Standard C828M - Busy Indicator Lamp; Repeater Offset Oscillator

5. Use of Repeater Offset Oscillator
The transceiver is provided with 3 offset oscillators including one for Simplex.
Crystals are bullt in the fi rst offset oscillator (22.0 MHz) for simplex and the second
offset oscillator (21.4 MHz) for REPEATER A position, while the third offset oscil
lator for REPEATER B position is provided with a crystal socket so that a system
other than repeater system, whose transmit frequency is deviated 600 kHz from the
receive frequency, can be used. When the transceiver is used in the simplex mode,
set the toggle switch on the front panel to the " S " position. The first offset oscil
lator (22.0 MHz) is operated and the transmit and receive frequencies become the
same.
With the switch set to REPEATER position A, the second offset oscillator (21.4
MHz) is operated and the transmit frequency is lowered to 600 kHz below the re
ceive frequency; thus, changeover to the repeater Channel can be accomplished by
one finger action. The frequency used for the first local oscillator for the repeater
Channel is therefore referred to the receive frequency (see "Ordering the Crystal
Oscillator Element).
6. "Busy" Indicator Lamp
The green " busy " indicator lamp on the front panel turns off and on according
to the emitter voltage of Q307 which is varied by the ON/OFF Operation of the
squelch circuit. This indicator lamp, being independent of the audio Output, illumi-
nates in green to show that Signals are being received, even if the volume control
is turned down; and when in parallel use of the rigs for 50 MHz, 430 MHz and
others, the green lamp teils from which rig the signal is being received.
— 10