TB 9-6625-340-35
SECTION I
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of Radio Frequency Power Test Set, AN/USM-161( ) (TS1776). TM 11-6625-
498-45 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 8
hours, using the microwave technique.
2. Forms, Records, and Reports
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 parameters
Performance specifications
Input power
2 W to 10 mW; to 5 W with external attenuators
10 MHz to 10 GHz without external attenuator
1 to 10 GHz with external attenuators
Power measurement2
2% FS
1
Verify at 9.8 GHz, only, unless customer specifies differently.
2
This specification verified to 5% of FS, excluding attenuators.
SECTION II
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-287. Alternate items may be used by the calibrating activity when
the equipment listed in table 2 is not available. The items selected must be verified to
perform satisfactorily prior to use and must bear evidence of current calibration. The
equipment must meet or exceed the minimum use specifications listed in table 2. The
accuracies listed in table 2 provide a four-to-one ratio between the standard and TI.
2
