Hilberling PT-8000A, Operating Manual

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20.2 ZERO-BEAT
Press and hold knob ZERO-BEAT will activate a 440 Hz
sinus tone in RX and TX mode, in FM mode there is a
1750 Hz sinus tone.
In RX mode the tone will be heard in both RX. The volume
might be adjusted by turning the knob.
In TX mode the tone will be transmitted with microphone signal.
Given both transmitting and receiving stations can activate a 440 Hz tone, an
interference might be heard in case both station vary in RX and/or TX
frequencies.
20.3 Microphone Sensitivity MIC (Gain)
Turning knob MIC (Gain) will adjust microphone
sensitivity.
When operating by microphone Hilberling T9 and in
normal mode of speaking the knob should be adjusted
between position clock 9 and clock 12.
The correct modulation can be monitored on the ALC display (see Page 57,
SSB mode only). If the yellow or red range is shown, the microphone sensitivity
should be reduced.
For preadjustment of microphone sensitivity see Page 17.
ALC display is only available in USB/LSB mode.
Pushing the knob will (de-)activate VOX functions (see next Page).
20.4 Compression TX Audio PROC
Pushing knob PROC will turn on and off microphone
processor.
Turning the knob will increase the processor level
(compression level).
Adjust not to exceed COMP limits shown on the COMP-meter (s. P. 57).
If PROC is active
PROC will be displayed (above S-Meter).
PROC is only available in USB/LSB mode.
Fig. 102
Fig. 101
Fig. 103