TB 9-4931-523-35
APPENDIX A
TEST INSTRUMENT IDENTIFICATION
Nominal
Insertion loss
attenuation
Accuracy
at 0 dB
Model number
Manufacturer
(dB)
range
(dB)
(dB)
(GHz)1
9918-302
Weinschel
30
DC to 18
1.0
1.5
9918-602
Weinschel
60
DC to 18
9918-32
Weinschel
3
DC to 18
0.3
9918-62
Weinschel
6
DC to 18
0.3
9918-102
Weinschel
10
DC to 18
0.5
9918-202
Weinschel
20
DC to 18
0.5
1Not
calibrated below 10 MHz using this TB.
2Prepare
test report for this item using receiver system indications for system codes: U04, U06, U10, U11, Ul2, F00 and
W05.
3Not checked below -100 dB.
4Accuracy of receiver system (Weinschel, Model VM4) must be considered as well as losses associated with any adapter used.
5Some attenuation settings (>30 dB) will result in accuracy ratios between standard and TI to be <4:1.
6The frequency of this item is Code A 124 MHz. The actual frequency is classified.
7From value on body or shown on correctional chart.
8Deviation from value measured at 4 GHz.
9Provide calibration chart at 1 GHz giving attenuation every 1 dB up to 20 dB and every 5 dB from 20 to 70 dB. Accuracy of
calibration chart will not be less than 0.05 dB/10 dB.
CHANGE 1
