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What is an example of a radio communication system?

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Unlike cell phones, radios don't require monthly subscriptions or per-call charges. In the United States, two-way radios are regulated by the Federal Communications Commission (FCC) and use the Ultra High Frequency (UHF) and Very High Frequency (VHF) frequency bands. UHF radio uses line-of-sight communication and repeaters. They provide better reception than CB radios, which can use either HF 27 MHz or UHF 477 MHz. VHF radios are mainly used in marine applications and emergency personnel. VHF/UHF two-way radios are also available. Radio accessories include:

 

two-way antenna

UHF Connector

battery charger

external GPS receiver

 

Two-way UHF radios use the Family Radio Service (FRS) and/or General Mobile Radio Service (GMRS). In the US, FRS radios use 14 channels (1-14) and do not require an operator license. They have a maximum power level of 0.5 mW and a relatively short range. FCC regulations prohibit user modification of the FRS radio transceiver and FRS antenna. The GMRS radio uses eight dedicated channels (15-22) and requires an FCC carrier license. They have a greater range than FRS radios and can be equipped with antennas to extend their range. Most GMRS radios are rated at 1.0 to 5.0 W, with a maximum allowable power level of 50 W. FRS/GMRS hybrid or dual service radios provide access to both FRS and GMRS frequency bands. They can operate without an FCC license if only using the FRS channel.

 

 

Specification

 

Radios vary in performance specifications and features. The CB radio has 40 channels, squelch or mute function, public address (PA) switch, purifier, and circuitry to reduce radio frequency (RF) gain. UHF radios vary in range, usually measured in miles or kilometers.

 

Premier cables are RF resistant, high bend test capable, and have strain relieved connectors. Premier Cable makes the job fast, easy and reliable.

Huawei RET AISG to DB9 cable

MDR26 to RJ45 alarm cable

RET control cable male DB9 to female AISG connector

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