TB 9-6625-2210-35
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
calibration of Transmission Test Set, AN/USM-608. TM 11-6625-3187-10 and TM 11-6625-
3187-24 were used as the prime data sources 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 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
Receiver:
Range: 20 Hz to 110 kHz
Accuracy: l Hz, 20 Hz to 100 kHz
5 Hz, 100 to 110 kHz
Level
Range: -40 to 10 dBm
Accuracy: 0.5 dBm, 20 to 200 Hz
0.2 dBm, 200 Hz to 15 kHz
0.5 dBm, 15 to 110 kHz
0.l dBm, 100 kHz, -19 to 0 dBm
Range: 20 Hz to 110 kHz
Accuracy: l Hz, 20 to 9999 Hz
10 Hz, 10 to 110 kHz
0.05 Hz, 1004 Hz
Level
Range: -40 to 10 dBm
Flatness: 0.5 dB, 20 to 200 Hz
0.2 dB, 200 Hz to 15 kHz
0.3 dB, 15 to 110 kHz
0.l dB, 1004 Hz
Distortion
Less than -50 dBm at 1004 Hz, 0 dBm reference
See footnote at end of table.
