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ADJUSTMENTS MODEL 8559A
ADJUSTMENTS
5
-
28. FREQUENCY RESPONSE ADJUSTMENTS (Cont'd)
3
to
9
GHz
Adjustment
39.
Change synchronizer POLARITY to
-
.
40.
Change spectrum analyzer Amplitude Scale to 10 dB/DIV and FREQUENCY BAND GHz to 3
-
9.
41. Adjust sweep oscillator for swept output from 3 to 9
GHz.
42. Adjust Tuning Voltage Circuit GAIN and OFFSET controls to phase
-
lock swept signal from 3 to 9 GHz.
Refer to Figure 5-19c.
43. Change spectrum analyzer Amplitude Scale to
1
dB/DIV.
44.
Adjust A12R83 V2
-
(bias), A12R59 3A (offset), and A12R49 3B (tilt) for best overall flatness of trace
from 3 to
9
GHz with trace approximately centered about the sixth horizontal graticule line on the CRT.
45. Total deviation of trace from 3 to 9
GHz should not exceed 3.0 dB.
9
to 15
GHz
Adjustment
Change synchronizer POLARITY to
+
.
Change spectrum analyzer Amplitude Scale to 10 dB/DIV and FREQUENCY BAND GHz to 9
-
15.
Adjust sweep oscillator for swept output from 9 to 15
GHz.
Adjust Tuning Voltage Circuit GAIN and OFFSET controls to phase
-
lock swept signal from 9 to 15 GHz.
Refer to Figure 5
-
19d.
Change spectrum analyzer Amplitude Scale to 1
dB/DIV.
Adjust A12R87 V2
+
(bias), A12R60 4A (offset), and A12R51 4B (tilt) for best overall flatness of trace
from 9 to 15
GHz with trace approximately centered about the sixth horizontal graticule line on the CRT.
Total deviation of trace from 9 to 15
GHz should not exceed 3.6 dB.
6 to 16
GHz
Adjustment
53. Change synchronizer POLARITY to
-
.
54. Change spectrum analyzer Amplitude Scale to 10 dB/DIV and FREQUENCY BAND GHz to 6
-
15.
55. Adjust sweep oscillator for swept output from 6 to 15
GHz.
56. Adjust Thing Voltage Circuit GAIN and OFFSET controls to phase
-
lock swept signal from 6 to 15 GHz.
Refer to Figure 5
-
19e.