________________________________________ 14 Spurious Emissions_________________________________________________________ 16 Modulation _______________________________________________________________ 18 K Pulse to Bar (Kpb) Rating__________________________________________________ 19 2T Pulse K (K2T) Rating ____________________________________________________ 20 Chrominance-Luminance Gain Inequality _______________________________________ 21 Chrominance-Luminance Delay Inequality ______________________________________ 22 Differential Gain Distortion __________________________________________________ 23 Differential Phase Distortion _________________________________________________ 24 Group Delay Response ______________________________________________________ 25 Horizontal Timing__________________________________________________________ -
Guidelines for FM Broadcast Standards
TECHNICAL GUIDELINES FOR FM BROADCAST STANDARDS Directorate of Technical Regulations February 2014 94, Kairaba Avenue, P. O. Box 4230 Bakau, The Gambia Tel. (220) 4399601 / 4399606 Fax: (220) 4399905 EMail: [email protected] Website: www.pura.gm Contents 1. DEFINITIONS ........................................................................................................................... 2 2. INTRODUCTION ...................................................................................................................... 3 3. CLASSES OF FM BROADCAST STATIONS ........................................................................ 3 3.1 Public/Commercial FM station .................................................................................................. 3 3.2 Community Fm Stations ............................................................................................................. 3 3.3 Educational/Scientific FM station [Non Commercial] ............................................................... 3 4. FREQUENCY SPACING .......................................................................................................... 3 5. TECHNICAL REQUIREMENTS ............................................................................................. 4 5.1 Safety Requirements ................................................................................................................... 4 5.2 Transmitting Facilities ............................................................................................................... -
Iq-Analyzer Manual
iQ-ANALYZER User Manual 6.2.4 June, 2020 Image Engineering GmbH & Co. KG . Im Gleisdreieck 5 . 50169 Kerpen . Germany T +49 2273 99 99 1-0 . F +49 2273 99 99 1-10 . www.image-engineering.de Content 1 INTRODUCTION ........................................................................................................... 5 2 INSTALLING IQ-ANALYZER ........................................................................................ 6 2.1. SYSTEM REQUIREMENTS ................................................................................... 6 2.2. SOFTWARE PROTECTION................................................................................... 6 2.3. INSTALLATION ..................................................................................................... 6 2.4. ANTIVIRUS ISSUES .............................................................................................. 7 2.5. SOFTWARE BY THIRD PARTIES.......................................................................... 8 2.6. NETWORK SITE LICENSE (FOR WINDOWS ONLY) ..............................................10 2.6.1. Overview .......................................................................................................10 2.6.2. Installation of MxNet ......................................................................................10 2.6.3. Matrix-Net .....................................................................................................11 2.6.4. iQ-Analyzer ...................................................................................................12 -
Electrical & Electronics Measurement Laboratory Manual
DEPT. OF I&E ENGG. DR, M, C. Tripathy CET, BPUT Electrical & Electronics Measurement Laboratory Manual By Dr. Madhab Chandra Tripathy Assistant Professor DEPARTMENT OF INSTRUMENTAION AND ELECTRONICS ENGINEERING COLLEGE OF ENGINEERING AND TECHNOLOGY BHUBANESWAR-751003 PAGE 1 | EXPT - 1 ELECTRICAL &ELECTRONICS MEASUREMENT LAB DEPT. OF I&E ENGG. DR, M, C. Tripathy CET, BPUT List of Experiments PCEE7204 Electrical and Electronics Measurement Lab Select any 8 experiments from the list of 10 experiments 1. Measurement of Low Resistance by Kelvin’s Double Bridge Method. 2. Measurement of Self Inductance and Capacitance using Bridges. 3. Study of Galvanometer and Determination of Sensitivity and Galvanometer Constants. 4. Calibration of Voltmeters and Ammeters using Potentiometers. 5. Testing of Energy meters (Single phase type). 6. Measurement of Iron Loss from B-H Curve by using CRO. 7. Measurement of R, L, and C using Q-meter. 8. Measurement of Power in a single phase circuit by using CTs and PTs. 9. Measurement of Power and Power Factor in a three phase AC circuit by two-wattmeter method. 10. Study of Spectrum Analyzers. PAGE 2 | EXPT - 1 ELECTRICAL &ELECTRONICS MEASUREMENT LAB DEPT. OF I&E ENGG. DR, M, C. Tripathy CET, BPUT DO’S AND DON’TS IN THE LAB DO’S:- 1. Students should carry observation notes and records completed in all aspects. 2. Correct specifications of the equipment have to be mentioned in the circuit diagram. 3. Students should be aware of the operation of equipments. 4. Students should take care of the laboratory equipments/ Instruments. 5. After completing the connections, students should get the circuits verified by the Lab Instructor. -
Digital Radio Power Increase
Before the FEDERAL COMMUNICATIONS COMMISSION Washington, D.C. 20554 In the Matter of ) ) Digital Audio Broadcasting Systems ) MM Docket No. 99-325 And Their Impact On the Terrestrial Radio ) Broadcast Service ) ) COMMENTS OF THE NATIONAL ASSOCIATION OF BROADCASTERS The National Association of Broadcasters (NAB)1 hereby responds to the Public Notice2 soliciting public comment on recent filings in the digital audio broadcasting proceeding. By this Notice, the Media Bureau of the Federal Communications Commission (FCC) is seeking comment on three filings: a request by 18 radio broadcasters and the four largest manufacturers of broadcast transmission equipment (Joint Parties) to permit a voluntary increase in digital power for FM digital broadcasters, up to a maximum of 10 percent of a station’s authorized analog power;3 a technical report by iBiquity Digital Corporation (iBiquity) examining the benefits of this proposed increase in digital power, the compatibility with analog broadcasting and the potential interference effects 1 The National Association of Broadcasters is a trade association that advocates on behalf of more than 8,300 free, local radio and television stations and also broadcast networks before Congress, the Federal Communications Commission and the Courts. 2 Public Notice, DA 08-2340, MM Docket No. 99-325, October 23, 2008. 3 Joint Parties Ex Parte letter, filed in MM Docket No. 99-325, June 10, 2008 (Joint Parties request). resulting from the proposed increase;4 and a study by National Public Radio (NPR) on Corporation for Public Broadcasting-supported research on digital radio coverage and interference.5 As discussed below, the benefits of permitting FM broadcasters to optionally increase the power in their digital signal are compelling. -
A History of Impedance Measurements
A History of Impedance Measurements by Henry P. Hall Preface 2 Scope 2 Acknowledgements 2 Part I. The Early Experimenters 1775-1915 3 1.1 Earliest Measurements, Dc Resistance 3 1.2 Dc to Ac, Capacitance and Inductance Measurements 6 1.3 An Abundance of Bridges 10 References, Part I 14 Part II. The First Commercial Instruments 1900-1945 16 2.1 Comment: Putting it All Together 16 2.2 Early Dc Bridges 16 2.3 Other Early Dc Instruments 20 2.4 Early Ac Bridges 21 2.5 Other Early Ac Instruments 25 References Part II 26 Part III. Electronics Comes of Age 1946-1965 28 3.1 Comment: The Post-War Boom 28 3.2 General Purpose, “RLC” or “Universal” Bridges 28 3.3 Dc Bridges 30 3.4 Precision Ac Bridges: The Transformer Ratio-Arm Bridge 32 3.5 RF Bridges 37 3.6 Special Purpose Bridges 38 3,7 Impedance Meters 39 3.8 Impedance Comparators 40 3.9 Electronics in Instruments 42 References Part III 44 Part IV. The Digital Era 1966-Present 47 4.1 Comment: Measurements in the Digital Age 47 4.2 Digital Dc Meters 47 4.3 Ac Digital Meters 48 4.4 Automatic Ac Bridges 50 4.5 Computer-Bridge Systems 52 4.6 Computers in Meters and Bridges 52 4.7 Computing Impedance Meters 53 4.8 Instruments in Use Today 55 4.9 A Long Way from Ohm 57 References Part IV 59 Appendices: A. A Transformer Equivalent Circuit 60 B. LRC or Universal Bridges 61 C. Microprocessor-Base Impedance Meters 62 A HISTORY OF IMPEDANCE MEASUREMENTS PART I. -
Shortwave-Listening
Listen to global news in the making! Monitor transmissions from Voice of America. Radio Canada, Radio Netherlands. Radio Moscow and many others. Learn how radio waves tra- vel. Get information on popular shortwave bands and licensing for a Itypes of equipment. Radio Listener's Guide by William Barden, Jr. Radio Shack A Division of Tandy Corporation First Edition First Printing-1987 Copyright01987 by William Barden Jr., Inc. Printed in the United States of America. All rights reserved. Reproduction or use, without express permission, of editorial or pictorial content, in any manner, is prohibited. No patent liability is assumed with respect to the use of the information contained herein. Library of Congress Catalog Card Number: XX-XXXXX Radio Listener's Guide T Table of Contents Section I World of the BBC, Radio Moscow, Police Calls, Aircraft Communications, and Hams Chapter 1. Radio—What Is It' Generating Radio Waves—The Radio Spectrum—Radio Equipment and Frequencies—Band Use—How Radio Waves Travel—Radio Licenses and Listening—Subbands and Channels—Radio Equipment Chapter 2. Types of Broadcasting Voice Communication—Code Transmission—Teleprinter Transmission— Facsimile Transmission—Slow-Scan Television—Fast-Scan Television — Repeaters— Portable Phones—Satellite Reception—Transmitting Power Chapter 3. Shortwave Broadcasters Frequency Assignments—The European Long-Wave Band—The AM Broadcast Band—Tropical Broadcasting-49- and 41-Meter Bands-31- and 25-Meter Bands—Above the 25-Meter Band—A Typical Listening Session—Logging Foreign Stations—Foreign Broadcast lnformation—QSL Cards Chapter 4. Other Types of Broadcasting in the Lower Frequencies Transmissions Below the AM Broadcast Band—The AM Broadcast Band— Portable Phones—Marine Transmissions—CW Transmissions—Radio Teleprinter—Single Sideband—Time and Frequency Signals—Weather Maps by Facsimile—Citizen's Band Frequencies—The Russian Woodpecker—Pirate and Clandestine Stations Chapter 5. -
1720/1721 Vectorscope (S/N B060000 & Above) 070-5846-07
Instruction Manual 1720/1721 Vectorscope (S/N B060000 & Above) 070-5846-07 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to all safety summaries prior to performing service. www.tektronix.com Copyright E Tektronix, Inc., 1986, 1990, 1993, 1995. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published ma- terial. Specifications and price change privileges reserved. The following are registered trademarks: TEKTRONIX and TEK. For product related information, phone: 800-TEKWIDE (800-835-9433), ext. TV. For further information, contact: Tektronix, Inc., Corporate Offices, P.O. Box 1000, Wilsonville, OR 97070--1000, U.S.A. Phone: (503) 627--7111; TLX: 192825; TWX: (910) 467--8708; Cable: TEKWSGT. WARRANTY Tektronix warrants that this product, that it manufactures and sells, will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If any such product proves defec- tive during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expi- ration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid. -
Kidsdictionary.Pdf
Access Charges: This is a fee charged by local phone companies for use of their networks. Amplitude Modulation (AM) that's the "AM" Band on your Radio: A signaling method that varies the amplitude of the carrier frequencies to send information. The carrier frequency would be like 910 (kHz) AM on your AM dial. Your radio antenna receives this signal and then decodes it and plays the song. Analog Signal: A signaling method that modifies the frequency by amplifying the strength of the signal or varying the frequency of a radio transmission to convey information. Bandwidth The amount of data passing through a connection over a given time. It is usually measured in bps (bits-per- second) or Mbps. Broadband Broadband refers to telecommunication in which a wide band of frequencies is available to transmit information. More services can be provided through broadband in the same way as more lanes on a highway allow more cars to travel on it at the same time. Broadcast To transmit (a radio or television program) for public or general use. In other words, send out or communicate, especially by radio or television. Cable A strong, large-diameter, heavy steel or fiber rope. The word history of cable derives from Middle English, from Old North French, from Late Latin capulum, lasso, from Latin capere, meaning to seize. Calling Party Pays A billing method in which a wireless phone caller pays only for making calls and not for receiving them. The standard American billing system requires wireless phone customers to pay for all calls made and received on a wireless phone. -
750 Review Insert
The Eton Elite 750 is much more than just a fancy-looking boom-box shortwave receiver, reports WB6NOA, who listened to all it has to offer, including longwave, shortwave, the AM and FM broadcast bands, and the VHF air band. CQ Reviews: Eton Elite 750 Shortwave Receiver BY GORDON WEST,* WB6NOA s ham operators, we know not to pre-judge a radio by just how it Alooks, or how many buttons and meters it may have on the face. Like many of you, I have a collection of no- name bargain mail-order portable shortwave (SW) receivers, but few can hold a candle to those from name-brand manufacturers. Now, this monster- sized Eton receiver is hitting the mar- ket in grand style. The Eton Elite 750 is major-sized multi-mode receiver, fun for a radio enthusiast wanting to tune in what’s out there from 100 kHz to 30 MHz, plus the AM and FM broadcast bands and AM air-band reception. The Eton name may be unfamiliar to you, and the 750 looks a lot like a pre- vious radio from Grundig. Actually, the two companies have a relationship that spans 35 years, as explained by Eton CEO and Chairman Esmail Amid- The large speaker makes the Eton Elite 750 a great poolside or beach enter- Hozour. “From our initial partnership tainment radio, too! Plenty of audio output, enough to also power a personal with Max Grundig in 1979, Eton has car- music player that can plug in. ried on Grundig’s 75+ year legacy in developing the best-in-class world band we bring new and exciting shortwave non-directional radio beacons (NDBs), radios.” Esmail continued, “Eton’s dedi- products to the market each year.” Navtex, 630-meter ham radio CW bea- cation to design and innovation spans cons, and various government stations partnerships with Drake to ensure high- Exploring the Elite 750 lurking down here. -
Electrical and Electronic Measurements
Contents Manual for K-Notes ................................................................................. 2 Error Analysis .......................................................................................... 3 Electro-Mechanical Instruments ............................................................. 6 Potentiometer / Null Detector .............................................................. 15 Instrument Transformer ....................................................................... 16 AC Bridges ............................................................................................. 18 Measurement of Resistance ................................................................. 21 Cathode Ray Oscilloscope (CRO) ........................................................... 25 Digital Meters ....................................................................................... 28 Q–meter / Voltage Magnifier ................................................................ 30 © 2014 Kreatryx. All Rights Reserved. 1 Error Analysis Static characteristics of measuring system 1) Accuracy Degree of closeness in which a measured value approaches a true value of a quantity under measurement. When accuracy is measured in terms of error : Guaranteed accuracy error (GAE) is measured with respect to full scale deflation. Limiting error (in terms of measured value) GAE * Full scale deflection LE Measured value 2) Precision Degree of closeness with which reading in produced again & again for same value of input quantity. 3) Sensitivity