TM 5-6675-320-14
Table 4-26. HP-16 ERROR DISPLAYS AND POSSIBLE CAUSES - Cont
D i s p l a y o r P r i n t o ut
Possible Causes
IFC TEST FAILURE
“ IFC DID NOT PROPERLY RESET
Failure of control bus latch, HP-IB
CONTROL BYTE”
t r a n s c e i v e r , o r c o n t r o l l o g i c.
“TRIED TO SET ATN EOI, AND
Failure of control logic or HP-IB trans-
TO CLEAR REN SIMULTANEOUSLY,
c e i v e r .
BUT COULD NOT.
CONTROL BYTE IS
,
IT
SHOULD BE 260(OCT)”
SELF-ADDRESS TEST FAILURES
"IUT DOES NOT BECOME ACTIVE
TALKER WHEN ADDRESSED”
“IUT DOES NOT BECOME ACTIVE
LISTENER WHEN ADDRESSED”
“DIO LINES ARE BAD, TRIED TO
ADDRESS THE TEST CARD WITH
BUT IT DID NOT RECOG-
NIZE ITS ADDRESS” “CHECK TO
BE SURE CABLE IS CONNECTED”
Example:
“HANDSHAKE FAILURE. IUT
IS ACTIVE (LISTENER or
TALKER)”
DAV = 0
NRFD = 0
NDAC = 0
SHOULD BE:
(1) Failure of computer PCA A1.
(2) System controller switch is set in-
c o r r e c t l y o r f a i l e d .
( 3 ) F a i l u r e o f p r o c e s s o r o r i n t e r r u pt
logic.
Same as items (1)-(3) above.
HANDSHAKE TEST FAILURES
(1)
( 2)
(1)
( 2)
( 3)
Failure of select code switch or set
i n c o r r e c t l y .
Failure of bus ADDRESS switch or set
i n c o r r e c t l y .
F a i l u r e o f c o n t r o l o r i n t e r r u pt
l o g i c .
Failure of system controller switch
o r s w i t c h i s s e t t o o f f.
Select code switch is set incor-
r e c t l y .
DAV = 0
NRFD = 1
NDAC = 1
4-246
