Installation manual

UPS Aviation Technologies
SL10 Series Audio Selector Panel and Intercom System
Installation Manual
3-2
In SL10-series units, Serial Number T03092 and above, when switching the mic selector rotary switch
from C
OM 1 to COM 2, while COM 2 audio had been selected, Com 1 audio will continue to be heard. This
eliminates the pilot having to switch Com 1 audio back on, if desired.
When switching from C
OM 1 to COM 2 while Com 2 has NOT been selected, Com 1 audio will be switched
off. In essence, switching the mic selector will not effect the selection of Com audio.
Important: When the mic selector is in the full counter clockwise position, the SL10 power is removed,
and it is in the FAIL-SAFE mode. The pilot headset and microphone is connected directly to Com 1.
3.3.1 Swap Mode (Switch from Com 1 to Com 2 remotely)
With a yoke mounted, momentary switch, the pilot can change from the current Com transceiver to the
other by depressing this switch. When "Swap Mode" is active, an LED annunciator will illuminate,
indicating that the Mic Selector switch position is no longer valid. To cancel "Swap Mode," the pilot may
either press the yoke mounted switch again, or turn the Mic Selector Switch to the Com that is active.
3.4 Split Mode
Turning the rotary switch to C
OM 1/COM 2 places the SL10 into "Split Mode". This places the pilot on Com
1 and the copilot on Com 2. Pilot and copilot are isolated from each other on the intercom, but can use their
respective radios simultaneously. An example of this useful feature is when the pilot may want to talk to
Air Traffic Control, while the copilot may be speaking to Flight Watch.
The "Split Mode" radio selection can be reversed by switching to C
OM 2/COM l. The pilot will be on Com 2
and the copilot will be on Com 1. A third "Split Mode" selection is TEL/COM l. This will place the pilot on
airborne radiotelephone, HF or other transceiver (if installed), while the copilot will be on Com 1.
Note: In all SL10s, Split Mode turns off all other (Nav, ADF, etc.)selected audio to pilot and
copilot. Additionally, there is no intercom function between pilot and copilot. Passengers still have
intercom capability among themselves.
3.5 Intercom
3.5.1 Volume Control, Monaural (SL10M SL10)
The pilot volume control knob adjusts the loudness of intercom and
music in the pilot’s headphones only. It has no effect on selected
radio audio levels. The copilot volume control adjusts the loudness
of the intercom and music in the copilot headset only. The
passenger volume is factory set at a comfortable level. This is a
service adjustment that can be accessed by the avionics technician.
Most general aviation headsets have a built-in volume control, so
volume can be adjusted “locally.”
3.5.2 Volume Control, Stereo, (SL10S, SL10MS)
The volume control knob adjusts the loudness of the intercom and
music for the pilot and copilot only. It has no effect on selected
radio levels or passengers' level. The passenger volume level is
factory set for a comfortable listening level. Most general aviation
headsets today have a built-in volume controls, therefore, volume
can be adjusted at the headset. There is a service adjustment that
can be accessed by the avionics technician. This will allow
adjustment of the passenger's volume for a comfortable listening
level.
Figure
3
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3
Volume Controls
Figure 3-4 Volume Control Stereo