PS Engineering PMA7000M-S Installation Manual - Manual (Page 21)

PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-070-0012 Page 3-2 Rev. 12, Sept.2000
Turning the mic selector fully counterclockwise places the pilot and copilot on Com 3. Com 3 receive audio
is automatically placed in the headset (and speaker if selected). Com 1 and/or Com 2 receiver audio can be
selected to monitor those transceivers.
The PMA7000M-S-Series has an automatic selector mode. Audio from the selected transceiver is automati-
cally heard in the headsets and speaker. You can check this function by switching from C
OM 1 to C OM 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 the mic selector rotary switch from C OM 1 to C OM 2, while C OM 2 audio had been se-
lected, 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 C OM 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.
The “TEL” position, fully CW on the mic selector switch, is the pilot’s “hook” switch, when the system is
interfaced to an appropriate approved wireless telecommunication system, such as the AirCell system.
Placing the mic selector in TEL placed the pilot microphone and headphones on the cellphone. The pilot
PTT will switch the pilot mic to the COM 1, and allow continued aircraft communications as well.
The copilot will also be able to transmit on COM 1 with his PTT as well.
NOTE: Placing the mic selector switch in the TEL position 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.
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 annunciator in the lower right corner of the unit
will illuminate, indicating that the Mic Selector switch position is no longer current. 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 Audio Selector (All models)
Receiver audio is selected through two momentary and six latched, push-button, backlit switches. Com 1
and Com 2 are the momentary switches.
Because the rotary microphone selector switch controls what transceiver is being heard, the Com l and Com
2 push-buttons are of the momentary type and do not remain in when selected. This is also part of the "auto”
function. You will always hear the audio from the transceiver that is selected for transmit by the rotary mic
selector switch.
The users can identify which receivers are selected by noting which of the green switch LEDs are illumi-
nated. Push buttons labeled Nav 1, Nav 2, DME, MKR (Marker), ADF, AUX (auxiliary), and SPR
(Speaker) are "latched" type switches. When one of these buttons is pressed, it will stay in the "in" position.
Press the switch again and it be in the "out" position and remove that receiver from the audio.
3.4.1 Speaker Amplifier
The "SPR" in the push-button section stands for speaker. This switch will place all selected audio on the
cockpit speaker when this switch is selected. NOTE: Except for the unswitched audio, the speaker amplifier
is not active in the "Split Mode."
Unswitched audio, (autopilot disconnect, altimeter warning, etc.) will come through the speaker regardless
of the speaker button position.