SECTION I IDENTIFICATION AND DESCRIPTION

TB 9-4920-358-35

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MODE 4 interrogation video.............................

MODE 4 system accept/reject ...........................

MODE 4 SLS pulse ............................................

Power supply ......................................................

Final procedure ..................................................

APPENDIX

Radar test set menus .........................................

A-1

SECTION I

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

+(percent of reading plus digits)

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

Transmitter

Power: -6 dBm +1 dB

Frequency: 1030 +0.2 MHz

Pulse width: 0.7 to 0.9 µs

Pulse spacing:

MODE

+ 0.2 µs

3/A

+ 0.2 µs

6.5 ± 0.2 µs

Test