Keithley 2182, User Manual, Page: 255 / 339

Additional SCPI Commands 15-17
:AZERo[:STATe] <b>
:SYSTem:AZERo[:STATe] <b> Control Autozero
Parameters
<b>= 0 or OFF Disable Autozero
1 or ON Enable Autozero
Description
With autozero disabled, measurement speed is increased. However, the zero and gain
reference points will eventually drift resulting in inaccurate readings of the input signal. It is
recommended that autozero only be disabled for short periods of time.
NOTE See “ Performance considerations ” in Section 2 for more information on autozero.
:LSYNc <b>
:SYSTem:LSYNc <b> Control line cycle synchronization
Parameters
<b>= 0 or OFF Disable line cycle synchronization
1 or ON Enable line cycle synchronization
Description
When enabled, A/D conversions are synchronized with the power line frequency. This
reduces noise at the expense of speed. Line cycle synchronization (LSYNC) is not available for
integration rates <1 PLC, regardless of the LSYNC setting.
NOTE See “ Performance considerations ” in Section 2 for more information on LSYNC.
:LFRequency?
:SYSTem:LFRequency? Read power line frequency setting
Description
On power-up, the Model 2182 detects the line power frequency and automatically selects the
proper line frequency setting. The line frequency setting can be checked using this command.
The response message will be 50 or 60. The value 50 indicates that the line frequency is set
for 50Hz (or 400Hz), while 60 indicates that it is set for 60Hz.