Northern Airborne Technology 3110 - Manual (Page 57)

SM3110 Rev. 4.00 3110-100 Audio Control Panel Manual
3.3.4
INPH (Interphone) Volume Control
The INPH control is a rotary knob that provides cockpit interphone volume
adjustment.
When the knob is rotated cw the volume increases, and rotating it ccw
decreases the volume.
3.3.5 Navigation Filter Selection
The Navigation Filter Selection control is a three-position rotary switch used
to select one of three navigation filter modes - V, BOTH, or ID. The NAV1,
NAV2, ADF1 and ADF2 radios are routed through the filter.
When V is selected, the 1020 Hz notch filter ensures that voice only passes to the 3110-
100 outputs.
When ID is selected, the 1020 Hz band-pass filter ensures that only the identifier tone
passes to the 3110-100 outputs.
When BOTH is selected, the voice and ID filters are deactivated, and unfiltered audio is
allowed to pass to the 3110-100 outputs
3.3.6
ST (Sidetone) Volume Control
The Sidetone Volume Control is a rotary knob that provides adjustment of
sidetone volume for all transceivers.
When the knob is rotated cw the sidetone volume increases, and rotating it
ccw decreases the volume.
Note: This control does not adjust Interphone sidetone volume.
3.3.7 VOX Selection
The VOX control is a black, illuminated, push-on/push-off rotary knob that
is used to select VOX operation, and to adjust the VOX sensitivity.
When the VOX switch is pushed IN, the microphone link to the interphone output is
disabled except when the interphone key is pressed.
When the VOX switch is in the OUT position, the VOX function is enabled and the arrow
on the knob is illuminated. Rotating the control adjusts the VOX sensitivity. If the control
is in the fully ccw position (maximum sensitivity), the unit is in Hot-Mic (VOX minimum)
mode. To decrease the sensitivity, rotate the control cw.
Aug 25, 2005 Page 3-3
ENG-FORM: 806-0106.DOT
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