HP 3562A Service Manual page 135

O D E L 3562A
Special note: capacitive load may be used to reduce noise on the scope display in the
fol lowing adjustment. This part is not req u i red to perform this adjustment, but it does
make it easier to evaluate the resu lts the first few times through the procedu re. It con­
A
sists of a capacitor between the scope i nput and ground. It is made using a
m ica capacitor and two panel-mount BNC connectors; one female and one male. The
H P part numbers for these parts and a d rawing showing construction appear in figu re
Figure 3-3 Capacitive load
Instrument power should alwa ys be turned off before any boards
are remo ved or installed. Failing to do so causes circuit failure in
Procedu re:
most cases.
1 . Disconnect the
Remove the ADC board to be adj usted and place it on the extender board.
3. Reconnect the li ne power cord and turn the power switch ON.
2 .
4. Connect
DAC.
A32TP400
5. Remove the coaxial cable connected to
to with the BNC-to-SM B adapter cable. Set the synthesizer for a
triangle wave at
A32j 200
Connect the scope to
SYNC output of the synthesizer to the MAI N TRIG input of the scope. The scope shou ld
be set for 2 mV/d iv,
6 .
7. Press the fol lowing keys in the order given:
PRESET
RA N G E
SPC L FCTN
Item
1
2
3
4
5
CA UTION
ine power cord from the rear panel of the H P
I
to a grou nd test point with a shorting clip. This disables the offset
Hz.
with a 1 :1 probe and a capacitive load. Connect the
200
ms/div, ac cou p l ing, BW l i m it on, and externally triggered.
A32T P401
2
. . . . R E S E T
. . . . . . . d BVrms
B E E PER O N/O FF
. . . . 7
BE E P E R ON/OFF
Q ty. Description
1
3300 pf cap
1 male BNC
female BNC
1
2 solder lugs
2 hex nuts
and con nect the synthesizer output
A32J 200
E NTER (D ither off)
E NT E R (2 nd pass only)
66
-
- 69
ADJ USTM E NTS
pf si lver
3300
3-3.
HP PIN
01 60-2230
1 250-0045
1 250-001 8
0360 - 1 632
2950-0043
3562A.
mVp-p
30
3-7