Keithley 237

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SECTION3
IEEE-488
Reference
3.
Commas
are
required
delimiters, except as
noted
in
the
A
and
C commands.
Omission
of
any
of
the
five
commas
in
the
Q1
command
causes
an
IDDCO.
For
example,
to
change
only
a
step
value
while
leaving
the
start, stop, range,
and
de-
lay
values
unchanged,
the
following
command
string
would
be
used:
Q1,2,X
In
this case,
the
commas
mark
positions
where
the
start, stop, range,
and
delay
values
are
omitted.
Order
of
Command
Execution-
Device-dependent
commands
are
not
necessarily
executed
in
the
order
received. Rather,
the
instrument
always executes
them
in
a spe-
cific order,
as
summarized
in
Table 3-5.
Table
3-5.
Order
of
Command
Execution
Order
Command
Description
1 M Set
the
SRQ
mask
2
c
Calibration sequence
3
F
Set
source
and
function
4
0
Program
local/remote
sense
5
p
Select filter
6
z
Program
suppression
7
s
Set integration time
8
w
Enable/
disable
default
delay
9
L
Program
compliance
10
B
Program
bias
operation
11
Q
Create/append
sweep
list
12 A
Modify
sweep
list
13 T
Select trigger configuration
14
R
Enable/
disable triggers
15 N
Select
operate/
standby
mode
16 D
Display a
user
message
17
y
Select
terminator
characters
18
K
Select
EOI
and
hold-off
on
X
19
G
Select
output
data
format
20
v
1100V
range
control
21
J
Execute self-tests
22
u
Request
status
23
H
Send
IEEE
immediate
trigger
24 X Execute
DOCs
If
you
wish
to
force a particular
order
of
execution,
simply
include
the
execute
(X)
character after each
command-option
grouping
in
the
command
string. For example,
the
following
string
would
be
executed
in
the
received order:
ROXF1,1R1N1HOX
If
the
previous
statements
did
not
have
an
X
immediately
following
RO,
the
RO
com-
mand
would
not
have
been
executed, because
the
Model236/237
/238
will
execute
the
last received
option
for
repeated
commands
in
the
same
string.
Device-dependent
Command
Summary
- All
Model
236/237/238
device-de-
pendent
commands
are
summarized
in
Table 3-6,
which
also lists respective
para-
graphs
where
more
detailed information
on
each
command
may
be
found.
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3-13