Stanford Research Systems SR620, Руководство пользователя

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Programming Commands 35
SR620 Universal Time Interval Counter
SCEN (?) j
The SCEN command controls the enable status of
the SR620's scanning features. If j = 0 scanning is
disabled. If j = 1 the scan mode is set to SINGLE.
In this mode the unit will automatically stop taking
data when a scan is complete. If j = 2 the scan
mode is set to REPEAT and the unit will
automatically restart the scan when the present
scan is complete.
SCLR
The SCLR command clears but does not start a
scan.
SLOC?
The SLOC? query returns the number of the last
completed scan point. If no points have been
taken or scans are not enabled SLOC? return the
value 0.
SCPT (?) j
The SCPT command sets the number of points in
a scan. The number may be set to one of 2, 5, 10,
25, 50, 125, or 250 points.
VBEG (?) j{,x}
The VBEG command sets the DAC output scan
start voltage. The parameter j refers to the
channel desired ( 0 or 1) and x is a voltage in the
range -10.00 to +10.00 volts. If the selected
channel is not enabled to be a general purpose
output this command has no effect. If scans are
disabled or the selected channel's voltage step
size is set to 0 the output voltage is immediately
set to x volts. Otherwise, the voltage is set to x at
the beginning of the next scan.
VOUT? j
The VOUT? query reads the present output
voltage of the select d/a channel. This command
can be used to monitor the stepping of the d/a
outputs during a scan.
VSTP (?) j{,x}
The VSTP command sets the d/a output scan step
size. The parameter j refers to the channel
desired ( 0 or 1) and x is a voltage in the range -
10.00 to +10.00 volts. If the selected channel is
not enabled to be a general purpose output this
command has no effect. The new step size
becomes effective at the start of the next scan.
Graphics Control Commands
AUTP (?) j
The AUTP command sets the autoprint mode.
The parameter j = 1 turns autoprint ON while j = 0
turns autoprint OFF. This command returns an
error if the output device is set to plotter since
autoprinting is not allowed with the plotter ( no
time to change the paper).
AUTS
The AUTS command autoscales the current
graph. It is the same as pushing the front panel
autoscale button. Note that autoscaling of the
histogram is not completed until the NEXT
measurement is completed.
CURS (?) j
The CURS command sets the cursor position to j
( 1-250 ). If the graph is empty or the stripchart
has not yet reached point j an error is returned.
DGPH (?) j
The DGPH command sets the displayed graph. If
j = 0 the histogram is displayed, if j = 1 the mean
stripchart is displayed, and if j = 2 the jitter
stripchart is displayed.
GCLR
The GCLR command clears the graphs. If a scan
is in progress GCLR does NOT clear the scan.
The SCLR command clears both the scan and the
graphs.
GENA (?) j
The GENA command sets the graph enable
status. If j = 0 the graphs are turned OFF. If j = 1
the graphs are turned ON. Turning the graphs off
can dramatically improve the SR620's
measurement throughput (see details in the
Programming Examples section).
GSCL (?) j{,x}
The GSCL command sets the scales for the
graphs. The parameter j selects the scale to be
set according to the following table: