positive pulse width custom ref level scpi

please see attached pic (chan1) for a series of (filtered) clk signals.&#160;<br> I want to be able to use scpi to tell the scope to give me the positive pulse width stats of:<br> 1. using custom reference levels of 90% to 90% (marked H in the pic) and&#160;<br> 2. using custom reference levels of 10% to 10% (marked L in the pic)&#160;<br> <br> what i'm trying to do is to see if the clk is being tri-stated in the samples by comparing the max of&#160;10% to 10% and&#160;90% to 90%.&#160;<br> you can see from the pic the the one being tri-stated will have bigger&#160;positive pulse width only from 10% to 10% not 90% to 90%

Hi Xiang,<br> <br> I don't think yuou want to use the pulse width measurement for that and I don't think that's how the reference levels work.<br> Instead I'd suggest you use the High Time and Low Time measurements.<br> <br> In terms of the SCPI commands to control these and other measurements, they should all be documented in the measurement chapter of the programmer's manual.