Keithley 237 - 4.2.4 Resonant Converter (Model 237); 4.3 A;D CONVERTER

To
select a
different
source
range,
use
the
SELECT
but-
tons.~
SELECT
upranges
and
SELECT
...,.
downranges.
Note
that
if
you
select a
range
that
cannot
accommodate
the
present
source
value,
the
Source
Measure
Unit
will
default
to
the
maximum
value
for
the
that
range.
NOTES
1.
Anytime
SOURCE MEASURE
is
pressed,
the
follow-
ing
actions
will
occur:
A.
The
displayed
source
value
will
default
to
zero
(O.OOOOV
or
OOO.OOmA).
B.
The
MANUAL
TRIGGER
light
will
start
blink-
ing.
The
Source
Measure
Unit
will
not
display
the
programmed
source
value
until
a
trigger
oc-
curs
(i.e.
MANUAL
TRIGGER
button
pressed).
C.
If
the
Source
Measure
Unit
was
in
operate,
it
will
go
into
standby.
2.
Anytime
FUNCTION
is
pressed,
the
following
ac-
tions
will
occur:
A.
The
MANUAL
TRIGGER
light
will
start
blink-
ing.
B.
If
the
Source
Measure
Unit
was
in
operate,
the
source
will
still
be
applied
to
the
output
but
it
will
not
be
measured
(i.e.
"+
1.0000 V
-.-rnA").
To
resume
measurements,
the
Source
Measure
Unit
must
be
in
the
de
function
and
a
trigger
must
occur.
3. A
de
function
source
value
cannot
be
set
if
in
the
sweep
function
except
with
the
bias
parameter
of
the
sweep.
4.
When
power
is cycled
the
de
function
will
be
se-
lected.
The
source
(V
or
I),
bias
value,
and
range
will
power
up
to
whatever
was
previously
programmed.
5.
Factory
initialization
will
place
the
unit
in
V-source,
de
function,
with
a
source
value
of
OV,
on
the
11
V
or
15V range.
The
I-source
will
be
set
to
source
OmA
on
the
lOrnA
range.
6.
When
a
source
range
change
occurs,
the
Source
Measure
Unit
will
momentarily
output
OV
or
OmA.
This
could
create
an
undesirable
transient
in
an
oth-
erwise
smooth
sweep.
In
situations
where
the
tran-
sient
is
not
tolerable, a fixed
source
range
should
be
used
to
eliminate
range
changes.
IEEE-488
Bus
Operation
The
F
command
is
used
to
program
source
and
function.
FO,O
=
Source
V
Measure
I (de
operation)
FO,l
=
Source
V
Measure
I
(sweep
operation)
Fl,O
=
Source
I
Measure
V
(de
operation)
+
+
SEC110N2
Operation
Fl,l
=
Source
I
Measure
V
(sweep
operation)
For
de
operation,
the
B
command
is
used
to
program
the
source
(bias)
value,
source
range,
and
delay.
The
com-
mand
is
sent
in
the
following
form:
B (bias),(range),(delay)
Bias:
A
valid
source
value
within
the
source
range
of
the
Source
Measure
Unit.
Range:
A
value
that
corresponds
to
the
source
range
of
the
Source
Measure
Unit.
If
not
using
auto,
the
selected
range
must
be
large
enough
to
accommodate
the
bias
value.
1-source
V-source
0=
Auto Auto
1=
lnA
l.lV
(236, 237); 1.5V (238)
2=
lOnA
11
V
(236, 237); 15V (238)
3=
lOOnA
llOV
4=
lJJA
1100V(237)
5=
lOJJA
*
6=
lOOJJA
*
7=
lmA
*
8=
lOrnA
*
9=
lOOmA
*
10=
lA
(238)
*
"Dlegal V
-source
option
Delay:
De
delay
in
msec
(0
to
65000)
HP
BASIC
4.0
Programming
Example:
OUTPUT
716;
"Fl,OX"
OUTPUT716;
"B36E-9, 3,
500X"
OUTPUT
716;
"HOX"
Select
Source
I
Measure
V
for
de
operation.
Set
source
to
36nA
(exponent
form
shown),
lOOnA
range,
and
de
delay
to
0.5
seconds.
Applytriggertoupdate
display.
Complete
information
concerning
the
IEEE-488
bus
and
this
command
can
be
found
in
Section
3 IEEE-488 Refer-
ence.
2-45