Agilent Technologies HP 8566B Spécifications Page 311

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Vue de la page 310
20. Last Converter Adjustments
Note
A6A3AlC23
10.7
MHz
NOTCH
FILTER ADJUST
I
L
A6A3ilC12
A6A3A.lClO
A6A3ilC8
RIGHT
ASSE&L
I ES
A6A3
SIDE
LAST
COVER
COVER CONVERTER
\
,
Y
321.4 MHz BPF ADJUST
Figure 3-88. Location of Last Converter Adjustments
10. Set the spectrum analyzer LINE switch to ON, and key in
C-1,
SWEEP
[m).
A HET UNLOCK message should
appear on the CRT display.
11. Connect a BNC to SMB snap-on test cable and probe (SMB male
bulkhead connector) to the RF INPUT of the second spectrum
analyzer.
12. Press
(2--22GHz)
on the second spectrum analyzer. Set the controls
of the second spectrum analyzer as follows:
CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.321.4
MHz
FREQUENCY SPAN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.500
kHz
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 dBm
13. Press
1-j
on the synthesized sweeper, and key in
Icw)
321.4
MHz, [POWER
LEVEL)
-20.0
dBm.
Connect the RF OUTPUT of the
synthesized sweeper to A6A3Jl 321.4 MHz IN using a second BNC
to SMB snap-on test cable.
In the following steps, an SMB male bulkhead connector is used as
an input probe for the second spectrum analyzer. The probe tip is
partially inserted through access holes in the bottom cover of the
A6A3
Last Converter Assembly. If the probe tip is allowed to touch
one of the adjustable capacitors, false readings will result as indicated
by a sudden jump in the amplitude of the 321.4 MHz signal displayed
on the second spectrum analyzer.
14. Partially insert the probe connected to the second spectrum
analyzer into the access hole above
A6A3AlC9
(the second access
hole from the right). Using a non-metallic adjustment tool, adjust
A6A3AlC8 (the right-most of the five access holes) to maximize
the amplitude of the 321.4 MHz signal displayed on the second
spectrum analyzer.
Adjustments 3-17 1
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