PS Engineering PMA5000EX Installation Manual - Manual (Page 22)

PS Engineering
PMA5000EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-550-0100 Page 3-6 Rev. 1 Jan. 2011
Crew
The volume changes about three steps per second, so it takes about 10 seconds to ramp the volume across
the full range.
It is possible to turn the volume completely off, so try pressing the volume up button if you don’t hear mu-
sic as expected.
3.9 Telephone Mode (9)
The TEL mode serves as a full duplex interface for compatible telephone systems such as portable cellular
phones with earpiece jacks. When interfaced with an approved airborne telecommunications system, the
PMA5000EX can serve as an audio control and distribution center.
In ALL intercom mode, all crew and passengers will be heard on the phone when they speak. All will
hear selected audio. Selected Com audio is simultaneously heard in the headsets. The pilot and copilot
will have transmit capability on the selected Com 1 or 2transceiver, simply by using their respe ctive PTT
switch.
In CREW mode, the pilot and copilot are connected to the telephone. The pilot and copilot will have
transmit capability on the other selected transceiver Com 1 or 2, simply by using their respective PTT
switch.
In ISO intercom mode, when the PMA5000EX is in the TEL mode, the pilot position is in the "Phone
Booth." Only the pilot will hear the telephone, and only he will be heard. He will al so have access to Com
1 or 2, and will transmit on that radio using the PTT. All selected audio is provided.
NOTE
Because the cell phone uses an intercom circuit, all stations on that circuit will lose intercom capability
when the cell phone is in use. Intercom conversations will still be present if the cell phone provides side-
tone, or if the audio panel is modified for telephone sidetone.
PS Engineering does not guarantee compatibility with personal cellular telephones.
Visit
www.ps-engineering.com for a list of phones that have been tested.
3.9.1 Cellular telephone sidetone
As shipped from PS Engineering, the PMA5000EX does NOT provide cellular telephone sidetone (the
user’s voice fed back to the headset). Some cell phones do not provide sidetone. In the PMA5000EX, tele-
phone sidetone can be enabled by holding the TEL button for more than three seconds.
3.10 Utility Jack
The 2.5-millimeter (3/32”) jack on the front of the PMA5000EX has three distinct functions:

Cell phone input
 Advisory audio input
 Music input
3.10.1 Cellular phone
When a cellular telephone is connected to this jack using a 2.5 mm to 2.5 mm adapter cord (PS Part
Number 425-006-7026), the PMA5000EX audio panel will connect the intercom to the cell phone when
the “TEL button is pressed (9), and behave as described in section 3.7. The telephone ringer, if present,
will be heard unless the input is muted by other radio or intercom.
3.10.2 Audio Advisory Input
The front jack can be used as a priority advisory input
for auxiliary systems such as a GPS terrain advisory
or portable traffic watch system. To prevent radio or
intercom from muting this input, press the “Mute”
button.