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Squelch Adjustment
10
Squelch Adjustment
Squelch
The squelch adjustment is important to ensure the
receiver audio is muted when no signal is present. You
want to set the squelch adjustment for the highest set-
ting without squelching the incoming signal.
To set the squelch control:
a. Turn the transmitter OFF.
b. Listen to the receiver audio on the speaker or head-
phone. Turn the audio level down in the begin-
ning.
c. Adjust the squelch adjustment clockwise until the
squelch LED goes off (not illuminated). You will
hear radio noise now. This is the audio you want to
squelch (mute) when the transmitter is off.
d. Now adjust the squelch setting counter clockwise
until it squelches (mutes). This is the minimum
squelch setting.
e. Now turn the transmitter on. Adjust the squelch
setting counter clockwise until the unit squelches.
This is the maxium squelch theshold. Please note
that if you are close to the transmitter, you may not
be able to find the maxium squelch threshold due to
the high RF signal of the transmitter.
f. Set the squelch adjustment between the maximum
and minimum squelch thresholds, keeping the fol-
lowing in mind.
· Minimum squelch threshold. By adjusting the unit
near this threshold, you will maximize the probabili-
ty the unit will NOT squelch when the transmitter
is on. However, you also run the risk having the
unit NOT squelched (and resulting radio noise
coming through the system) when the transmitter is
off. You may experience unsquelching of the
receiver by interference as well.
· Maximum squelch threshold. By adjusting the unit
near this threshold, you will greatly increase the
chance the unit will squelch when the transmitter is
off AND you will minimize the probability that the
unit will be unsquelched by interference. However,
you are also increasing the chances that the signal
coming from the transmitter will be squelched.
Thus, if the RF signal from the transmitter dips just
slightly (someone walks in front of the antenna),
you will experience momentary squelching of the
audio.
CAUTION: Ensure proper setting of the squelch
adjustment to prevent user ear damage and unwanted
radio noise. Users will find unsquelched receiver noise
very objectionable.