TB 9-6625-335-24
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of the Hand-held Radio Test Set, Model AN/PRM-36. TM 9-6625-1697-23&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 1
hour, using the dc and low frequency technique.
2. Forms, Records, and Reports. Forms, records, and reports required for calibration
personnel at all levels are prescribed by TB 750-25.
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Test instrument
Performance specifications
parameters
Range: -97 dBm from 30-512 MHz
RF STIM
Accuracy: 3 dBm
Range: 30-512 MHz
measurement
Accuracy: 2 kHz
Range: 1 to 50 W (forward power)
Power
1 to 20 W (reverse power)
measurement
Accuracy: 20%
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2 identifies the specific equipment to be used in this
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-287 and AN/GSM-440. Alternate items may be used by the
calibrating activity. 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. Where the four-to-one ratio cannot be met, the
actual accuracy of the equipment selected is shown in parentheses.
Table 2. Minimum Specifications of Equipment Required.
Manufacturer and model
Common name
Minimum use specifications
(part number)
LOW PASS FILTER
Telonic, Model TLC125-6EF1
> 42 dB
Range: ≈1 to 25 Watts (100 MHz)
RF POWER METER
Bird, Model 4421 (4421) w/
Accuracy: 5%
Directional power sensor,
Model 4022