CS328 Classic with CS700A

Hello,

Is it possible to get a clean view of 10 MHz square wave using CS328 Classic?

I set Sig Gen to 10MHz square wave signal and connect the rf output to probe using its bnc adapter. I set probe to 10x, probe has been compensated.

Waveform looks more like sine wave than square wave, not clean square wave. Is this because of sampling or bandwidth limit?

As far as I know, scope input bandwidth is 100MHz, probe bandwidth at 10x is 250MHz, scope sampling is 100MSa/sec. I don't know, if it is normal to not get a clean square wave signal with only 10 samples per period, or how the bandwidth affect this.

Hello, Is it possible to get a clean view of 10 MHz square wave using CS328 Classic? I set Sig Gen to 10MHz square wave signal and connect the rf output to probe using its bnc adapter. I set probe to 10x, probe has been compensated. Waveform looks more like sine wave than square wave, not clean square wave. Is this because of sampling or bandwidth limit? As far as I know, scope input bandwidth is 100MHz, probe bandwidth at 10x is 250MHz, scope sampling is 100MSa/sec. I don't know, if it is normal to not get a clean square wave signal with only 10 samples per period, or how the bandwidth affect this.

Hello,
Yes it is possible to gt a clear view of a 10 MHz square wave on a 2005 CS328 classic. You are correct, there will be only 10 samples per cycle, but you can use repetive sampling to get better time resolution. Even so any harmonics above the 7th - 70 MHz will become attenuated, and so the waveform will not be a perfect square wave.

However the sig gen only has a bandwidth of around 5 MHz, and so it cannot render a square wave with the 100 MHz BW that is actually needed. Perhaps you could use an external square wave generator. Ideally it should be a few Hz different from 10 Mhz to get the best repetive response.

The classic sig gen was our first go, and we do much better now.

Thanks for your interest.

Hello, Yes it is possible to gt a clear view of a 10 MHz square wave on a 2005 CS328 classic. You are correct, there will be only 10 samples per cycle, but you can use repetive sampling to get better time resolution. Even so any harmonics above the 7th - 70 MHz will become attenuated, and so the waveform will not be a perfect square wave. However the sig gen only has a bandwidth of around 5 MHz, and so it cannot render a square wave with the 100 MHz BW that is actually needed. Perhaps you could use an external square wave generator. Ideally it should be a few Hz different from 10 Mhz to get the best repetive response. The classic sig gen was our first go, and we do much better now. Thanks for your interest.