HP 8112A, Operating, Programming And Servicing Manual

Page: 189 / 406

Amplitude Tests
Shaper Output State
E36
When software triggered (low), fall time of 1 ms (Range 6) out of
limits. Possible faults in trailing edge slope control circuit U13, U14
or U302. See E:hapter 10.5.
E37
When software triggered (high), rise time of 9.99 ms (Range 6) out of
limits. Possible faults
as
in E35.
E3tl
When software triggered (low), fall time of 9.99 ms (Range 6) out of
limits. Possible faults
as
in E35.
E39
When software triggered (high), rise time of 10 ms (Range 7) out of
limits. Possi� faults as in E35.
E41
Amplitude range 2
(
9.99 V
)
not possible. Possible faults:
•
Pre-attenuator circuit
•
Amplitude control circuit U23 to U25
•
Offset control circuit U20 to U22
See Chapters 10.5 and 10.4.
Test
E42
Amplitude range 1
(
1 V
)
not possibl�. Possible faults as in E41 .
Burst Tests
HP 8 1 1 2A set to produce a burst of 10 pulses of period 250 µs.
E5 1
Burst counter supplies less than 10 pulses. Possible fault in Burst
flip-flop U201 or Burst control circuit U102 to U 1 12. Refer to
Chapter 10.6.
E52
Burst counter produces more than 10 pulses. Possible faults
as
in
E51 .
Instrument Overview and Treubleshooting Guide 10.1-9