Typical Coarse Frequency Response (5.8 Ghz - - HP 8566B Adjustment Manual

peaks of these responses coarsely outline the spectrum analyzer
frequency response.
S T A R T 5.88 GHZ
q W 3 MHZ q W 3 MHZ
Typical Coarse Frequency Response (5.8 GHz - 12.5 GHz) Typical Coarse Frequency Response (5.8 GHz - 12.5 GHz)
It might be helpful to temporarily change the spectrum analyzer
@ ]
setting while adjusting frequency response, particularly
WEEP TIME
when making fine adjustments. An increase in spectrum analyzer
sweep time results in closer spacing of the displayed responses, but
slows the adjustment. Do not decrease the
98. Gradually adjust (Band C Lower Segment) A6AllR54 Cl and
(Band C Upper Segment) A6AllR72 C2 for maximum flatness of
the displayed signal responses. The adjustments are interactive,
with A6AllR54 Cl having the most effect on the level of the
displayed signals below mid-band (approximately 9.1 GHz),
and A6Al lR72 C2 having the most effect on the level of
the displayed signals above mid-band. Adjust A6AllR54 Cl
counterclockwise to increase the level of the displayed signal
responses below mid-band. Adjust A6Al lR72 C2 clockwise
to increase the level of the displayed signal responses above
mid-band. See Figure 3-90 for the locations of A6AllR54 Cl and
If the displayed signals at the high end of the band drop off by more
than 2-3 dB, center A6AllR72 C2 and proceed to step 99.
99. On the spectrum analyzer, key in
(
ENTER
TRACE B (jj], [HOLD).
100. Readjust 17-turn (YTX Diode Bias) potentiometer A6AlOR15 VC
to maximize the overall level of the displayed signal responses
from 5.8 GHz to 12.5 GHz on the spectrum analyzer display.
Then, adjust A6AlOR15 VC clockwise until signal responses at
the high end of the band drop in amplitude by approximately 0.5
2 1. Frequency Response Adjustments
3 MHZ 3 MHZ
Figure 3-97. Figure 3-97.
( )
SWEEP TIME
(
SWEEP
(
4,
SWEEP TIME
Adjustments 3-191
2.00 set 2.00 set
setting below
]