OWNER'S GUIDE
Your 77-857 is a versatile, professional quality transceiver and we strongly suggest that you read
this Owner's Guide carefully before operation so that you may receive full benefit from its many
features.
OPERATING CONTROLS CONNECTORS AND THEIR FUNCTIONS
VOLUME CONTROL/POWER SWITCH
This turns the power on or off.
This controls the sound output from the speaker when receiving or from the public address (PA)
speaker connected to the PA jack on the rear panel. The volume control does not affect transmitting
output.
PA/SQUELCH CONTROL
This transceiver has been equipped with a simple PA (Public Address) amplifier system. When operat-
ing the transceiver as a PA, place the control in the PA (fully counter-clockwise) position and connect
a suitable 8-16 ohm PA speaker to the EXT. CB/PA Jack on the rear panel. Press the Push-to-Talk bar
on the microphone and talk into the microphone, then your voice will be heard from the PA speaker.
For regular 2-way communications, turn the control clockwise. Further turning operates the squelch
and quiets the receiver when signals are not being received and allows a quiet standby operation. It
functions only in the receive mode and does not affect the receiver volume when signals are being
received.
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