PS Engineering PMA7000M-S Installation Manual - Manual (Page 19)

PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-070-0012 Page 2-12 Rev. 12, Sept. 2000
2.11.1.1 Marker Checkout (7000M-S only)
1. Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI sensi-
tivity, verify that a 160
µ
V, modulated 95% with 1300 Hz, signal will illuminate the amber (M) marker
light, and that marker audio is present in the headphones when the Marker Audio (M) push-button has
been depressed. Select SPR for speaker to verify marker audio availability on the cabin speaker. Verify
that the white (I) and blue (O) lights will illuminate within
±
3dB of the amber lamp, with 3000 HZ and
400 Hz applied, respectively.
2. Repeat with the unit in LOW sensitivity, with 430
µ
Volts applied.
3. Connect the marker antenna and verify proper operation.
2.11.2 Receiver Sensitivity
Although the PMA7000M meets FAA TSO-C35d sensitivity specifications, the sensitivity of the receiver
has been adjusted to meet real world requirements (150
µ
V and 430
µ
V, soft). This will usually eliminate the
need for the avionics shop to reduce the sensitivity in the field so as to prevent early detection of the marker
beacons. If your particular installation requires more or less sensitivity, see adjustment section 2.6, and fig-
ure 2-1.
2.12 Cellular Interface Checkout
When a wireless telecommunication system is installed and configured, a dial tone will appear in the head-
set of the pilot when the mic selector is in the “Tel” position. In “ALL” intercom mode, a dial tone will be
heard whenever the copilot or passenger’s hook switch is closed.
2.13 Internal Recorder Checkout (Optional)
With headset plugged into pilot’s side jacks, tune COM 1 to local frequency, such as FSS or ATC ground.
Select Com 1 on mic selector switch, and record at least five incoming radio transmissions.
This audio should only appear in the pilot’s headset, and only be incoming transmissions from the trans-
ceiver selected in the mic select switch.
Depress the panel or yoke mounted playback switch, and verify that messages play, in the order received.
Repeat for COM 2, and COM 3 (if installed).
2.14 Digital Annunciation Checkout (Optional)
If interfaced with an annunciation system, verify that all alert messages play at the appropriate time, and that
they are silenced by the “ACK” button.
2.15 Final Inspection
Verify that the wiring is bundled away from all controls and no part of the installation interferes with air-
craft control operation. Move all controls through their full range while examining the installation to see
that no mechanical interference exists. Verify that the cables are secured to the aircraft structure in accor-
dance with good practices, with adequate strain relief. Ensure that there are no kinks or sharp bends in the
cables and coaxial cables. Verify that the cables are not exposed to any sharp edges or rough surfaces, and
that all contact points are protected from abrasion.
Complete log book entry, FAA Form 337, weight and balance computation and other documentation as
required. Sample text for FAA Form 337, and instructions for continuing airworthiness can be found in Ap-
pendix F.
Return completed warranty registration application to PS Engineering.