Can IviCounter class measure width of negative pulse?

To configure IviCounter to measure a negative pulse you need to set the Channel properties to indicate a negative slope, as well as appropriate levels.

Then you need to configure the pulse measurement. So with IVI-COM the calls would be something like:

counter.Channels.Item("chan").Slope = IIviCounterSlopeEnum.Negative;

counter.Channels.Item("chan").Level = 0.1;

counter.ConfigurePulseWidth("chan", 1e-6, 1e-9);

Of course assuming the measurement is about 1us with 1ns resolution, with a pulse defined as being the level crossing 100mV. Several other adjustments can be made by changing the Channel configuration.

Hi Joe,

thank you very much for your answer.

Unfortunately it doesn't work for me :(. I have Agilent 53220A with IviCounter Driver v. 1.0.11.0.

I want to measure 3ms negative pulse. As suggested i've executed:

cntr.Channels.Item["Channel1"].Slope = IviCounterSlopeEnum.IviCounterSlopeNegative;

cntr.Channels.Item["Channel1"].Level = 5.0;

cntr.PulseWidth.Configure("Channel1", 3e-3, 1e-4);

double pw = cntr.Measurement.Read(1000);

but this command chain still measures the "positive" part of the signal. I've also tried to first configure the PulseWidth interface and then the channel, but doesn't change anything.

Do you have a chance to check it with 53220A?

Thank you

Mike

Yes, you are correct, I answered regarding the IVI class definition, not a specific driver. I'll forward this question to the appropriate product support team. Joe

@Joe Mueller

Hi Joe,

have you got any feedback from product suppport team concerning pulse width measurement of negative pulses?

Mike