TB 9-6625-2124-35
c. Connect autotransformer to a
115 V ac
source and
adjust for 115 V
output.
d. Set LINE switch to ON and allow at least 1 hour for equipment to warm-up
and stabilize.
13. CW Frequency Accuracy and Stability
a. Performance Check
NOTE
Connect to microwave frequency counter input 1 or 2 as
determined by frequency measurement requirement.
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.
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