HP 8559A Operation And Service Manual page 187

/ - -
5-17. POWER SUPPLY CHECKS AND ADJUSTMENTS (SERIAL PREFIX 2236A)
REFERENCE:
A7, A8, A9 Schematics
DESCRIPTION:
+
-
The
is checked for proper dc output with less than
+
The
Offset) voltage on Marker Assembly A8 is adjusted. The
during the first five minutes after the spectrum analyzer is turned on (cold instrument). However, the
-
and
EQUIPMENT:
Digital Voltmeter
PROCEDURE:
1. Connect equipment as shown in Figure 5-1. Install Frequency Control Assembly A7 on extender board
and connect digital voltmeter to A7TP3
2. Adjust A7R52
3. Connect digital voltmeter to A7TP2 and adjust A7R55
- 10.000 0.005 volts.
4. Check for - 12.0
5. Select FREQUENCY BAND GHz .01- 3 and tune from 0 to 3 while monitoring the - 12V at collector of
ADJUSTMENTS
DISPLAY
FIGURE 51. POWER SUPPLY CHECKS AND ADJUSTMENTS TEST SETUP
.
. . .
. . . . . . . . . .
+
+
50 mV variation when tuning the HP 8559A from 0 to 3 GHz.
+
.
.
DIGITAL VOLTMETER
SPECTRUM
EXTENDER
ASSEMBLY
. . . . . . . . .
. . . . . . . . . . . . . . . .
+
-
50 mY
+
. . . . . . . . . . .
. . . . .
HP 349OA
,