TM 5-6675-323-14
Table 3-26. HP-IB ERROR DISPLAYS AND POSSIBLE CAUSES - Cont
Display or Printout
P o s s i b l e Causes
PASS CONTROL FAILURES
Failure of computer interrupt circuit
" INTERFACE DOES PASS CONTROL,
BUT DOES NOT ITSELF RELIN-
on PCA A1 or processor interrupt circuit
QUISH CONTROL"
on PCA A2.
(1) Cable is disconnected or loose.
" INTERFACE DOES NOT PASS
CONTROL, BUT DOES ITSELF
(2) F a i l u r e o f i n t e r r u p t c o n t r o l c i r -
RELINQUISH CONTROL. CHECK
cuit on PCA A2.
TO BE SURE CABLE IS CONNECTED"
(1) F a i l u r e o f i n t e r r u p t c i r c u i t s o n
"INTERFACE NEITHER PASSES
both cards.
NOR RELINQUISHES CONTROL"
(2) Failure of microprocessor.
EXTERNAL ADDRESS FAILURES
(1) Failure of output data or control
"IUT CANNOT BE ADDRESSED AS
bus latch circuits on PCA A2.
A TALKER BY ANOTHER CONTROL-
"
LER.
STATUS BYTE IS
(2) Failure of microprocessor.
(1) Failure of data input multiplexer,
"IUT CANNOT BE ADDRESSED AS
control bus latch, or interrupt cir-
A LISTENER BY ANOTHER CON-
c u i t s on PCA A2.
TROLLER. STATUS BYTE IS
"
(2) Failure of microprocessor.
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