Stanford Research Systems SR865A Operation Manual page 126

108 Programming
Example
HARMDUAL 2
HARMDUAL?
BLADESLOTS(?) {SLT6 | SLT30 | i }
The
BLADESLOTS i
SR540 chopper. Before proper operation in
configured for either 6-slot (i=0) or 30-slot (i=1) operation, based on the hardware
installed on the SR540 chopper. You can read more about operation in chop mode on
page 76.
Example
BLADESLOTS SLT30
BLADESLOTS 1
BLADESLOTS?
BLADEPHASE(?) { p } { UDEG | MDEG | DEG | URAD | MRAD | RAD }
The BLADEPHASE p
operating a single chopper, this has little effect since the SR865A will follow the
chopper. If multiple SR865A/SR540 systems are being used in a single experiment,
BLADEPHASE
may be specified in degrees (default), or millidegrees, microdegrees, radians,
milliradians, or microradians.You can read more about chopper blade phase on page 77.
Example
BLADEPHASE 43.21 DEG
BLADESLOTS 4.321E1
BLADEPHASE?
SLVL(?) { v } { NV | UV | MV | V }
The SLVL v
3 digits or 1 nV, whichever is greater. The amplitude may be programmed from 1 nV to
2.0 V.
Example
SLVL 12.3 MV
SLVL 1.23E-2
SLVL 0.0123
SLVL?
SOFF(?) { v } { NV | UV | MV | V }
The SOFF v
digits or 0.1 mV, whichever is greater. The level may be programmed from −5.00 V to
+5.00 V.
SR865A DSP Lock-in Amplifier
Set the dual external harmonic detect to 2
Returns the dual external harmonic number i
command configures the lock-in for operation with an external
Configure for 30-slot chopper blade
Returns chopper blade configuration
command sets the phase of the SR540 chopper blade. When
can be used to modify the relative phase of the choppers. Blade phase
Set the blade phase to 43.21 deg
Returns chopper blade phase
command sets the sine out amplitude to v. The value of v will be rounded to
Set the sine out amplitude to 12.34 mV
Returns the sine out amplitude in Volts
command sets the sine out dc level to v. The value of v will be rounded to 3
RSRC EXT mode, the SR865A must be
Chapter 4