[SI-LIST] Re: Oscilloscope bandwidth and Non_Monotonic
- From: "Tom Dagostino" <tom@xxxxxxxxxxxxxxxxx>
- To: <balaseven@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 20 Nov 2014 09:28:32 -0800
Oh, and I forgot to mention, the effect you are seeing may be caused by your
probing setup.
Tom Dagostino
Teraspeed Labs
9999 SW Wilshire Street
Suite 102
Portland, OR 97225
tom@xxxxxxxxxxxxxxxxx
www.teraspeedlabs.com
971-279-5325 office
503-430-1065 cell
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of bala
Sent: Thursday, November 20, 2014 7:31 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Oscilloscope bandwidth and Non_Monotonic
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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