User Manual

TR-800 Service Manual
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Glossary
Bi-directional Repeater:
A repeater configuration in which the main and slave radios perform both receive and transmit functions.
The audio and Rx Carrier signals from the receiver of the slave radio are routed to the transmitter of the
main radio. Unlike the unidirectional case, though, the audio and Rx Carrier signals of the receiver of the
main radio are also routed to the transmitter of the slave radio.
Cross band repeater:
A repeater in which the slave radio operates in a different frequency band than the main radio. Example:
the slave radio operates on 162.075MHz in the high band VHF and the main radio operates on
452.025MHz in the 450-470MHz UHF band. Cross-band repeaters may be either unidirectional or
bi-directional.
Main Radio:
The radio that performs the transmitting functions in the TR800 repeater station in the general
unidirectional application.
Relay Delay Time:
The time duration the repeater remains in transmit mode after an active or valid signal is no longer
detected.
Repeater Knockdown:
To deactivate a repeater or to remove it from service. Only the slave radio turns on at power up.
Repeater Setup:
To activate a repeater or to place it into service. Both radios turn on at power-up (repeater functional).
Single band repeater:
A repeater in which both the slave radio operates in a same frequency band. Example: receive at
455.075MHz and transmit at 460.075MHz in the 450-470MHz UHF band.
Slave Radio:
The radio that performs the receiving functions in the TR800 repeater station in the general
unidirectional application.
Unidirectional Repeater:
A repeater configuration in which the slave radio receives signals only from the field radios and the main
radio transmits signals only to the field radios.