TB 9-6625-2303-35
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
calibration of Radio Frequency Power Test Set, AN/URM-213. TM 11-6625-3276-14&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 dc and low frequency technique and microwave frequency techniques.
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
Wattmeter mainframe
Audio frequency range: 900 to 1100 Hz
Factor
Accuracy
1%
100
1%
30
1%
10
1%
3
1%
1
1.5%
0.3
1.5%
0.1
Plug-in element 4410-8
Test frequencies: 200, 400, 750, and 1000 MHz
Applied power: 8 Watts
Accuracy: 5% FS ( 0.5 W)
Plug-in element 4410-6
Test frequencies: 50, 100, and 200 MHz
Applied power: 8 Watts
Accuracy: 5% FS ( 0.5 W)
Plug-in element 4410-5
Test frequencies: 25, 60, and 80 MHz
Applied power: 8 Watts
Accuracy: 5% FS ( 0.5 W)
Plug-in element 4410-4
Test frequencies: 2, 10, and 30 MHz
Applied power: 25 Watts
Accuracy: 5% FS ( 1.5 W)
Plug-in element 4410-2
Test frequencies: 450 kHz, 1 and 2.5 MHz
Applied power: 80 Watts
Accuracy: 5% FS ( 5 W)
