TB 9-6625-2204-35
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
calibration of Transponder Test Set, AN/APM-239A (including Transponder Set Test Set
TS-2681/APM-239A and Multimeter ME-358/APM-239A). TM 116625-842-15 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 2
hours, using the dc and low frequency technique.
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).
pertain to this calibration are listed in table 1.
Test instrument parameters
Performance specifications
Range: 0 to 150 V ac
0 to 50 V dc
Accuracy: 4% FS
Range: 0 to 2 A ac
0 to 10 A dc
Accuracy: 4% FS
Pulse characteristics
Amplitude: 5 V 0.5 V
Width: 0.5 s 0.05 s
Rise time: ≤ 0.1 s
Delay: ≤ 0.25 s
Negative overshoot: ≤ 1.5 V
Output voltage
Range: 20 V dc
Accuracy: 1.5 V dc
Dc voltage
Range: 10 to 30 V
Accuracy: 4% FS
Ac voltage
Range: 10 V
Accuracy: 5% FS
Dc current
Range: 5 to 10 mA
Accuracy: 4% FS
