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How Many Types of Radio Wave?

The lowest frequency portion of the electromagnetic spectrum is designated as “radio,” generally considered to have wavelengths within 1 millimeter to 100 kilometers or frequencies within 300 GHz to 3 kHz. There is a wide range of subcategories contain

Posted on:11-20 View:331
What are the abbreviations of radio data system？

RDS has been successfully in use for many years,. However there are many RDS acronyms or abbreviations that are used with RDS. The RDS acronyms can be confusing as they are not always mentioned in the literature associated with a particular radio, or the i

Posted on:11-19 View:259
How to make the simple DIY FM dipole antenna design

To make the simple DIY FM dipole antenna, only a few items are needed. Typically these will be: 1、Twin flex - twin mains flex is idea but we used some old speaker flex. 2、Tie wrap - to secure the centre of the dipole and prevent the flex opening out beyond what is needed.

Posted on:11-15 View:537
How To Calculate VSWR

There are many different formulas or equations that can be used to calculate VSWR from a variety of different parameters. As VSWR is an important aspect associated, especially with feeders and antennas, it can be helpful to know the different relationships and formul

Posted on:11-13 View:412
How Does RDS Work？

How to perform sophisticated network following? This was about the signalling which the broadcaster can add to his program. Let us have a focus on the receiver. To reduce it to one sentence: The receiver should be able to perform the best reception u

Posted on:11-12 View:220
What Does RDS Stand For?

"RDS" stands for "Radio Data System" and it allows FM broadcasters to send far more than just an analog audio signal out over the air waves. Using a 57 kHz "subcarrier," stations can transmit digital RDS data for reception by RDS-e

Posted on:11-12 View:352
How to Calculate Voltage Standing Wave Ratio?

For a radio (transmitter or receiver) to deliver power to an antenna , the impedance of the radio and transmission line must be well matched to the a ntenna's impedance . The parameter VSWR is a measure that numerically describes how well the antenna is impe

Posted on:11-09 View:655
How to Expand The Two-Way Radio Range

One of the most persistent challenges of using two-way radios (walkie-talkies) is moving out of two-way radio range and cutting off your conversation. You can’t fight physics – under specific conditions, radio signals travel in highly specific ways. If you violat

Posted on:11-08 View:288
Single Frequency Networks (SFN) in Digital Terrestrial Broadcasting

Introduction The transmission channel (path) for the terrestrial TV broadcasting is commonly and rightfully considered as the worst quality channel. Terrestrial transmission channel is asubject to many influences - additive noise and other disturbing signals (namely in the municip

Posted on:10-18 View:272
Single Frequency Network（SFN）& DAB

SFN - Single Frequency Network A Single Frequency Network (SFN) is a network of transmitting stations that use the same frequency to transmit the same information. A Single Frequency Network is a means to extend the coverage area without the use of

Posted on:10-17 View:381

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