PS Engineering PMA7000CAP Installation Manual User Manual

Page 20

PS Engineering

PMA7000M-S Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual for Civil Air Patrol

200-072-0004

Page 3-3

Rev. 4, Sept. 2000

3.5 Split Mode

Turning the rotary switch to C

1/C

2 places the PMA7000M-S into "Split Mode." This

places the pilot on Com 1 and the copilot on the Com 2 transceiver. An example of this useful
feature is when the pilot may want to talk to Air Traffic Control, while the copilot/observer may
be speaking to the Flight Watch. Although this mode has limitations (see below) we believe you
will find this to be a useful feature.

Switching to Com 1/Com 3, the pilot will be on Com 1 and the copilot will be on Com 3. In
Com 2/3, the pilot is on Com 2, and the copilot on Com 3. The split mode is reversed by the
swap button (see section 3.5.2).

Note :

Due to the nature of 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.

Note: Split Mode does not turn off other (Nav, ADF, etc.) selected audio to pilot. However, the copilot will

only hear the selected communications receiver.

3.5.1 Split Mode ICS

In split mode, the pilot and copilot are usually isolated from each other on the intercom,
simultaneously using their respective radios. Depressing the ICS button in Split Mode will
activate VOX intercom between the pilot and copilot positions. This permits intercommunication
when desired between the crew. Pressing the ICS button again disables this crew intercom
function.

3.5.2 Swap Mode

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is no longer current.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.

In the PMA7000MS CAP version the swap mode can be used to reverse transceiver selection
in the split mode. If the mic selector is in the Com 1/2 mode, pressing the SWAP button will
place the pilot on com 2 and the copilot on com 1.