TM 5-6675-320-14
Table 4-26. HP-IB ERROR DISPLAYS AND POSSIBLE CAUSES - Cont
D i s p l a y o r P r i n t o ut
Possible Causes
PARALLEL POLL FAILURE
“IUT DID NOT CONDUCT PARALLEL
( 1)
POLL CORRECTLY . NO “SRQ” WAS
PRESENT AND POLL RETURNED
( 2)
( 3)
“IUT DID NOT CONDUCT PARALLEL
( 1)
POLL CORRECTLY; “SRQ” WAS
PRESENT; POLL RETURNED ,
(2)
SHOULD HAVE BEEN 2“
( 3)
F a i l u r e o f p a r a l l e l p o l l l o g i c on
PCA A1.
P a r a l l e l p o l l l o g i c s w i t c h i s s et
i n c o r r e c t l y .
F a i l u r e o f p a r a l l e l p o l l l o g i c , o u t -
put data latch, or control bus latch
on PCA A2.
P a r a l l e l p o l l s w i t c h i s m i s s e t .
F a i l u r e o f p a r a l l e l p o l l l o g i c on
PCA A1 and A2.
Failure of ROM U1.
“IUT DID NOT RESPOND CORRECTLY
F a i l u r e o r w r o n g s e t t i n g o f p a r a l l el
TO PARALLEL POLL. RESPONSE WAS
p o l l s w i t c h.
, SHOULD HAVE BEEN 1.
CHECK PARALLEL POLL SWITCH
SETTING--SHOULD BE 1“
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