PS Engineering PMA7000B Pilot’s Guide - Manual (Page 8)

8
PMA7000B Pilot Guide
202-780-0001 R6
The front panel ICS switch controls muting of entertainment source #1 (for
pilot and copilot). Pushing this button places the ICS in Karaoke (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 func-
tion.
The passenger music, source #2, can be placed in the Karaoke mode if a
remote switch is installed in the aircraft.
Telephone Mode
The Com 3 input can serve as a full duplex interface for telephone systems
if the installation is correctly configured. PS Engineering does not guaran-
tee compatibility with all cellular or wireless telephone products.
When interfaced with an approved airborne telecommunications system,
the PMA7000B can serve as a audio control and distribution center. Each
intercom station should have a "hook switch." The pilot's hook switch is the
"Com 3" button on the audio panel, while the copilot and passengers are
discrete switches mounted adjacent to the headset jacks. When Com 3 is
active in the duplex mode, the TX button will blink about twice as fast as
the normal transmit rate.
The pilot can speak on the phone when the Com 3 is selected for transmit
(Com 3 Xmt button activated). In the All intercom mode, everyone hears
the telephone and selected radio audio. The pilot and copilot will have full
transmit capability on the selected transceiver Com 1 or 2, simply by using
their respective PTT switch. If any passenger places his or her switch into
the “off-hook” position, all passengers will then be on the phone.
In CREW mode, the pilot and copilot may use the telephone with their
respective hook switch (the pilot selects Com 3 on the Xmt selector). Pas-
sengers will not hear telephone or other radios. If the copilot is “off hook”
and the pilot is not, the copilot will the sole person on the telephone, and no
one else will hear the conversation, sort of a “phone booth.”
The pilot or any passenger who places their switch into the off-hook posi-
tion will then access to the phone. If one passenger is “off-hook” all four
passengers will enter the conversation.
In ISO intercom mode, when the PMA7000B is in the Com 3 mode, the
pilot position is in the "Phone Booth." He will also have access to Com 1
or 2, and will transmit on that radio using the PTT. All selected audio is
provided. If any other passenger goes “off hook” they will connect to the
phone.
Note: Because the telephone uses an intercom circuit, all stations on
that circuit will lose intercom capability when the telephone is in use.