Anodyne Electronics Manufacturing SM40 Installation And Operation Manual - page 11
UT12-000 Universal Encoder/Decoder
SM40 Installation and Operation Manual
May 15, 2012 Rev: 5.00
Page 2-2
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
2.3.3
Cabling and Wiring
All unshielded wire should be MIL-W-22759 or equivalent. For shielded wire applications, use Tefzel MIL-
C-27500 shielded wire with solder sleeves (for shield terminations) to make the most compact and easily
terminated interconnect. Follow the wiring diagrams in Section 2.6 as required.
Allow 3 inches from the end of the wire to the shield termination to allow the hood to be easily installed.
Note that the hood is a ‘clamshell’ hood, and is installed after
the wiring is complete.
All wiring should be at least 22 AWG, except power and ground lines, which should be at least 20 AWG.
Ensure that all ground connections are clean and well secured.
2.3.4 Post-Installation
Checks
If any preset requires adjustment, be sure this is carried out before the aircraft leaves, and that the unit
and its mating connector are secured before departure. Make all required log book entries, electrical
load, weight and balance amendments and other paperwork as required by your local regulatory agency.
2.3.4.1 Voltage/resistance
checks
Do not attach the UT12 until the following conditions are met.
Check the following:
a) P101
pins
and
for +28 Vdc relative to ground.
b) P101
pins
and
for continuity to ground (below 0.5
Ω
)
2.3.4.2
Power On checks
Install the UT12 and power up the ship’s systems. Turn on the Universal Tone Encoder/Decoder. Verify
normal operation of all functions. Refer to Section 3 for specific operation details.
2.3.5 External
Adjustments
The unit is shipped from the factory with all external adjustments set to the normal test levels. Once
installed in the aircraft, it may be desirable to change some of these settings to best suit the local
operating environment. The external adjustments are accessible through the right hand side of the unit
and are as follows:
CCIR LVL
Adjusts the signal level of the CCIR tone sent to the transceiver.
ALRT LVL
Adjusts the signal level of the tone alert signal sent to the headset.
DTMF LVL
Adjusts the threshold level setting for determining a valid tone signal received
transceiver. (Located on left side of unit).
Upon satisfactory completion of all performance checks, make the required log entries and
complete the necessary Regulatory Agency paperwork before releasing the aircraft for service.