TB 9-6625-2280-40
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Reference Calibration
Standards Set, NSN 4931-00-621-7878. 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
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)
Frequency range: 0.955 to 1.05 GHz
Weinschel, Model 9918, 9918-
Attenuator range: 10 dB
10dB, 9918-20dB, and 9918-30dB
Accuracy: 0.3 dB
(9918)
Attenuator range: 20 dB
Accuracy: 0.5 dB
Attenuator range: 30 dB
Accuracy: 1.0 dB
AUTOTRANSFORMER
Voltage range: 105 to 125 V ac
Ridge, Model 9020A
Accuracy: 1%
(9020A)
CALIBRATOR
Dc voltage range: 5.00 and 10.00 V dc
Fluke, Model 5720A (5720A)
Accuracy: 1.2%
(p/o MIS-35947); w/ amplifier,
Fluke 5725A/AR (5725A/AR)
DIRECTIONAL COUPLER
Frequency range: 1 GHz
Wavecom, Model L901E
Coupling factor: 10 dB
(MIS-10409/2133)
FREQUENCY COUNTER
Frequency range: 0.95 to 1.05 GHz
Fluke, Model PM6681/656
Accuracy: 1.25%
(PM6681/656)
Hewlett-Packard, Model 3458A
Resistance range: 200 Ω
(3458A)
Accuracy: 0.01%
Dc voltage range: 150 V to 15.045 V dc
Accuracy: 0.0075%
Amplitude range: DC Offset
Agilent, Model 54831M
measurement capability
(OS-303/G)
-0.002 to +0.002 mVdc
POWER METER
Frequency range: 0.95 to 1.05 GHz
Tegam, Model 1830A (1830A)
Power range: 0. 1 to 9 mW
w/thermistor mount, Hewlett
Accuracy: 1.125%
Packard, Model 478A-H75
(7915907)