TB 9-6625-2000-35
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This bulletin provides instructions for the calibration
of Signal Generator AN/URM-206 and Polarad Model 1608E-Y. The manufacturer's manual
and TM 11-6625-2948-14&P 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. AN/URM-206 and Polarad Model 1608E-Y consists of Signal
Generator SG-1145/URM, Polarad Model 1108E-Y and Modulator MD-1075/URM, Polarad
Model 1020A-Y.
b. Time and Technique. The time required for this calibration is approximately 3
hours, using the Microwave technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
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
Range:
7.0 to 11.0 GHz
Accuracy:
1% of readout
0 to -127 dBm1
Power output and attenuation
Range:
0 to -7 dBm 3 dB
Accuracy:
-7 to -127 dBm1 2 dB
Internal square wave modulation2
Range:
950 to 1050 Hz continuously variable
Internal pulse modulation
Pulse Rate: 40 to 4000 pps continuously variable
Pulse Width: 0.5 to 10 s continuously variable
< 0.2 s
Rise and Fall:
0.3 to 2000 s continuously variable
Delayed output
Range:
Only calibrated to -110 dBm.
1
SG1145/URM-1108E-Y only.
2
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Sets, AN/GSM-286, AN/GSM-287 or AN/GSM-705. Alternate items may be used by
the calibrating activity. The items selected must be verified to perform satisfactorily prior to
