ASL INTERCOM PS 6379 MK2 User Manual page 10

Momentary switching:
If a TALK button is pushed and held, the microphone signal is sent to the referring inter-
com channel until the button is released.
Latched switching:
If a TALK button is pushed shortly, it is electronically latched and the microphone signal is
sent to the referring intercom channel.
If pushed again, the TALK button switches off. For each channel the latch function can be
disabled by changing the position of certain DIP switches (see section 11.0, DIP switch
group E). The TALK button is then "momentary only".
2 CALL button
To activate the call system, for each channel separately. By a momentary push a visual
CALL signal is sent to all stations connected to the referring intercom channel and the call
LEDs start flashing. By holding the CALL buttons for 2 seconds the buzzers are activated,
provided there is no buzzer mute status on that channel. After the CALL button is released
the LEDs continue to flash for a further 2 seconds. The CALL function of a channel in IFB
mode is automatically disabled.
3 NULL ADJUST trimmers
With these trimmers (one set for each channel) one may minimize the speaker feeding
back into the gooseneck microphone (unit feedback) and for minimizing the headset mic
feeding back into the headset can(s); the LOW trimmer is for all frequencies, the HIGH
trimmer solely for the high frequencies.
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