Hp-Ib Interface Electronics System Troubleshooting - HP 5501A Operating And Service Manual

Table 6-7. HP-IB Interface Electronics System Troubleshooting (Cont'd)
DATA ERRORS
Incorrect display or printout results when the measurement optics are displaced a known distance:
SYMPTOM CAUSE ACTION
No movement indicated Coupler interface 1. 10745: check
on all measurement card not placing HP-IB address
axes. instructions on
coupler backplane. 2. Replace or
troubleshoot
10745, or 1 / 0
from coupler
to controller.
System malfunctions 1. 10760A counter 1. Using logic
in extended reso- fails to re-
probe, verify
lution ceive extended
10760A receives
resolution corn- extended reso-
(e.g., laser mand or reso- lution command.
readings are 6 or lution circuitry (U47 (9) on 10760
10 times greater is malfunctioning. should be a T T L
or less than known high if in ex-
measured distance) 2. 10760A resolu- tended resolution)
tion jumpers are
incorrectly set
2. If command not
received, check
proper command
decoder output
on 10760 with
logic probe.
3. Replace inter-
face card.
4. if command re-
ceived, verify
10760A is
correctly jum-
pered for desired
resolution.
5.
Replace 10760A
card.
No movement 10760A Mal- If possible,
indicated on function substitute
one but not all 10760A from
axes. other axis.