Width Generator 1 - HP 8112A Operating, Programming And Servicing Manual

Note

Width Generator 1.

Table 10.3-12. Delay Generator Operation
5 DELC
2 ERD
10 DIC
11 to 18 LD7 - LDO Data to be latched into
DVC
R226
6 . Verify that voltage at U220 pins 1 , 4 and 5 are at virtual ground
Delay Vernier Current can be checked by measuring the voltage
across R226.
7. Set HP 8112A PER to 20 ms
Delay
8. Check the Generator levels against Table 10.3-13
Table 10.3-13. Delay Generator Signal Levels
Set up the HP 8112A as follows:
RCL 0
DEL 650 ps or
DBL
200 ps
2.
Check the input signal from the delay generator at TP2 (pin 7 of
DEL 658~s
Figure 10.3-13. Width Generator Input
3. Check the ramp signal at pin 20 of U240 against Figure 10.3-14.
Description
Delay control voltage input
Delay error output signal
Delay input store select
the input store of U220
Delay vernier current
Servicing the Timing and 10.3-19
Slope Generators
State
L
L
See Table 10.3-l
See Table 10.3-2
See Table 10.3-13