[SI-LIST] Oscilloscope bandwidth and Non_Monotonic
- From: bala <balaseven@xxxxxxxxx>
- To: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Thu, 20 Nov 2014 21:01:13 +0530
Hi All,
I am measuring 125MHZ,1.2ns rise time clock with Tek's scope.
When i measure clock with 5G Bandwidth i see non monotonic edges,when i
measure the same clock with 500MHZ and 1GHZ,clock was clean.
Here is the formula i use whenever assess clock signals,
Fknee=0.5/rise=0.5/1.2ns=416MHZ
Required bandwidth for maximum accuracy=1.9*419=800MHZ.
Since required bandwidth is 800MHZ ,can i consider waveform with 1G as
precise waveform.?
Why non-monotonic appears at high BW?
--
bala
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