User Manual

120 10503-201 PRELIMINARY T-96S Technical Manual
11
3. Adjustments and
Maintenance
1.1 Overview
This chapter outlines the basic adjustment pro-
cedures required upon initial installation and
thereafter at prescribed maintenance intervals.
Units are delivered from the factory properly
aligned and tested on the frequencies specified
at time of order. Adjustment beyond that de-
scribed in this chapter is not required unless ra-
dio modules have been tampered with or re-
paired. In such cases we recommend complete
factory re-alignment as special test jigs are re-
quired.
3.1 Intended Audience
This chapter is intended for use by installation
and maintenance personnel.
3.2 Equipment Required
The adjustments described below require the
following equipment:
• 13.3 VDC (nominal), 3A regulated power
supply.
• Radio service monitor (IFR or equivalent).
• Cable with SMA-male connector to connect
T-96H to the service monitor.
• T96H Radio Service Software (T96HRSS)
kit, including setup cable (p/n 085 03250-
xxx)
• A 486 PC (or better) to run the T96HRSS.
• Normal radio shop tools.
3.3 Maintenance Intervals
The adjustments described below should be
done once upon initial installation of the unit,
and thereafter at annual intervals or whenever a
deterioration in performance indicates that ad-
justment may be required.
3.4 T96H Adjustments
3.4.1 Preliminary Verification
Before performing any adjustments, verify the
performance of the unit as shown in the Table 5
for full channel
units
in the Table 6 for half
channel
units
.
Important Note: Before proceeding make
sure that the service monitor has been cali-
brated recently and has warmed up for at
least the time specified by its manufacturer.
Some reported frequency and deviation prob-
lems have actually been erroneous indications
from service monitors that have not adequately
warmed up. This is particularly likely when
field service is done during winter months.
3.4.2 Basic Adjustments
Basic adjustments to be performed are:
1. Transmitter power output
2. TX/RX frequency
3. Transmitter deviation
4. Demodulated audio level
These adjustments should be performed in the
sequence shown above.
3.4.3 Tests & ajustments
Refer to the T96HRSS help file for parameter
information.
1. Connect the T-96H antenna connector to the
TX/RX input of the service monitor using a
suitable length of 50 ohm cable.
2. Connect the T-96H to a suitable power sup-
ply and adjust the supply voltage to 13.3
volts.
3. Using the setup cable (p/n 730 03266-001;
part of kit 085 03250-xxx) connect the
T-96H Data connector to the serial port of a
PC and run the T96HRSS program. This ca-
ble is required to put the T-96H into
setup
mode
.
4. Press
GET
to get the configuration of the
unit.
5. Refer to “
Tests and Adjustments
” tables re-
lated to the radio type (half or full channel).