PS Engineering PMA7000M-S Pilot’s Guide User Manual

Page 5

PMA7000-Series Pilot Guide

While in the ISO (Isolate) mode, the copilot will hear Entertainment 1 while
the four passengers will hear Entertainment #2. The pilot will hear entertain-
ment 1, at a muted level. 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
conversation ceases.

When in the A

mode, pilot and copilot will hear Entertainment 1 input

while all passengers will hear the Entertainment 2 source. 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 enter-
tainment inputs. However, it is suggested 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.

1.1.2.2

Soft Mute and Soft Mute inhibit

The Soft Mute feature assures that the aircraft radio transmissions will not be
missed due to entertainment playing. When there is radio reception or inter-
com conversation, the music level is dropped to a low, or background level.
When the radio or intercom traffic ceases, the level gradually returns to nor-
mal.

The front panel ICS switch controls muting of entertainment source #1 (for
pilot and copilot). Pushing this button places the ICS in Karoake (or sing
along) mode, which inhibits the soft mute feature. This allows the music to
continue uninterrupted by intercom or radio traffic when cockpit workload is
appropriate. Pushing the button again will release the mute inhibit function.

The passenger music, source #2, can be placed in the Karoake mode if a re-
mote switch is installed in the aircraft. See wiring information for details.

1.1

Telephone Mode

(When interfaced with a Each intercom position has a "hook switch." The pi-
lot's hook switch is the "TEL" mode on the audio panel, the others are discrete
switches mounted adjacent to the headset jacks.

When the intercom is in ALL mode, the pilot can speak on the phone only if
the mic selector switch is in TEL position. All intercom positions will hear
the telephone conversation. If any passenger places his or her switch into the
“off-hook” position all passengers will also be heard on the phone. All will
hear selected audio. Com 1 audio is automatically heard in the headsets. The
pilot and copilot will have transmit capability on Com 1, simply by using their
respective PTT switch.

In CREW mode, the pilot and copilot are may use the telephone, with their

PMA7000-Series Pilot Guide

function, a switch is installed to connect the top connector, pin 18, to ground.
This places the pilot microphone on the speaker output (Pin W) when the PTT
is pushed. The copilot can continue to use the selected com radio.

We recommend that the switch transfer the audio from the cockpit speaker to
a cabin speaker for public address. This will prevent feedback.

1.4.2

Key “Click”

The PMA7000M-S is equipped with a “click” function that provides an aural
feedback to the user in addition to the tactile button push. This sound can be
enabled or disabled by simultaneously holding the COM 1 and COM 2 but-
tons in for at least 5 seconds. Any person hearing the radios will also hear the
key click.

Allow at least 20 seconds between turning the key click on and off.

1.5

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

Switching to Com 2/Com l will reverse the “Split Mode” radio selection. The
pilot will be on Com 2 and the copilot will be on Com 1.

Note:

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, particu-

larly 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.

1.5.1

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 copi-
lot positions. This permits intercommunication when desired between the
crew. Pressing the ICS button again disables this crew intercom function.