What happened to "Duty Cycle Low" measurment

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What happened to "Duty Cycle Low" measurment

Postby ScannerDanner » Fri Mar 09, 2012 10:13 pm

I was showing my students how to monitor a solenoid type IAC in class. When I added some measurements I couldn't change my duty cycle to measure the low portion of the waveform. As this was a ground side switched circuit. It was important to be able to do this as the "on-time" is the low portion of the waveform. I used to be able to select Duty Cycle Low or Duty Cycle High. What am I missing?
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Re: What happened to "Duty Cycle Low" measurment

Postby Alan » Tue Mar 13, 2012 9:46 am

Yes, that measurement does seem to have gone AWOL so we will start a search to find out where its gone.

A bit of a messy work around would be to create a maths channel to invert your signal then measure the duty cycle of the inverted signal. You can hide the maths channel from display. Not ideal but should work for now.
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Re: What happened to "Duty Cycle Low" measurment

Postby ScannerDanner » Tue Mar 13, 2012 11:51 am

Thank you Alan, I will try that
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Re: What happened to "Duty Cycle Low" measurment

Postby Dave Hill » Sat Mar 17, 2012 4:04 pm

ScannerDanner wrote:I was showing my students how to monitor a solenoid type IAC in class. When I added some measurements I couldn't change my duty cycle to measure the low portion of the waveform. As this was a ground side switched circuit. It was important to be able to do this as the "on-time" is the low portion of the waveform. I used to be able to select Duty Cycle Low or Duty Cycle High. What am I missing?


Hi Paul (is it Paul?)

I watched your video the other day (on this thread.. topic9212.html ) & I thought it demonstrated Pico very nicely. I thought the projected image & the way you controlled the scope by with a "touch screen" kind of method was very cool. I want one! :wink: If you don't mind me asking... What system is it that you were using to do the demo?

I noticed that you drew attention to the duty cycle measurement & the fact that it only measures the "duty high". To be honest I don't think I have seen the "duty low" option in any Pico 6 software build. I know the old Pico 5 software used to have this option though.

Strange how they didn't think it important to put it back.

Maybe they will now?
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Re: What happened to "Duty Cycle Low" measurment

Postby ScannerDanner » Sat Mar 17, 2012 4:52 pm

Hey Dave
Yes my name is Paul and I was using something called a Smartboard. It is cool isn't it? I am blessed to have one for sure. It has been a wonderful addition to my class. Thanks for your comment on the video!
I talked to some of the pico guys and they are looking into the duty cycle low measurement for us.
Thanks
Paul
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