UPS Aviation Technologies Apollo SL10, Руководство по установке

Страница: 10 / 30

UPS Aviation Technologies
SL10 Series Audio Selector Panel and Intercom System
Installation Manual
2-3
2.4.2 Entertainment Input
2.4.2.1 Monaural (SL10, SL10M)
Two entertainment devices (CD player, cassette player, etc.) can be connected to the unit. Install two 1/8-
inch stereo jacks in a convenient location so that the pilot can plug in the entertainment devices into the
system.
For a stereo input, we recommend tying the left and right channels (tip and ring) together, so both stereo
channels are provided to the monaural audio panel, and the audio amplitude available to the audio panel is
increased. Audio signal at the entertainment input must be a minimum of 500 mV P-P for optimum music
performance. We have noticed that the portable devices using 4 batteries seem to work better than the 2-
cell types. Also we have found that some cigarette-lighter adapters introduce noise into the system due to
the dropping power supply.
NOTE : The Soft Mute must be enabled in the SL10, SL10M either by
connecting top connector pins N and 12 together in the harness, or through an
external Soft Mute Enable switch.
2.4.2.2 Stereo (SL10S, SL10MS)
Two stereo entertainment devices (CD player, cassette player, etc.) can be connected to the unit. Install two
1/8-inch stereo jacks in a convenient location so that the pilot can plug in the entertainment devices into the
system. The audio signal at the entertainment input must be a minimum of 500 mV P-P per channel for
optimum music performance. We have noticed that the portable devices using 4 batteries seem to work
better than the 2-cell types. Also we have found that some cigarette-lighter adapters introduce noise into the
system due to the dropping power supply.
2.4.2.3 Soft Mute
The SL10-system incorporates a "Soft Mute" system. This will mute the entertainment devices during ICS
or radio traffic. While in the ALL or ISO modes, entertainment #1 is heard by everyone (except by the pilot
in ISO mode). While in the CREW mode, pilot and copilot will hear entertainment #1 while the passengers
will hear entertainment #2.
Entertainment inputs #1 and #2 can be paralleled so a single entertainment source can serve both the
passengers and the crew in "crew" mode. It is suggested however, that a switch (DPDT) be installed
between the single entertainment device and entertainment input #1. This will allow the pilot and copilot to
decide if they hear entertainment while in the Crew mode.
Local oscillators and internal signals from some entertainment equipment can cause undesired interference
with other aircraft systems. Before takeoff, operate the entertainment devices to determine if there is any
adverse effect within the aircraft systems. If any unusual operation is noted in flight, immediately switch
off the entertainment devices.
NOTE : Use the low level output of any entertainment device to connect to the
audio panel. Maximum signal level is 2 VAC p-p. DO NOT use a speaker-level
output, this will cause internal damage in the audio panel.
To use a line level, install an AudioLink PowerLink 101PL2 adapter, available
from Crutchfield at 1-800-955-3000
(804)-817-1000, sales@crutchfield.com
2.4.2.4 Soft Mute (Stereo only)
Entertainment #1 input has a "Soft Mute" inhibit switch that is part of the volume control located on the
front panel. By pressing it once, the entertainment device will not be muted, push it again and it will be
muted by intercom and radio conversation.
On SL10 stereo units with serial numbers above “G” series on the intercom board (second set of serial
numbers) have an Entertainment #2 Karoake mode capability. This "Soft Mute" inhibit switch is part of the
squelch control located on the front panel. By pressing it once, the entertainment device will not be muted,
push it again and it will be muted by intercom and radio conversation.