TB 9-5985-314-24
APPENDIX A
DIRECTIONAL COUPLERS
TEST INSTRUMENT IDENTIFICATION - CONTINUED
Frequency
Nominal
Coupling
Frequency
Model/part
range
coupling
variation
sensitivity
(dB) 1 2
(dB) 1 2
(dB) 1 2
(dB)1
number
Manufacturer
(GHz)
774-30
Waveline
12.4 to 18.0
30(0.3)
0.5
N/A
40
774-40
Waveline
12.4 to 18.0
40(0.3)
0.5
N/A
40
776D
Hewlett-Packard
0.94 to 1.9
20
1.0
N/A
40
20 7
778D
Hewlett-Packard
0.1 to 2.0
1.5
N/A
36 (0.1 to 1.0 GHz)
32 (1 to 2 GHz)
30 (0.1 to 2 GHz,
B port)
207
778DOPT012
Hewlett-Packard
0.1 to 2.0
1.5
N/A
36 (0.1 to 1.0 GHz)
32 (1 to 2 GHz)
30 (0.1 to 2 GHz,
B port)
7913359-2-2
Military
8.2 to 12.4
10
0.4
0.5
40
797D
Hewlett-Packard
1. 9 to 4.1
20(0.5)
0.2
N/A
26
7923152
Military
Same as
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K414-40-FS1
7923153
Military
Same as
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A414-10-FSl
874-40
Waveline
18.0 to 26.5
40 (0.3)
0.5
N/A
40
1See
paragraph 7 for definitions.
2Nominal
coupling tolerances are the linear combination of coupling variation and frequency sensitivity nominal coupling
tolerance ( (coupling variation) + ( (frequency sensitivity). Example: Hewlett-Packard, Model 776D - 20 (nominal coupling)
= 20 l dB over TI's frequency range.
3Provide correction chart of receiver system actual indications.
4Absolute calibration accuracy for manufacturer selected frequencies stamped on data plate of TI.
5Per 10 dB step.
6Use test frequencies of: 10, 30, 60, 100, 150, and 200 MHz.
7Decreasing frequency from 0.45 to 0.1 GHz has an increasing slope of 0.006 dB/MHz. Example: nominal coupling (dB) at
0.1 GHz is 22.l.
A-3/(A-4 Blank)
Change 1