IVISCOPE_VAL_PROBE_SENSE_ON

Setting this attribute to IVISCOPE_VAL_PROBE_SENSE_ON configures the oscilloscope to sense the attenuation of the probe automatically. After you enable the automatic probe sense, subsequent queries of this attribute return the value IVISCOPE_VAL_PROBE_SENSE_ON. Use the IVISCOPE_ATTR_PROBE_SENSE_VALUE attribute to obtain the actual probe attenuation.

If you set the oscilloscope to sense the probe attenuation automatically, the probe attenuation value can change at any time. When the oscilloscope detects a new probe attenuation value, other settings in the oscilloscope might also change. The driver has no way of knowing when these changes occur. Therefore, when you enable the automatic probe sense capability, the driver disables caching for attributes that depend on the probe attenuation. These attributes include IVISCOPE_ATTR_VERTICAL_RANGE, IVISCOPE_ATTR_VERTICAL_OFFSET, and all the attributes that configure trigger levels. To maximize performance, you should set this attribute to a manual probe attenuation setting.

If the oscilloscope is set to sense the probe attenuation automatically, setting this attribute to a positive value disables the automatic probe sense and configures the oscilloscope to use the manual probe attenuation you specify.

Defined Value: –1