:MEASure:HORizontal:SLEWrate

Slew Rate Commands

Command Syntax

:MEASure:HORizontal:SLEWrate

Query Syntax

:MEASure:HORizontal:SLEWrate?

Description

This command moves the slew rate measurement to the top of the Results table and displays the measurement if it is not already shown on the table.

The query form of the command returns the measured value.

Slew rate is the voltage difference of the lower threshold to the upper threshold (ΔV) divided by the time difference of the upper threshold minus the time at the lower threshold (ΔT) of the edge you are measuring.

Slew Rate = ΔV/ΔT

To make this measurement, the Infiniium application requires at least four sample points on the edge of the waveform.

The Infiniium application will start the measurement at the edge nearest the timebase reference point.

Sources can be any displayed waveform, waveform memory, or function. For example, CHAN1_1, WMEMory1, or FUNCtion1.

Use :MEASure:TBASe:GENeral:METHod to change the definition of the waveform's top/base. Use :<waveform>:THReshold:GENeral:METHod to change the definition of the waveform's threshold.

Example Command Sequence

:MEASure:HORizontal:SLEWrate:SOURce CHAN1_1
:MEASure:HORizontal:SLEWrate:EDIRection RISing
:MEASure:HORizontal:SLEWrate
:MEASure:HORizontal:SLEWrate?

Measurement Ready?

To confirm that the measurement is ready to read, you can query the measurement's status:

if ('CORR' in Infiniium.query(':MEASure:HORizontal:SLEWrate:STATus?')):
	measurement = Infiniium.query(':MEASure:HORizontal:SLEWrate?')

If averaging is turned on (:ACQuire:SMODe AVERage), you can also confirm if the measurement result is ready by comparing the number of specified averages (:ACQuire:COUNt?) versus the number of measurement sweeps that have occurred (:ACQuire:COUNt?). The technique uses the :COUNt? common measurement query. For example,

if (Infiniium.query(':MEASure:HORizontal:SLEWrate:COUNt?') >= Infiniium.query(':ACQuire:COUNt?')):
	measurement = Infiniium.query(':MEASure:HORizontal:SLEWrate?')

You can also use an acquisition limit test to test that a number of waveforms or samples have completed before returning a measurement. Refer to the :LTESt:ACQuire:CTYPe command.

Querying Measurement Results and Statistics

You can query measurement results using the :MEASure:HORizontal:SLEWrate? query after making the proper instance settings.

If a measurement is installed into Results table (using the :MEASure:HORizontal:SLEWrate command) and you have made the proper instance settings, you can query statistics using common child queries.

Also, you can query measurement results and statistics directly from the Results table (without having to make the proper instance settings beforehand). See Querying Measurement Results and Statistics.