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GENERAL OPERATION
18
Setting Squelch Control
NOTE: This procedure sets the squelch level used for conventional calls
only. The squelch level for LTR calls is preset and not affected by this
adjustment. For more information on the various operating modes, refer
to page 38.
If conventional systems are programmed, the squelch level can be
set if the FCN option switch is enabled. Proceed as follows:
1. Select a conventional system and then a group that is not busy. Take the
microphone off-hook to enable monitoring.
2. Press the FCN switch and then rotate the Select switch as you would a
normal squelch control. Rotate it counterclockwise until receiver noise
is heard and then clockwise slightly past the point where the noise
mutes. The squelch adjust mode is indicated by “SQUELCH” on the
upper line of the display, and the relative squelch level is indicated by
a bar graph on the bottom line.
3. To select the current level and exit this mode, press the Select switch.
This also occurs automatically 2 seconds after no change is made or 8
seconds after no activity.
4. If both narrow and wide band channels are used, perform this adjust-
ment on both types because separate settings are maintained.
NOTE: Some readjustment may be required if weak messages are not
heard or unsquelching occurs when no messages are present.