Radio Frequency Systems Specs

Listing Results Radio Frequency Systems Specs

Frequently Asked Questions

• What are the different frequencies of the radio spectrum?

  Frequency bands. The radio spectrum of frequencies is divided into bands with conventional names designated by the International Telecommunications Union (ITU): Frequencies of 1 GHz and above are conventionally called microwave, while frequencies of 30 GHz and above are designated millimeter wave.

• What are the limitations of low frequency radio?

  Below about 10 kHz (a wavelength of 30 km), elevated wire antennas kilometers in diameter are required, so very few radio systems use frequencies below this. A second limit is the decreasing bandwidth available at low frequencies, which limits the data rate that can be transmitted.

• What is the performance of RF cable?

  Most of the RF cable performance is frequency dependant. Professional RF test applications require higher accuracy for measurement results. High end cables are usually preferred in RF test and measurement applications.

• What are the applications of radio frequencies?

  Radio frequencies are generated and processed within very many functional units such as transmitters, receivers, computers, and televisions to name a few. Radio frequencies are also applied in carrier current systems including telephony and control circuits.

• What does ERRC stand for?

  Emergency Responder Radio Repeater (ERRC) provides emergency responder radio coverage. Do police / fire / ems workers have the ability to use their radio to communicate life saving information back to dispatch or to another emergency responder?

• When was the emergency responder radio coverage provision in the IFC?

  •First appeared in the appendix of the 2009 IFC, the provision was moved to the body of the code in 2012 •At present 12 states have adopted the 2012 edition of the IFC and 12 states have adopted the 2015 edition of the IFC •Section 1103.2 specifies the requirements for emergency responder radio coverage in existing buildings

• What is the minimum signal strength for emergency responder radio coverage?

  To be considered acceptable, the emergency responder radio coverage must meet the minimum signal strength measurement of -95 dBm in 95% of all areas of each floor of the building. Critical Area Coverage requires 99% coverage according to (NFPA 1221 9.6.7.4) coverage in Critical areas.

• What are the system requirements for ERRC?

  System Requirements ERRC shall utilize a bidirectional amplifier (BDA) with a distributed antenna system to achieve the required radio coverage. ERRC shall use a Class A channelized amplifier set up to only use MPSCS and UM radio channels. ERRC shall provide coverage on the 700 MHz and 800 MHz bands.