TB 9-4931-534-35
Set NSN 4931-00-621-7878, Secondary Reference Calibration Standards Set with limited
deployment standards, and Microwave Standards Kit, 18-40 GHz (Secondary Reference).
Alternate items may be used by the calibrating activity when the equipment listed in table
and must bear evidence of current calibration. The equipment must meet or exceed the
minimum use specifications listed in table 1.
usage accessories, issued as indicated in paragraph 4 above, and are not listed in this
calibration procedure. The following peculiar accessory is also required for this calibration:
Microwave Hardware Kit (7915898), 18-40 GHz (Secondary Reference and AN/GSM-287 or
AN/GSM-705).
Common name
Minimum use specifications
Manufacturer and model
(part number)
Weinschel, Model 9918, 9918-
ATTENUATOR
Range: 20 dB
20dB, and 9918-30dB, and
(FIXED)
Frequency Range: 10 MHz to 18 GHz
Accuracy: 0.5 dB
9918-60dB (9918)
Range: 30 dB
Frequency range: 10 MHz to 18 GHz
Accuracy: 1.0 dB
Range: 60 dB
Frequency range: 10 MHz to 18 GHz
Accuracy: 1.5 dB
Hewlett-Packard, Model X752C
DIRECTIONAL
Frequency range: 8.2 to 12.4 GHz
(7923188)
COUPLER NO. 1
Coupling: 10 dB
Directivity: 40 dB
Coupling variation: 0.4 dB of nominal
Hewlett-Packard, Model P752C
DIRECTIONAL
Frequency range: 12.4 to 18.0 GHz
(7923187)
COUPLER NO. 2
Coupling: 10 dB
Directivity: 40 dB
Coupling variation: 0.4 dB of nominal
PRD, Model K414-10-FSI
DIRECTIONAL
Frequency range: 18.0 to 26.5 GHz
(7923152)
COUPLER NO. 31,2
Coupling: l0 dB
Directivity: 40 dB
Coupling variation: 0.4 dB of nominal
PRD, Model Al 41-10-FSI
DIRECTIONAL
Frequency range: 26.5 to 40 GHz
(7923153)
COUPLER NO. 4
Coupling: 10 dB
3
Directivity: 25 dB
Coupling variation: 1.2 dB of nominal
Weinschel, Model 1611 (1611)
FREQUENCY
Frequency range: 18.0 to 26.5 GHz
EXTENSION NO. 1
IF frequency: 700 MHz
1,4
Combined accuracy with receiver system: 0.03
dB/10 dB
Weinschel, Model 1612 (1612)
FREQUENCY
Frequency range: 26.5 to 40 GHz
EXTENSION NO. 23,4
IF frequency: 1 GHz
Combined accuracy with receiver system: 0.03
dB/10 dB
See footnotes at end of table.
