User's Manual

ROCKWELL COLLINS
COMPONENT MAINTENANCE MA NUAL with IPL
TDR-94, PART NO 622-9352
STEP PROCEDURE DESIRED RESULTS
0.5 BUS NAMING CONVENTIONS
When reading this test procedure, the terms CSDB and PLII
are used interchangeably to denote the Commercial Standard
Digital Bus, commonly known as the Pro-Line II bus at Rockwell
Collins, Inc.
The ARINC 429 data bus is commonly called the ARINC bus or
the 429 bus and either term may appear in documentation.
Selection of busses from the test software will refer to por t "A"
as port 0, port "B" as port 1, and port "C" as port 2.
1.0 RECEIVER TESTS
Perform the following tests on both the top and bottom antenna
ports for the TDR-94D. For the TDR-94, perform only those
tests specified for the bottom channel.
1.1 MTL Test
Test MTL is defined as the minimum interrogation power level
which produces a reply rate of at least 90%.
Determine the minimum interrogation level (MTL) required to
obtain at least a 90% reply rate for the following interrogations.
Verify that these levels are between -75 and -79 dBm.
I
nterrogations
A. MODE-S only All-Call
B. ATCRBS MODE-A/MODE-S All-Call
C. ATCRBS MODE-C
N
OTE: If the MTL cannot be established within the specification
limits, A7R127 and/or A7R137 (CPN 833-6008-020)
may be added as required to adjust temperature
compensation. Refer to the A7 maintenance aid
diagram for component location. This information is
provided for reference only, after initial values are
determined in production, no further temperature
compensation adjustments should be necessary.
TOP BOTTOM
_____ _____
_____ _____
_____ _____
N
OTE: Refertostep22.0in
Table 1002/Table 34-
50-96-99A-010-A01,
Alignment Procedure.
1.2 Sensitivity Variation with Frequency Test
Using ATCRBS MODE-C interrogations, ensure that MTL does
not vary by more than ±1 dB for interrogation frequencies
between 1029.8 and 1030.2 MHz.
TOP BOT
1029.8 MHz ____ ____
1030.2 MHz ____ ____
Final Performance (Customer Acceptance) Test. Cont.
Table 1001/Table 34-50-96-99A-009-A01
34-50-96
Page 1011
May 18/06