TB 9-6625-2124-24
Figure 2. CW frequency accuracy equipment setup.
(2) Press function keys and enter corresponding data on keyboard as listed in (a)
through (c) below:
(a) INSTR PRESET key.
(b) CW key, DATA ENTRY 50 MHz.
(c) POWER LEVEL key, DATA ENTRY 10 dBm.
(3) Adjust FREQ CAL for microwave frequency counter indication of 50.00 MHz.
between 5.0 and 15.0 MHz; if not, perform b below.
indicate as specified; if not, perform b below.
Table 3. CW Frequency Accuracy
Test
Frequency counter
instrument
indications (GHz)
data entry
Min
Max
1
GHz
0.995
1.005
2
GHz
1.995
2.005
2.1
GHz
2.085
2.115
6.0
GHz
5.985
6.015
8.4
GHz
8.385
8.415
(7) Adjust autotransformer for 108 V ac output. Microwave frequency counter will
indicate within 20 kHz of value recorded in (6) above.
(8) Adjust autotransformer for 125 V ac output. Microwave frequency counter will
indicate within 20 kHz of value recorded in (6) above.
(9) Adjust autotransformer for a 115 V ac output.
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