3Com SM69 red, Note, green, amber, VOX ICS, LIVE ICS, KEYED ICS, 3.3.2Intercom

SM69 Rev. 4.00 AA12S Series Compact Audio Controller Manual

3.3.1.3VOX/TX Annunciator

The VOX/TX Annunciator is a bicolour LED that indicates the intercom status.

During VOX activity, the annunciator LED is illuminated red. If TX is keyed with no ICS or sidetone, the annunciator LED is illuminated green. If TX is keyed with mic or sidetone, the combination of red and green will cause the LED to appear amber.

Note: If the LED is still illuminated green after transmission is concluded, this indicates a possible stuck mic.

3.3.2Intercom

ICS VOL/VOX Squelch Control VOX/TX Annunciator

The VOX and ICS VOL control is a fluted concentric knob, with the ICS volume on the centre knob, and the VOX control on the outer knob.

3.3.2.1VOX Control

The VOX control is used to set the level of audio required to activate the microphones.

The AA12S provides three modes of intercom operation, selected by the position of the VOX control.

LIVE ICS When the VOX control is positioned fully counter-clockwise (ccw), all mics will be live, and any sound picked up by the microphone(s) will be processed by the ICS system

KEYED ICS When the VOX control is positioned fully clockwise (cw), the intercom will be in a keyed-only mode.

VOX ICS When the VOX control is positioned between fully cw and fully ccw, the intercom is in VOX mode. To establish the VOX threshold, rotate the control ccw until the LED turns red, and then rotate the control cw until the LED goes dark. Continue turning the control cw until the desired voice sensitivity is set.

Oct 13, 2005		Page 3-3
ENG-FORM: 806-0106.DOT	Amendment #1	Oct 14, 2005

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