PS Engineering PMA8000C Installation Manual - Manual (Page 23)

PS Engineering
PMA8000C Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0303 Page 3-2 Rev. 3, May 2014
In normal (not split) modes, the PMA8000C gives priority to the pilot’s radio Push-To-Talk (PTT). If the
copilot it transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard over the selected
com transmitter.
3.2.1.1 Split Mode
The split mode can be activated at any time by pressing the COM 1 and COM 2 OR COM 3 XMT buttons
at the same time. This places the pilot on COM 1 and the Copilot on COM 2 or COM 3. If COM 2 and
COM 3 XMT buttons are pushed, the pilot will be on COM 2, and the Copilot will be on COM 3.
Pilot on COM 2 or COM 3, and Copilot on COM 1 is not possible.
N O T E
Due to the nature of VHF communications signals, and the size constraints in general aviation aircraft, it is
probable that there will be some bleed-over in the Split mode, particularly on adjacent frequencies. PS
Engineering makes no warranty about the suitability of Split Mode in all aircraft conditions.
When the split mode is activated, the intercom between the pilot and copilot is inhibited, although the pas-
sengers can still talk among themselves. The crew intercom can be reactivated if desired by pressing the
“Mute” button. The indicator LED in the Mute button will be green when the intercom is off (muted), and
turn off to indicate that the intercom is not muted, and the crew can speak to each other, but not with the
passengers.
3.2.1.2 Swap Mode (Switch from COM 1 to COM 2 or COM 3 remotely)
With a yoke mounted, normally open momentary switch, the pilot can change from the current COM trans-
ceiver 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.
The PMA8000C can be configured by the user to either Swap COM 1/COM 2, or COM 1/COM 2/COM 3.
To change this function, press and hold the swap switch, and push and release the COM 3 RCV button mo-
mentarily. This feature is remembered when the unit is off.
3.2.1.3 Monitor Mode
The PMA8000C is equipped with a Monitor function, which allows a secondary com radio audio to be mut-
ed by the primary radio (selected for transmit). See
§3.10.2 for more information. This function is not
stored when the unit is turned off.
3.2.1.4 Stuck Microphone Protection (Units with serial number CC1026 and above)
The PMA8000C will sense if the pilot or copilot radio PTT remains keyed for more than 32 seconds. When
a stuck mic is detected, the key input is ignored, and the other crewmember can transmit normally. If the
stuck becomes ungrounded, normal operation is restored.
3.3 Audio Selector (4)
Communication audio from the other radio, not selected for transmit, can be heard by pressing the associat-
ed RCV button. You will always hear the audio from the selected transceiver.
Navigation receiver audio is selected through five momentary, push-button, backlit switches.
The users can identify which receivers are selected by noting which green switch LEDs are lit. Navigation
aid audio push buttons are labeled NAV 1, NAV 2, ADF and AUX (auxiliary). DME audio (if present) will
come through when the AUX button is selected. When one of these buttons is pressed, the mode is active,
and the LED will illuminate. Press the switch again and it will be "off" and remove that receiver from the
audio output.
Marker Audio (MKR) can be selected by pressing the MKR button for more than one second. (9) The
AUD LED will turn on when Marker Audio is selected.
In SPLIT mode, only the pilot will hear selected navigation audio.
3.4 Bluetooth® Telephone
The Bluetooth telephone feature serves as a full duplex interface and distribution for Bluetooth enabled