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5.5.1
Frequency Tuning
1. Connect the Receiver and test equipment as shown in Figure 5-1.
2. Set the Receiver
as
follows:
a.
Frequency
As required in Table 5-4
b. Mode_
CW
c. BFO
1000 Hz
d. . AGC .
Short
e:
BandWidth
5 kHz (or closest bandwidth available)
3. Set the signal generator as follows:
a. Frequency
As required in Table 5-4
b. Level
-60 dBm, unmodulated
4. Set the Receiver and generator to the frequencies listed in Table 5-3. Ensure that the
output frequency indicated by the counter remains within the limits I kHz :t 10Hz
at each setting.
.
TABLE 5-4. TUNED FREQUENCIES
Receiver/Generator
Tpned Frequency
AF Output
00.500000 MHz
1000 ±10 Hz
01.000000
1000 ±10 Hz
11.111111
1000 ±10 Hz
22.222222
1000 :tlO Hz
23.333333
1000 :!:l 0 Hz
24.444444
1000 ± 10 Hz
25.555555
1000 ± 10 Hz
26.666666
1000 :t 10 Hz
27.777777
1000 ± 10 Hz
28.888888
1000 ±10 Hz
29.999999
1000 :t10 Hz
5.5.2
Frequency Display
1. Set up the equipment
as
in Figure 5-1.
2. Set the signal generator as follows:
a. Frequency
1.5 MHz
b. Mode
CW
c. Level
. -100 .dBm
3. Tune the Receiver to 1.5 MHz using manual gain mode, 3.24 kHz BW; CW; at -1.8
kHz BFO offset.
4. Ensure that frequency readout display is clearly visible from a distance of 3 feet.
5-12
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