User's Manual

ROCKWELL COLLINS
COMPONENT MAINTENANCE MA NUAL with IPL
TDR-94, PART NO 622-9352
STEP PROCEDURE DESIRED RESULTS
1.11 Verify that the reply rate is between 90% and 100%. If not,
readjust A7R111 for a reply rate between 90% and 100%.
N
OTE: If the Minimum Trigger Level (MTL) cannot be established
within the specified limits, or if the MTL does not
stay within the specified limits over the operational
temperature range, the A7R127 (for the Top channel)
and/or A7R137 (for the Bottom channel) (CPN
705-3543-020) may be added as needed.
1.12 Set the MODE-S test set signal strength for -31 dBm. Adjust
A7R123 for desired results.
Amplitude of the P1 pulse at
J7-31is5.00±0.05volts.
1.13 Repeat steps 1.11 and 1.12 as required.
1.14 a. Set the MODE-S test set signal strength to -50 dBm. Measure
and note the amplitude of the P1 pulse at J7-31.
b. Apply the same input signal level to the bottom channel.
Measure and note the amplitude of the P1 pulse at J7-33.
c. Verify that the two amplitudes are within 0.1 volts of each
other. If this is not the case , reduce the stronger of the two
measurements by adjusting the appropriate Slope Adjust,
A7R123 or A7R133, until the difference is less than 0.1 volts.
N
OTE: If this readjustment is performed, then the MTL
must be readjusted in accordance with either step
1.4 or 1.11, whichever is appropriate for the Top or
Bottom channel requiring adjustment.
____ V
_____V
Voltagedifferenceshouldbe
less than 0.1 volt
1.15 Monitor the positive end of A6C59 on the Video Processor board.
1.16 Set the MODE-S test set signal strength to -27 dBm. Adjust
A6R117 on the Video Processor board such that the ditch-slope
waveform resulting from P1 has the desired results.
N
OTE: Extra care must be taken in the adjustments made in
the following steps 1.17 through 1.19. DPSK trimmer
capacitor A7C301 adjustments should be made in very
small increments or steps. These adjustments are critical
to the performance of the UUT. Capacitor A7C301 should
only be adjusted at the board or card level (if possible).
16.2 ±0.2 ȝswideatitsbase
Alignment Procedure Cont.
Table 1002/Table 34-50-96-99A-010-A01
34-50-96
Page 1075
Apr 17/07