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1.3 Microphone (XMT) Selection (All models)
There are six pushbuttons associated with the communications transceivers. The
lower buttons control which transceiver is selected for transmit.
The SL15-CD gives priority to the pilot’s PTT.
If the copilot is transmitting, and the pilot
presses his PTT, the pilot’s microphone will be
heard over the selected communications trans-
mitter.
The SL15-CD has an automatic selector mode. Audio from the selected trans-
ceiver is automatically heard in the headsets and speaker (if SPR selected). You
can check this function by switching from C
OM 1 to COM 2 and watch the
selected audio light on the selector change from COM 1 to COM 2. This ensures
the pilot will always hear the audio from the transceiver he is transmitting on.
When switching 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 receiver audio.
When the duplex, or TELEPHONE mode is implemented, Com 3 becomes the
“TEL” position. This is the pilot’s “hook” switch, when the system is interfaced
to an appropriate approved wireless telecommunication system, such as the Air-
Cell system. Placing the mic selector in Com 3 places the pilot microphone and
headphones on the cellphone. The pilot PTT will switch the pilot mic to the other
selected com transceiver, and allow continued aircraft communications as well.
The copilot will also be able to transmit with his PTT as well.
NOTE
Placing the mic selector switch in the COM 3 –TEL– mode will disable pilot and
copilot intercom, as the intercom circuit is transferred to the telephone use. In
crew or ISO mode, placing the switch in TEL mode removes the passengers
access to the telephone.
1.3.1 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 (Com 1 or 2) to the other by depressing this switch. To cancel
"Swap Mode," the pilot may either press the yoke mounted switch again, or
select a different Com with the XMT buttons.
RCV
XMT