PS Engineering PMA8000MP3 Installation Manual - Manual (Page 11)

PS Engineering
PMA8000B-MP3 Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0600 Page 2-4 Rev. 6, Oct. 2010
Some avionics do not provide a separate audio low, and may introduce additional electrical noise into the
system. For best results, connect the audio low from the audio panel to the radio ground, using one con-
ductor of the twisted-shielded cable.
2.4.5.1 Speaker Load
The PMA8000B-MP3 contains one speaker amplifier. Some units with internal speaker amplifiers, such
as the King Radio KX170-series, require a resistive load to prevent damage if their speaker amplifier is
not used. Connect the speaker output from the unit to the COM 2 Speaker load input on the PMA8000B-
MP3 (J1 27 WRT 28). The speaker load is 16 , 3W.
2.4.6 TEL (Duplex) Function for Cell Phones
This mode is designed to operate with telecommunications systems, such as the AirCell Guardian 1000.
Audio streams selected by the intercom mode are provided to the Tel output, and audio from Tel is pr e-
sented to the headset. This allows a full-duplex telephone-like audio interface.
The TEL mode in the PMA8000B-MP3 is also compatible with many cellular telephones with hands -free
headset interfaces. The front panel 3/32” utility jack can be used as the interface to the Cell Phone, or a
3/32” jack can be installed somewhere on the aircraft panel. The wired interface jack is connected with
the PMA8000B-MP3 as shown: A patch cord (3/32” to 3/32”) is available from PS Engineering under
P/N 425-006-7026.
3/32" Cellular Jack
COM 3 Mic Input
Com 3 Audio
Audio Lo
Cellular Plug (typical)
Tip= Microphone out
Ring= Speaker audio
Base=Ground
This is a typical interconnect
PS Engineering does not guarantee
compatability in all cases.
Cellular Phone
Interconnect
Figure 2-1 Cellular telephone interface for rear connector, if an additional jack is desired
2.4.6.1 Cell phone Sidetone
As shipped from PS Engineering, the PMA8000B-MP3 does not provide cellular telephone sidetone (the
user’s voice fed back to the headset). Some cell phones do not provide sidetone. For units with serial num-
ber E10251 and above, telephone sidetone can be enabled by pressing the TEL and ADF buttons at the
same time, for more than one second. This setting will be remembered by the unit. In units with serial
numbers E10250 and below, an internal modification can be made that will allow the PMA8000B -MP3 to
provide this sidetone. Contact PS Engineering for more information.
NOTE
Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement ac-
tion, which may include a $10,000 fine per incident. PS Engineering, Inc. does not endorse using unap-
proved cellular telephone equipment in flight, and takes no responsibi lity for the user’s action.
PS Engineering does not guarantee compatibility with personal cellular telephones. For a list of phones
that have been tested, visit
www.ps-engineering.com .
2.4.7 Transmit Interlock
Some communications transceivers use a transmit-interlock system. To fully utilize the Split Mode fea-
ture, this function must be disabled. Consult that manufacturer's installation ma nual.