TB 9-6625-2327-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set, AN/GSM-287 or 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
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.
5. Accessories Required. The accessories required for this calibration are common
usage accessories, issued as indicated in paragraph 4 above, and are not listed in this
calibration procedure.
Table 2. Minimum Specifications of Equipment Required.
Manufacturer and model
Common name
Minimum use specifications
(part number)
ATTENUATOR (FIXED)
Range: 10 dB with test report
Weinschel, Model 9918-10dB
1
Accuracy:
(9918-10dB)
AUDIO ANALYZER
Distortion Range: 100 Hz to 19 kHz
Boonton Model 1121
Capability: <0.2%
(1121)
FREQUENCY COUNTER
Range: 100 MHz to 80 MHz
Fluke, Model PM6681/656
(PM6681/656)
Accuracy: 0.25 ppm
Range: 9.546 mV rms to 7.07 V rms
Hewlett Packard, Model
3458A (3458A)
Accuracy: 0.25%
Range: 5.0 V at 100 ns
Agilent, OS-303/G (OS-303/G)
Accuracy: 3.0%
POWER METER
Range: 100 kHz to 80 MHz
Agilent, Model E4419B w/
0 to 24 dBm
Power sensor Agilent, Model
8482A
Accuracy: 0.25%
SPECTRUM ANALYZER
Range: 500 kHz to 75 MHz
Agilent, Model E4407B-H76
Capability: <-60 dBc
(AN/USM-677)
1
Characterize attenuator (fixed) at 100 kHz.
CALIBRATION PROCESS
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.