Agilent Technologies 4263B - Reading out Measured Result Using:FETC Command

4263B
Reading
out
measured
result
using
:FETC?
command
Y
ou
can
use
this
readout
method
when
you
want
to trigger
the instrument
from any
source
other
than
an
external
controller
or
when you
want to
perform a
process that
is between
triggering
the
instrument
and
reading
out
the measured
result.
The
readout
procedure
using
the
:FETC?
command is
described below
.
1.
Set
up
the
trigger
mode
as
necessary
.
2.
Trigger
the
instrument
by
using
the method
for the
trigger mode
.
Note
To
trigger
the
instrument
from
an
external
controller
in
this
procedure
,
use
the
:TRIG command.
3.
Execute
the
:FETC?
command
at
the
completion
of
the
measurement.
4.
Read
out
the
measured
result.
T
o
repeat
the
measurement,
repeat
Steps
2to
4.
Figure
4-6
and
Figure
4-7
show
sample
programs
using
the
:FETC?
command.
Figure
4-6
is
for
the
ASCII
transfer
format
and
Figure
4-7 is
for the
binary transfer
format.
These
programs
,
when
an
external
trigger
is inputted
and the
measurement nishes
, read
out
the
measurement
status
,
measured
primary
parameter result,
measured secondary
parameter
result,
and
comparator
sorting
result
(when
the
comparator
function is
ON) and
display
them.
The
program
of
Figure 4-6
is
detailed
below
.
Line
60
Sets
the
GPIB address
.
Line
70
Sets
the
data transfer
format
to
the
ASCII
format.
Lines
90
to
100
Turns
ON the
trigger
system
continuous
startup
and
sets
the
trigger
mode
to
the
external
trigger
.
Lines
120
to
130
Reads
out
the
ON/OFF
state
of
the
comparator
function
and
assigns
it
into
the
Comp
ag
variable
.
Lines
170 to
210
Makes
the
setup
generate
an
SRQ
when
measurement
nishes
and
clears
the
status byte
register
and
operation
status
event
register
.
Lines
250
to
260
Sets
the
branch
destination
of
the
SRQ
interrupt
and
enables
the SRQ
interrupt.
Lines
270
to
280
Displays
the
message
to
prompt
the
user
to
input
an
external trigger
and
then
waits
until
the
external
trigger
is
inputted
and
the
measurement
nishes
.
Line
300
Executes
the
measured result
readout
command
(
:FETC?
).
Line 320
If the Comp
ag value is 1 (the comparator function
is ON), reads out
the measurement status
, measured primary parameter result,
measured
secondary parameter result, and comparator sorting result.
Line 340
If the Comp
ag value is not 1 (the comparator function is
OFF), reads
out the measurement status
, measured primary parameter result, and
measured secondary parameter result.
Lines 390 to 410
Displays the measurement status
, measured primary parameter result,
and measured secondary parameter result.
Line 430 to 440 If the Comp ag value is 1 (the comparator function is ON), displays the
comparator sorting result.
Line 460 If the Comp ag value is not 1 (the comparator function is OFF), displays
\Comparator : OFF."
Remote Operation (To Control from a Computer) 4-21