Keithley 194 Instruction Manual page 209

Table 7-15. A/D Converter Checks (Cont.)
step Item/Component
34 U3?l, pin 12
35 U37I, pin 16
36 Range
37 VOLTAGE INPUT jack
38 Tl'l (Near A/D/11)
39 DC calibrator
40 TPl
41 Display
42 U376, pins 3-6, 11.14
43 U385, pins 3-6, 11-14
44 DC calibrator
45
Display
46 U376, pins 3-6, 11-14
47 U385, pins 3-6, 11-14
Required Condition Remarks
Data burst pulses every 10rsec. Odd serial data.
500nsec negative-going pulse A/D trigger pulse.
every 10psec during
measurement.
Select 3.2V range.
Apply +3.2767V Use DC calibrator.
+5.oov Sample/hold input
Select -3.2768V output. -full range input.
-5.oov Sample/hold input
Adjust for -3.2768V on 194
display.
All pulse low during Odd bit A/D data with -full
measurement. range input.
All pulse low during Even bit AID data with +full
measurement. range input.
Select +3.2767V output. +full range input.
Adjust calibrator for +3.2767V
on 194 display.
All pulse high during
Odd bit data with +full range
measurement.
input.
All pulse high during Even bit data with +full range
measurement. input.
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