Air Comm Systems ACS 300A-101 Instrukcja instalacji i obsługi - Strona 6
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ACS 300A-101 Installation and Operations Manual
Front Panel Controls
( See Figure 1 — Page 8 for pictorial )
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Description
The ACS 300A Dual Audio Mixer Panel is a compact, lightweight unit which provides full audio control
and ICS support for Pilot and Co-pilot or observer positions in the aircraft. It has the capability to
provide each user with 5 receive audio selections, 6 transmitter selections, Normal and HOT (Hands
Free) ICS, and full headphone audio and ICS volume control. In addition, an internal expansion slot
excepts a plug-in module (optional) which can give the unit an additional 6 positions of ICS capability, 2
of which also have TX capability.
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1- Norm - Emer Switch
This switch controls the operation of the audio panel in the event of an audio amplifier failure. In the
"up" position (NORM) the audio panel is in normal operating mode. In the "down" position (EMER) the
unit is in the emergency mode. During Emergency operation,with a receive audio switch in the"down"
position the mic select rotary switch selects the mic, key, and unamplified audio in the event of an
audio amplifier failure. The side in emergency mode will not have incoming ICS.
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2 - Receive Audio Select-Mute Switches
Normal operation - In the "up" position the audio selected is summed with any other audios selected
into the headphone amplifier. It also selects or mutes cross sidetone. In the "down" position the audio
selected is muted. Cross sidetone is also muted.
Emergency operation - In the"down" position the mic select rotary switch selects the mic, key, and
unamplified audio in the event of an audio amplifier failure. The side in emergency mode will not have
incoming ICS.
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3 - Volume Controls
These concentric knobs adjust headphone volume. The larger one adjusts the radio volume while the
smaller one adjusts the intercom (ICS) volume. Clockwise rotation increases the volume - counter
clockwise rotation decreases the volume. To set volume, transmit on the radio and set the sidetone
level slightly on the low side so you will have a tendency to talk up and have higher modulation. Then
set the radio volume for comfortable listening. In the event of excessive or inadequate receiver volume
the pots located on the rear of the unit may be adjusted for the proper level. (see Figure 2 on page 8)
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4 - Lighting
The audio panel is lit by NVG lamps filters which provide night time visibility for all panel legends.
They can be connected to a dimmer bus for adjustment.
Air Comm Systems, Inc.
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