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Crossband Repeater System
A crossband repeater system enables system interoperability by changing frequencies between two radio systems. For applications where a radio user on one frequency band needs to communicate with other users in a different frequency band, a crossband repeater can convert the frequency between the two radios.
For example, a police department using VHF radio may need to communicate with the local fire department. Unfortunately, the fire department uses UHF radio equipment making it difficult for communications between departments. In this example, the crossband repeater receives a VHF signal from the police department; it then retransmits the signal on UHF to the fire department. Similarly if the crossband repeater receives a UHF signal from the fire department, it retransmits the signal on VHF to the police department. The system can also be configured to retransmit on UHF to its own users at the same time it retransmits on VHF and vice versa. Daniels crossband repeaters are capable of receiving and transmitting on any combination of frequency bands, AM, low band, VHF, UHF, and 800 MHz. With the P25 Digital versions of the Daniels radio the frequency bands are capable of operating in analog, P25 digital or mixed mode configurations. In Analog mode the radio system can be programmed for either wideband analog or narrowband analog operation. CTCSS or DCS operation can be programmed into the receiver and transmitter modules as well as selectable de-and pre-emphasis or flat audio operation. In P25 Digital mode the repeater will pass all clear and secure (encrypted) P25 digital information. NAC codes can be programmed into the receiver and transmitter modules or the system can be programmed to repeat any incoming signals with the NAC intact. Please see the following PDF application note(s) to view more information: AN400 Crossband Repeater System |
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