TB 9-4920-358-24
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MODE 4 interrogation video .............................
MODE 4 system accept/reject ...........................
MODE 4 SLS pulse ............................................
Power supply ......................................................
Final procedure ..................................................
Radar test set menus .........................................
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Transponder Set, Test Set AN/APM-378. TM 11-4920-296-14&P was used as
the prime data source in compiling these instructions. The equipment being calibrated will
be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately 4
hours, using the microwave technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument
Performance specifications
parameters
Receiver
Sensitivity: -6 dBm +1 dB
Bandwidth: 7.0 +1 MHz (-3 dB points)
Frequency: 1090 MHz +0.5 MHz
Interrogation rate: 257 +5 Hz
Power: -6 dBm +1 dB
Frequency: 1030 +0.2 MHz
Pulse width: 0.7 to 0.9 s
Pulse spacing: MODE
3 0.2 s
1
5 0.2 s
2
3/A 8 0.2 s
21 0.2 s
C
Test 6.5 0.2 s