PS Engineering PMA7000B Spezifikationen PDF herunterladen (Seite 16)

PS Engineering

PMA7000B Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

200-780-0005 Page 2-9 Rev. 11, February 2015

2.7 Communications Antenna Installation Notes

For best results while in Split Mode, it is recommended that the one VHF communications antenna is locat-

ed on top of the aircraft while the other communications antenna is installed on the bottom. Any antenna

relocation must be accomplished in accordance with AC 43.13-2A, aircraft manufacturers’ recommenda-

tions and FAA-approved technical data.

Warning:

It is probable that radio interference will occur in the split mode when the frequencies of the two air-

craft radios are adjacent, and/or the antennas are physically close together. PS Engineering makes no

expressed or implied warranties regarding the suitability of the PMA7000B in Split Mode.

2.7.1 Telephone Hook Switches

While the Com 3 button acts as the hook switch for the pilot, additional hook switches must be installed to

have full access to the cell phone system. The copilot hook switch is a SPST switch that connects pin L of

J2 on the PMA7000B to ground to place the copilot mic audio on the Com 3 audio in duplex mode for cell

phone operation.

PMA7000B J2, pin M is the passenger hook switch. Install a SPST switch in a location adjacent to each

passenger headset where cell phone use is desired. When pin M is connected to ground through any switch,

the passenger microphones are all on the Com 3/duplex system.

The hook switches are not active or required unless the audio panel is in Com 3 /Duplex mode, with pin J,

J2 grounded.

The wireless communication “tel” system utilizes an intercom loop. Therefore, any time the cell phone is in

use from the pilot or copilot side, pilot and copilot will lose intercom capability. In the ALL mode, when the

passengers’ activate the cell phone, the pilots will have intercom, and continue to hear and transmit over the

avionics normally. However the passengers will not have intercom, because they are on the telephone.

See section 2.4.14 for alternative connection for the hook switches.

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PS Engineering PMA7000B Spezifikationen Seite 16