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To set the squelch control:
a.Turn the transmitter OFF.
b.Listen to the receiver audio on the speaker or headphone. Turn the audio level down in the beginning.
c.Adjust the squelch adjustment clockwise until the squelch LED goes off (not illumi- nated). 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 following in mind.
i.Minimum squelch threshold. By adjusting the unit near this threshold, you will maximize the probability the unit will NOT squelch when the transmit- ter 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.
ii.Maximum squelch threshold. By adjusting the unit hear 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 radio noise very objectionable.
LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West, Suite A Sandy, Utah
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