HP HP 8566B, Руководство по настройке

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2 1. Frequency Response Adjustments
70. Set the synthesized sweeper controls as follows:
START FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STOP FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.8
RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
LEVELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XTAL
SWEEP TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ms
SWEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONT
71. On the spectrum analyzer, key in TRACE A
[
CLEAR
-
WRITE
),
TIME
] MARKER (OFF), As the spectrum
analyzer completes each sweep, a series of approximately 22 new
responses should be displayed, as shown in Figure 3-95. The
peaks of these responses coarsely outline the spectrum analyzer
frequency response.
Figure 3-95.
Typical Coarse Frequency Response (2 5.8
72. Gradually adjust (Band B Lower Segment) and
(Band B Upper Segment) B2 for maximum flatness of
the displayed signal responses. The adjustments are interactive,
with
having the most effect on the level of the
displayed signals below mid-band (approximately 3.9
and
B2 having the most effect on the level of
the displayed signals above mid-band. Adjust Bl
counterclockwise to increase the level of the displayed signal
responses below mid-band. Adjust
B2 clockwise
to increase the level of the displayed signal responses above
mid-band. See Figure 3-90 for the locations of
and
B2.
It might be helpful to increase or decrease the spectrum analyzer
TIME
)
setting while adjusting B2 and
particularly when making fine adjustments. An increase in spectrum
analyzer sweep time results in closer spacing of the displayed
responses, but slows the adjustment.
Adjustments 3-187