PS Engineering PMA5000EX Installation Manual - Manual (Page 10)

PS Engineering
PMA5000EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-550-0100 Page 2-4 Rev. 1 Jan. 2011
3/32" Cellular Jack
COM 3 Mic Input
Com 3 Audio
Audio Lo
3
5
4
PMA5000EX
J1
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
2.4.5.1 Cell phone 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 PMA5000EX, tele-
phone sidetone can be enabled by holding the TEL button for more than one second. This setting will be
remembered when the power is off.
NOTE
Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement a c-
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 cel lular telephones. For a list of phones
that have been tested, visit www.ps-engineering.com.
2.4.6 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.
2.4.7 "Swap" Mode
When a momentary, normally open, push-button switch is connected between pin 20 on the J2 connector
and aircraft ground (or J2-pin 21), the user can switch between Com 1 and 2 by depressing this switch
without having to turn the mic selector switch. This yoke-mounted switch eliminates the need to remove
your hands from the yoke to change transceivers. The transfer of TX indication from Com 1 to Com 2
shows that the swap has been initiated; there is no dedicated swap indicator.
2.4.8 Backlighting
The PMA5000EX has an automatic dimming of the pushbutton annunciation LEDs controlled by a phot o-
cell. Control of the unit backlighting is through the aircraft avionics dimmer For 14 V aircraft, connect J2
Pins 6 and 7 to the aircraft dimmer bus, and pin 5 to ground. For 28-volt systems, connect pin 7 to the
aircraft dimmer, and pins 5 and 6 to ground.
If an external dimmer control is not used, a constant back light illumination can be established for nigh t-
time viewing. Pin 6 or 7 (depending on system voltage) must be tied to power (J2, pin 8 or 9) for the back
lighting system to work. The photocell mounted in the unit face will automatically adjust the intensity of
the push-button annunciator LEDs.
2.4.9 Unswitched inputs
J1, pins 31, 29 and J2 pin 15 are unswitched, unmuted (by transmitter keying), inputs # 1, 3 and 4, r e-
spectively. These inputs are presented to the pilot and copilot regardless of the audio configuration, and
will always mute the entertainment inputs. Thes e 510Ω inputs can be used for altimeter DH audio, GPS