Keithley 237

SECTION3
IEEE-488
Reference
3-64
+
Trigger
Overrun-
Set
when
the instrument receives a trigger while
it
is still proc-
essing the action of a previous trigger. The TRIG OVERRUN message is displayed
and
the additional trigger is ignored.
IDOC-
Set
when
an
illegal device-dependent command
(IDOC) is received (such
as the
"E"
in
E1X).
The
IDOC message is displayed; commands
up
to
and
including
the next X are ignored.
IDOCO
- Set
when
an
illegal device-dependent command option
(IDOCO)
is re-
ceived (such as the
"3"
in
F3,0X).
The IDOCO
message is displayed; commands
up
to
and
including the next X
are
ignored.
Interlock
Present-
Set
when
one of
two
error conditions exists:
•
An
operate/standby
command (N)
was
attempted
when
an
interlock condition
was
present. The
INTERLOCK
PRESENT message is displayed
and
theN
com-
mand
is ignored.
•
An
interlock condition presents itself
when
the
unit
is
in
operate. The INTER-
LOCK
PRESENT message is displayed
and
the source-measure
unit
goes to
standby.
illegal
Measure
Range-
Set
when
the selected measure range is incompatible
with
the source
and
instrument
(L
command). Valid range values are:
0-4
(measure
V
on
237)
0-3
(measure
V
on
236
or
238)
0-9
(measure I
on
236
or
237)
0-10
(measure I
on
238)
The instrument displays
an
ILLEGAL MEAS RANGE message;
pending
DOCs
are
ignored;
no
execution action is taken.
illegal
Source
Range-
Set
when
the selected source range is incompatible
with
the
source
and
instrument (A,
B,
and
Q
commands). Valid range values are:
0-4
(source V
on
237)
0-3
(source V
on
236
or
238)
0-9
(source I
on
236
or
237)
0-10
(source I
on
238)
The instrument displays
an
ILLEGAL SRC RANGE message;
pending
DDCs are ig-
nored;
no
execution action is taken.
Invalid Sweep
Mix-
Set
when
you
create a sweep from one group,
then
try
to
ap-
pend
a sweep from the other group. (The sweep types
are
grouped
as pulsed
and
non-pulsed.) The instrument displays
an
INVALID SWEEP
MIX
message; pending
DOCs
are ignored;
no
execution action is taken. Affected DDC is
Q.
Log Cannot Cross
Zero-
Set
when
you
attempt to create or
append
a log sweep that
passes through zero. (Since zero is assumed to
be
positive, a log sweep cannot have a
+