Hi Cut/Off; To Transmit/Receive; Multi-Function Meter - Uniden Bearcat PC78LTX Owner's Manual

3. Release when finished.
To prevent acoustic feedback, separate the microphone from the speaker
when operating the PA at high output levels.
If you are in PA mode but not pressing PTT, the radio receives CB
transmissions and transmits them through the PA speaker. You cannot
respond to the transmission.

HI CUT/OFF

The Hi Cut function reduces high frequencies. Switch to HI CUT to turn
off higher frequencies.

TO TRANSMIT/RECEIVE

Perform a voltage Standing Wave Ratio (SWR) measurement prior to using
the transmitter. An SWR ratio in excess of 2:1 may damage the transmitter.
Be sure to read and understand Part 95, FCC Rules and Regulations before
operating your transmitter.
1. Select a channel.
2. Adjust MIC GAIN.
3. When the channel is clear, press the microphone PTT and speak.
4. Release PTT when you are finished speaking to listen for the
response.

MULTI-FUNCTION METER

SWR Meter: Measures the standing wave ratio (SWR) of the antenna. Use
this meter to check the antenna system or to adjust your antenna to the
proper length.
To Measure SWR:
1. Set the meter switch to CAL.
2. Press and hold microphone PTT switch (Transmit).
3. Calibrate meter with SWR CAL knob by adjusting the needle to
the ▼ mark.
4. Move the meter switch to the SWR position while pressing the
microphone PTT switch.
5. Release the PTT switch.
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