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
IFC TEST FAILURE
"IFC DID NOT PROPERLY RESET
Failure of control bus latch, HP-IB
CONTROL BYTE"
transceiver, or control logic.
"TRIED TO SET ATN EOI, AND
Failure of control logic or HP-IB trans-
TO CLEAR REN SIMULTANEOUSLY,
ceiver.
BUT COULD NOT.
C O N T R O L BYTE IS _ , IT
SHOULD BE 260(OCT)"
SELF-ADDRESS TEST FAILURES
" IUT DOES NOT BECOME ACTIVE
( 1 ) Failure of computer PCA A1.
TALKER WHEN ADDRESSED"
(2) System controller switch is set in-
correctly or failed.
(3) Failure of processor or interrupt
logic.
"IUT DOES NOT BECOME ACTIVE
S a m e as items (1)-(3) above.
LISTENER WHEN Addressed
HANDSHAKE TEST FAILURES
"DIO LINES ARE BAD, TRIED TO
(1) Failure of select code switch or set
ADDRESS THE TEST CARD WITH
incorrectly.
BUT IT DID NOT RECOG-
NIZE ITS ADDRESS" "CHECK TO
( 2 ) Failure of bus ADDRESS switch or set
BE SURE CABLE IS CONNECTED"
incorrectly.
Example:
"HANDSHAKE FAILURE. IUT
(1) Failure of control or interrupt
IS ACTIVE (LISTENER or
logic.
TALKER)"
(2) Failure of system controller switch
DAV = 0
or switch is set to off.
NRFD = 0
(3) Select code switch is set incor-
NDAC = 0
rectly.
SHOULD BE:
DAV = 0
NRFD = 1
NDAC = 1
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