5-4
5
TABLE 5-1 TROUBLESHOOTING GUIDE (CONT.)
Possible
Symptom
Fault
Action or Check
Symptom
Fault
Action or Check
Symptom
Fault
Action or Check
Message not sent
Missing terminator All device messages must be
Message not sent
Missing terminator All device messages must be
Message not sent
Missing terminator All device messages must be
to LAN instrument
terminated with a LF and
to LAN instrument
terminated with a LF and
to LAN instrument
terminated with a LF and
EOI asserted on the last byte.
Verify the GPIB Controller
settings.
settings.
settings.
No response from
Instrument not
Verify that the instrument's
No response from
Instrument not
Verify that the instrument's
No response from
Instrument not
Verify that the instrument's
N4865A
Responding
error indicator is not on.
N4865A
Responding
error indicator is not on.
N4865A
Responding
error indicator is not on.
Response Terminator Device message to the GPIB
Response Terminator Device message to the GPIB
Response Terminator Device message to the GPIB
Controller only terminated with
EOI asserted on the last char-
acter. Check GPIB Controller
read terminator settings.
Missing instrument Instrument did not get a query.
Missing instrument Instrument did not get a query.
Missing instrument Instrument did not get a query.
response data
or has not response data. See
response data
or has not response data. See
response data
or has not response data. See
program error above
Instrument did not respond.
Instrument did not respond.
Instrument did not respond.
Check GPIB program and
instrument manual for correct
programming and commands.
Does not get all data Instrument was not asked for
Does not get all data Instrument was not asked for
Does not get all data Instrument was not asked for
in a large message
additional data. Verify that the
in a large message
additional data. Verify that the
in a large message
additional data. Verify that the
N4865A was not addressed
as listener and sent a device
message, a Device Trigger or a
Device Clear after talking out
the fi rst data.
Missing data bytes
Controller using ATN holdoff.
Missing data bytes
Controller using ATN holdoff.
Missing data bytes
Controller using ATN holdoff.
when reading large when doing partial reads.
when reading large when doing partial reads.
when reading large when doing partial reads.
fi les.
Change read size to a multiple
fi les.
Change read size to a multiple
fi les.
Change read size to a multiple
of 1024 bytes
Device command
Serial poll the device or read
Device command
Serial poll the device or read
Device command
Serial poll the device or read
error
its Event Status Register to
error
its Event Status Register to
error
its Event Status Register to
determine reason for no
determine reason for no
determine reason for no
response.
response.
response.
N4865A reverts to
Confi guration
Press Save and Reboot
N4865A reverts to
Confi guration
Press Save and Reboot
N4865A reverts to
Confi guration
Press Save and Reboot
factory settings at
settings not saved
after changing the N4865A's
factory settings at
settings not saved
after changing the N4865A's
factory settings at
settings not saved
after changing the N4865A's
power turn-on
confi guration
power turn-on
confi guration
power turn-on
confi guration
Summary of Contents for N4865A
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