TB 9-6625-2124-24
indicate as specified; if not, perform b below.
Table 5. CW Frequency Accuracy
Test
Frequency counter
instrument
indications (GHz)
data entry
Min
Max
1
GHz
0.995
1.005
2.4
GHz
2.395
2.405
4
GHz
3.995
4.005
2.5
GHz
2.495
2.505
7
GHz
6.995
7.005
10
GHz
9.990
10.010
7.1
GHz
7.090
7.110
13.5
GHz
13.490
13.510
17
GHz
16.985
17.015
14
GHz
13.985
14.015
(7) Adjust autotransformer for 108 V ac output. Microwave frequency counter will
indicate within 50 kHz of indication recorded in (6) above.
(8) Adjust autotransformer for 125 V ac output. Microwave frequency counter will
indicate within 50 kHz of indication recorded in (6) above.
(9) Adjust autotransformer for 115 V ac output.
b. Adjustments
(1) Connect multimeter to A8TP12 (+) and A8TP1 (-) (fig. 6).
(2) Adjust A8R44 (fig. 6) for multimeter indication of -10.000 V dc (R).
(3) Disconnect multimeter from A8TP12 and A8TP1. Connect to A6TP9 (+) and
A6TP10 (-) (fig. 7).
(4) Press INSTR PRESET and CW keys. Enter data 20 GHz on keyboard.
(5) Adjust FREQUENCY VERNIER control for multimeter indication of 10.000 V dc.
(6) Disconnect multimeter from A6TP9 and A6TP10. Connect to A8TP6 (+) (fig. 6)
and A7TP8 (-) (fig. 8).
(7) Press function keys and enter corresponding data on keyboard as listed in as
listed in (a) through (f) below:
(a) SHIFT key, DATA ENTRY 002.
(b) GHz key, DATA ENTRY 80.
(c) M2 key, DATA ENTRY 00.
key, DATA ENTRY 00.
(d)
key, DATA ENTRY 00.
(e)
key, DATA ENTRY 00.
(f)
23