During retransmit operations, two radio sets (stations 1 and 2) beyond normal communications range
perform transmit/receive (T/R) operations using an unattended two-way relay station. The relay
station is made up of two radio sets in retransmit (RETRAN) mode coupled together. The radio sets
related station 1 and 2 radio set frequencies. The first radio set of the relay station receiving a signal
from either station 1 or 2, automatically sends the signal to the second radio set which relays the
signal to the opposite station.
To operate satisfactorily, the two radio sets of the two-way relay station must be tuned to
frequencies at least 3 MHz apart. When they are spaced greater than 8 feet apart, the
frequency spacing may be decreased.
Transmitter power output should be selected, 1 watt or 10 watts, depending upon
distance between relay station radio sets.