TM 5-6675-318-14
P o s s i b l e Causes
Display or Printout
IFC TEST FAILURE
Failure of control bus latch, HP-IB
" IFC DID NOT PROPERLY RESET
transceiver, or control logic.
C O N T R O L BYTE"
Failure of control logic or HP-IB trans-
"TRIED TO SET ATN EOI , AND
ceiver.
TO CLEAR REN SIMULTANEOUSLY,
BUT COULD NOT.
, IT
CONTROL BYTE IS
SHOULD BE 260(OCT)"
SELF-ADDRESS TEST FAILURES
( 1 ) F a i l u r e of computer PCA A1.
" IUT DOES NOT BECOME ACTIVE
TALKER WHEN ADDRESSED"
(2) S y s t e m c o n t r o l l e r s w i t c h i s s e t i n -
correctly or failed.
Failure of processor or interrupt
(3)
logic.
S a m e as items (1)-(3) above.
"IUT DOES NOT BECOME ACTIVE
LISTENER WHEN ADDRESSED"
HANDSHAKE TEST FAILURES
"DIO LINES ARE BAD, TRIED TO
(1) Failure of select code switch or set
incorrectly.
ADDRESS THE TEST CARD WITH
BUT IT DID NOT RECOG-
( 2 ) Failure of bus ADDRESS switch or set
NIZE ITS ADDRESS" "CHECK TO
incorrectly.
BE SURE CABLE IS CONNECTED"
Example:
(1) Failure of control or interrupt
"HANDSHAKE FAILURE. IUT
logic.
IS ACTIVE (LISTENER or
TALKER)"
(2) Failure of system controller switch
or switch is set to off.
DAV = 0
NRFD = 0
(3) Select code switch is set incor-
NDAC = 0
rectly.
SHOULD BE:
DAV = 0
NRFD = 1
NDAC = 1
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