PS Engineering PMA6000M-C Installation Manual - Manual (Page 13)

PS Engineering
PMA6000 Series Audio Selector Panel and Intercom System
Installation Manual
200-066-0100 Page 2-6 Rev. 1, March 2005
A radio signal of more than 1 VRMS is needed to trigger the IRS. Therefore, if the IRS does not seem to be
recording, increase the aircraft radio volume slightly.
2.5 Adjustments
The PMA6000 is factory adjusted to accommodate the typical requirements for most aircraft configura-
tions. There are three adjustments however, that will allow the installer to tailor the specific functions. The
numbers correspond to identification numbers stamped on some trays.
Adjustment Clockwise Results In
Cabin Speaker Level Increase Speaker Vol-
ume
Marker Beacon Level Decrease Marker Volume
MKR Gain Increase overall sensitiv-
ity
MKR High Sense Increase sensitivity
MKR Low Sense Increase Sensitivity
Pass. Headphone (Mono ) Louder
To make the necessary adjustments, use a small
jeweler's slotted screwdriver.
Figure 2-1 Adjustments
2.6 Marker Antenna Installation
Refer to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2A (or later revi-
sion), Chapter 3, for information on proper antenna installation techniques. The marker beacon antenna
must be mounted on the bottom of the aircraft.
2.7 Communications Antenna Installation Notes
For best results while in Split Mode, it is suggested that the one VHF communications antenna be located
on top of the aircraft while the other communications antenna be on the bottom. Any antenna relocation
must be accomplished in accordance with AC 43.13-2A, aircraft manufacturers’ recommendations and
FAA-approved technical data.
Warning: It is probable that radio interference will occur in the split mode when the frequencies
of the two aircraft radios are adjacent, and/or the antennas are physically close together. PS Engi-
neering makes no expressed or implied warranties regarding the suitability of the PMA6000 in
Split Mode.
2.8 Unit Installation
To install the PMA6000, remove the copilot volume and squelch knob. Gently slide the unit into the
mounting rack until the hold-down screw is engaged. While applying gentle pressure to the face of the unit,
tighten the 3/32" hex-head screw next to the copilot control shaft until the unit is secure. DO NOT OVER
TIGHTEN. Reinstall the knobs.
MKR Hi Sense
(211)
MKR Audio Level
(233)
MKR Lo Sense
(231)
MKR Gain
(223)
Cabin Speaker
Level (111)
Pass
Volume
Level