PS Engineering
PMA8000B-MP3Avidyne Version (-0403) Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0403
Page 2-6
Rev. 4, Jan. 2011
Connect the Split Com Selected (J1 pin 24) to the #1 and #1 IFD P1122 and 2122, pin 38. Connect the
Com 2 select (J1 pin 25) to the #1 and #1 IFD P1122 and 2122, pin 37.
On J2, connect Pin 20 (SWAP) to P1122 and P2122, pin 21.
If a DME is installed, connect it to Mon 1 input.
Refer to Avidyne Entegra installation manual for full interface details.
2.4.11 Public Address Mode
By pressing the Mute and SPR pushbuttons at the same time, the PMA8000B-MP3 will be placed into
public address (PA) mode. In this mode, the pilot will be talking over the cockpit speaker when he presses
his PTT switch. Copilot will still continue on the selected COM radio.
To enable the PA discrete Output located at the rear connector, the internal configuration jumper, J4,
MUST be placed across both pins in the header. This jumper is shipped as open from the factory. Contact
PS Engineering for details on changing this configuration jumper.
When this discrete Output is enabled, J2 Pin 19 will go low when in PA mode, providing a logic level that
can be used to incorporate a speaker-switching scheme. This 50 mA circuit (10Ω Z) can control a switch-
ing means such as a relay that would transfer the speaker output amplifier from the cockpit speaker to
drive another cabin speaker. If the PA mode is used with a microphone in proximity to an active cockpit
speaker, feedback might result.
2.4.11.1
Public Address Jumper
1.
Remove qty. 5 Phillip head screws from the PM8000B.
NOTE: THE SCREW IN THE REAR
OF THE PANEL IS A DIFFERENT LENGTH THAN THE OTHER FOUR. YOU MUST
PUT THE SHORTER LENGTH SCREW BACK IN THE SAME LOCATION OR
DAMAGE WILL OCCUR. See Figure #1.
Figure 2-2 Screw Locations
2.
Install the blue jumper located in the back corner near the sub-D connectors on
both
pins of J4.
See Figure #2-3.
Long shaft screws
Short shaft screws
