Fluke PM6681R, PM6685R manual INPut HYSTeresis AUTO, Auto Sensitivity, Command Reference

:INPut :HYSTeresis :AUTO

￿«<Boolean>ONCE»

Auto Sensitivity

PM6685

AUTO from the front panel turns on both auto sensitivity (hysteresis) and auto waveform compensation(trigger level). From the bus there are two commands, one for auto hysteresis and one for auto trigger level. However, the function of these commands are identical. Both commands turn on/off the hysteresis and the trigger level simultaneously.

The auto sensitivity function normally sets the hysteresis to 33% of Vpp. However, two exceptions exists: Pulse Width and Duty Cycle, where the hysteresis is set to min.

If you have a stable amplitude, use the :AUTO ￿ ONCE, and the autotrigger will de- termine sensitivity once and then set fixed levels.

Parameters <Boolean> = ( 1/ON 0/OFF )

ONCE means that AUTO first switches ON to check the signal. After determining suitable sen- sitivity and trigger level setting, it programs these values as if they where manually set. It ends by switching off AUTO. Using ONCE instead of AUTO ON improves measuring speed.

Returned format: 10￿

Example:

SEND￿ :INP:HYST:AUTO ￿ OFF

This example switches off AUTO, enabling manual sensitivity and trigger level set- ting.

*RST condition ON

9-46 Command Reference