Agilent Technologies HP 8566B Especificaciones Pagina 173

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Warning
2. High-Voltage Adjustment (SN 3001A and Below)
be performed with the DVM manually set to the 100 V range
(*OO.OOO
on the HP 3456A display).
AlA
HIGH
VOLTAGE
REGULATOR
,
AlA8DSl
+
AlA7TP3
.
AlA6R32
Figure 3-6. Location of High Voltage Adjustments
4. Set the spectrum analyzer LINE switch to ON. Set the front-panel
INTENSITY control fully counterclockwise (CRT beam at cut-off)
to prevent possible damage to the CRT.
5. Note
.the
DVM indication at AlA7TP3.
DVM Indication:
6. Connect the high-voltage probe to the DVM. Connect the probe to
AlA7TP3.
7. Note the DVM indication.
DVM Indication:
8. Divide the DVM indication in step 7 by the DVM indication in
step 5. This gives the calibration factor needed to compensate for
high-voltage probe error.
Calibration Factor:
9. Disconnect the high-voltage probe from
AlA7TP3.
Set the
spectrum analyzer LINE switch to STANDBY. Remove the ac line
cord from both instrument sections.
The MAINS power-on indicator
AlASDSl
(red LED) should
be completely off before proceeding with this procedure. See
Figure 3-6. The indicator will remain lit for several seconds after
the ac line cord has been removed, and will go out slowly (the
light becomes dimmer until it is completely out).
Warning
With the protective cover removed in the following step, do not
place hands near the
AlA
High-Voltage assembly. High voltage
(approximately -4000 V dc) can be present even when the ac line
cord is disconnected.
Adjustments 3-33
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