Garmin SL10 User Manual
Page 10
UPS Aviation Technologies
SL10 Series Audio Selector Panel and Intercom System
User’s Guide
Page 6
1.5.5.1 Soft Mute (Mono)
Soft Mute must be enabled during installation by jumpering top
connector pins 12 and N. A SPST switch can be installed between these
pins for a pilot selectable mute mode. Without this connection, music is
not muted during intercom activation. This “Karaoke Mode” prevents the
music muting when a sing-along is desired. "Soft Mute" mode only
applies to entertainment input #1. Entertainment #2 does not mute.
1.5.5.2 Soft Mute (Stereo)
Both entertainment devices have the "Soft Mute" mode. In units earlier
than a “G” intercom board serial number (second set of numbers), only
entertainment input #1 has the mute inhibit capability. "Soft Mute" mode
for the Crew positions (Entertainment 1) can be selected by pressing in
the Volume control knob once. In later units the SQL knob controls the
Soft Mute of the passengers entertainment (#2).
1.5.5.3 Entertainment Input
The audio selector panel has provisions for up to two separate
entertainment input devices. Which device is heard is determined by the
position of the three position mode switch located in the center of the
intercom section of the audio panel. (See Table 3-1 for overview.)
While in the ISO (Isolate) mode, only the copilot and the four passengers
will hear entertainment device #1. In normal operation, whenever a
person speaks or if the aircraft radio becomes active, the music will
automatically mute and then will gradually return to the original listening
level when the intercom or radio activity ceases.
Which entertainment device will be heard is determined by the mode
selector switch. When in the A
LL
mode, all parties will hear the
entertainment input #1. While in the C
REW
mode, pilot and copilot will
hear entertainment input #1 while the passengers may listen to
entertainment input #2.
It is also possible to use only one entertainment input device for both
entertainment inputs. 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 decide if they hear entertainment
while in the Crew mode.