Output Amplifier Tests
E2
1
Offset generator is unable to produce positive offset. Possible failure
in Output amplifier or offset control circuit U l 7 to Ul9, U20 to U22,
or U27. See Chapter 10.4.
E22
Offset generator is unable to produce negative offset. Possible failures
as E21 .
Overall Tests, Static
These tests check pulse generation using the level check circuits.
E3
1
When software triggered
(
low
)
, a fixed mode negative pulse is not
detected. Possible failure in signal transfer between:
•
Period generator U200
•
Delay generator U220
•
Width generator U240
•
Slope generator U301
•
Shaper IC U401
and output pre-attenuator and amplifier. Refer to Chapters 10.5,
10.3 and 10.4.
E32
When software triggered
(
low
)
, a fixed mode positive pulse is not
detected. Possible failures as in E31 .
E33
When software triggered
(
high
)
, a fixed mode negative pulse is not
detected. Possible failures as in E31 .
E34
When software triggered
(
low
)
, a linear mode negative pulse is not
detected. Possible failures as in E31 .
Overall Tests, Dynamic
These tests check the accuracy of the output pulse rise and fall times
in normal output mode.
E35
When software triggered
(
high
)
, rise time of 1 ms
(
Range 6) out of
limits. Possible faults in leading edge slope control circuit U12, U14
or U302. See Chapter 10.5.
Instrument Overview and Troubleshooting Guide
1o.1-
7
Summary of Contents for 8112A
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Page 290: ...R B c R3 BD RY M I CROPROCESSOR 1 2 3 FIGURE 1 0 7 8 ...
Page 294: ... 8 X2l 2 X2 Figure A 1 Mechanical Parts 1 A 2 Replaceable Parts ...
Page 295: ...MP MP3 MP MP2 MP4 MPS MP 1 2 MPS MP MP I B ElElElEl Replaceable Parts A 3 ...
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Page 378: ...Figure B 14 Mechanical Parts 1 B 44 Backdating ...
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