HP 1317A Operating And Service Manual page 85

Model 1317A
Table 8-10. Dynamic Astigmatism Measurement Conditions
DC VOLTAGE MEASUREMENT CONDITIONS
1. Disconnect all inputs from X-, Yo, and Z-INPUT con-
nectors.
2. Adjustments:
Z-axis GAIN (A5R20) ..... ......... .... ...... fully cw
Z-axis BAL (A5R65) .. ... Equal voltages at emitters of
A5Q3 and A5Q4
3. Control settings:
POSN X . . ... . . .... ........... ........ . .. ... Centered
POSN Y .... ........... ... ..... ............. Centered
GAIN X .. ..... ....... ........ . . . ... . ...... . . fully cw
GAIN Y . . .............. ... . ....... ... .... ... fully cw
INTENSITY . . ... .......... +7.0V at Test Point A5TP1
P/OA6 FOCUS ASTIGMATISM BO.
t
- 15VB
COMMON
BASE OUTPUT
AMPLIFIER
Q21
I
P/OA7
1
~/~~:
I I I +1 5V
I
P/ OXA6 ;
:~~
P/ OW4
:~o~1
CW · A7
s.:~'V\r_.l\/V'v-fI-------------~
5
>
I )
9
>
e
<
F 5000
ASTIG . .
C14 TP2 I I (956)
lUll
~O. lUF
+14V a21 +93V
~----------------~--------~~
A96
10K
I P/O
t
~
I
XA7 (2) : - 15V
15)>-1-1
----1)
B>--fr +250V
I r
~
: P/ OW4
~ A~T~G
I
I I
L..--~1 3)-l. .
~
""'"
'"'
+15V~
--'VV'v1
C15
J
O . IUF
A97
47 -
8
+15VFB ~--W
...L
C16
Io.1UF
-=
A98
47 -
8
- 15VFB~-W
J...
C17
I
I
1=
O.IUF
_____
' 3 _ ' , . ! ~ ~ ' "
I
PAATS ON THIS SCHEMATIC
P/OA6 CHASSIS P/OA9
CI2·17
P/ OW4 A7
CA 17·28
P/ OXA7,9
Q13·21
A54·98
TP2
Service
9
Figure 8-18.
Astigmatism Circuit
8-23