REMOTE PROGRAMMING
4-9
8 Instrumentation Amp Error. The input instrumentation amplifier failed
its test.
9 Output Error. The output impedance selector failed its test. This
error may occur if there is a part in the fixture when the test is
executed.
$CBT(?) i {,j} The $CBT command sets amplitude calbyte i to the value j. i may range from
0 to 94, and j from 0 to 255.
$CFT(?) i {,x} The $CFT command sets floating point calbyte i to the floating point value x.
$CMJ(?) {x} The $CMJ command sets the major parameter to be used in the standard
resistor calibration to x Ohms. If x differs by more than 10% from the nominal
value of the range being calibrated an error is generated.
$CMN(?) {x} The $CMN command sets the minor parameter value for standard resistor
calibration. x has units of ppm and may range between ±9999.9 ppm with 0.1
ppm resolution. The $CMN? query reads the current minor parameter.
$CNT? Reads the raw A/D converter counts when in diagnostic mode.
$CRN(?) {i} The $CRN command sets the range to be calibrated in standard resistor
calibration to range i. The $CRN? query reads the present calibration range.
$CTS? i The $CTS? query returns the raw A/D converter counts during normal
measurements. i = 0 and i = 1 return the inphase and quadrature counts for
the voltage measurement, while i = 2 and i = 3 return the inphase and
quadrature counts for the current measurement.
$DIA(?) {i} The $DIA command disables (i=0) and enables (i=1) diagnostic mode
measurements. The $DIA? query returns the diagnostic mode status.
$FRQ(?) {x} The $FRQ command sets the frequency correction factor to x ppm. x is
rounded to the nearest 0.1 ppm and must be less than ±10000 ppm. The
$FRQ? query returns the current frequency correction factor.
$GAN(?) {i} The $GAN command sets the instrumentation amplifier gain to setting i when
the instrument is in diagnostic mode. The $GAN? query returns the present
gain setting.
$INP(?) {i} The $INP command sets the input multiplexer to input i when the instrument
is in diagnostic mode. The $INP? query returns the present input setting.
$INT(?) {i} The $INT command sets the measurement time to i cycles of the drive
waveform. i may range between 1 and 10000 cycles, restricted so that the
total measurement time is less than 10 seconds. The $INT? query returns the
present measurement time.
$PHS(?) {i} The $PHS command sets the phase of the measurement relative to the drive
signal when the instrument is in diagnostic mode. The phase can be 0° (i=0),
180° (i=1), 90° (i=2), or 270° (i=3). The $PHS? query returns the present
measurement phase.
$RND(?) {i} The $RND command sets the rounding of the measurement results. If i = -1
the SR715/720 automatically rounds to the correct number of digits given the
current range, value, etc.. If i = 0, 1, 2, or 3 the measurement result will be
rounded to 5 - i digits of resolution. The $RND? query returns the current
rounding setting.
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