HP 8112A Operating, Programming And Servicing Manual page 222

10.3-20 Servicing the Timing and
Slope Generators
Figure 10.3-14. Width Generator ramp signal
4. Check the signal being sent to the slope generator IC at TP3
against Figure 10.3-15.
D E
200us
Figure 10.3-15. Width Generator output
5. Check the Width Generator operation against Table 10.3-14 and
Table 10.3-15
Table 10.3-14. Width Generator Operation
Mnemonic
WIDC
ERW
LD7 - LDO Data to be latched into
w v c
6. Verify that voltage at U240 pins 1, 4 and 5 are at virtual ground
L M
Description
Width control voltage input
Width error output signal
Width input store select
the input store of U240
Width Vernier Current
O D E
State
L
L
See Table 10.3-l
See Table 10.3-2
See Table 10.3-15