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Getting StartedDetailed Operation
6. Press MEM to save the displayed ID. Turn the Large knob to “Done” and press MEM.
The alphanumeric ID for a frequency is displayed only when looking at user stored frequencies using
the recall (RCL) feature. The stored frequency is displayed numerically once selected as the active or
standby frequency.
You can remove the ID for a frequency while retaining the frequency in User memory by setting all
characters to underscores and pressing MEM.
Intercom Function
When two headphone and microphone jacks are connected to the SL40, these headsets can be used
as a voice-activated intercom.
When you select the Intercom function with the installed selector switch, the intercom function is en-
abled. The Volume control will control the headphone listening level. The receive function will automati-
cally become active when a signal is detected, but the volume will be reduced during intercom activity.
A small “I” is displayed above and to the left of the “s” or “m” of the standby frequency to indicate the
Intercom function is selected.
The Microphone Squelch Sensitivity can be set in the System Functions.
Stuck Mic
The SL40 helps protect you from a situation where the microphone may get stuck in the ON or Trans-
mit position. If the microphone is keyed for longer than 35 seconds, the SL40 will return to the receive
mode on the selected frequency.
A flashing “Stuck Mic” message will display until the transmit key is released.
Note: In an emergency situation, if the “Stuck Mic” message remains after you have stopped
keying the mic, turn the power off and then back on. You will then get another 35 second time-
out period to transmit.
121.50 Stuck Mic
Stuck Mic Message
119.10 *s 121.50
Intercom Function is Selected
Intercom and Stuck Mic