
Resistor
FIP
Fart Number
6.8
0683-0685
12.1
0757-0379
17.8
0757-0294
23.7
0698-343 1
31.6
0757-0180
38.3
0698-3435
46.4 0698-4037
51.1
0757-0394
61.9
0757-0276
110
0757-0402
121
0757-0403
133
0698-3437
147
0698-3438
178
0698-3439
215
0698-3441
261
0698-3132
422
0698-3447
825
0757-042 1
14. 100 MHz VCXO Adjustments
‘able
3-10. Resistor Values
22. Set the controls of the second spectrum analyzer as follows:
CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.400
MHz
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.50
MHz
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7
dBm
LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB/div
RES BW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
kHz
VIDEO BW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
kHz
23. Check for 10 MHz sidebands on the 400 MHz output signal at 390
MHz and 410 MHz. If 10 MHz sidebands are visible, they should
be greater than 70
dB
down
(>-70
dBc)
from the power level of
the 400 MHz output signal.
24. Disconnect the second spectrum analyzer from the
A7A2
100 MHz
VCXO Assembly. Reconnect the cable 96 (white/blue) to A7A3Jl
400 MHz IN.
Adjustments
3-l
3 1
Commentaires sur ces manuels