UPS Aviation Technologies
SL10 Series Audio Selector Panel and Intercom System
User’s Guide
Page 4
accessed by the avionics technician. Most general aviation headsets have
a built-in volume control, so volume can be adjusted “locally.”
1.5.2 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.
1.5.2.1 Mono headsets in Stereo Installation
All passenger headsets are connected in parallel. Therefore, if a monaural
headset is plugged in to a SL10 Stereo installation, one channel will be
shorted. Although no damage to the unit will occur, all passengers will
lose one channel.
1.5.3 Adjusting the VOX-Squelch control, Monaural (SL10,
SL10M)
The
SL10 provides adjustable VOX squelch controls for the pilot and
copilot (the copilot's VOX control also adjusts the passengers VOX
squelch) Since the number of microphones open at any one time is
reduced, the amount of background noise is diminished. This also allows
the use of dissimilar headsets with the same intercom. The user can
adjust the trip level of the VOX to fit the individual's voice and mic,
which helps eliminate the frustration of clipping the first syllables.
With the engine running, set the VOX control knob by slowly rotating
the S
QL
control knob clockwise until you no longer hear the engine noise
in the headphones. When the microphone is positioned properly near
your lips, normal speech levels should open the channel. When you have
stopped talking, there is a delay of about ½ second before the channel
closes. This helps prevent choppy communications.
Figure 4 Volume Control Stereo