[time-nuts] Rigol scopes

[shalimr9 at gmail.com]

That's why the default mode for a DSO should always be "pulse detect" or whatever the manufacturer calls it, unless you know what you are doing. As far as I know, all DSOs have this or an equivalent mode where the ADC runs at full speed regardless of sweep speed, and the min and max readings between two display points are stored. If you are in a condition that would otherwise result in aliasing, the trace will look like a big fat trace, just like on an analog scope if you are probing a 10MHz signal at 1mS/div.

You get the same issue with an analog sampling scope, except that those don't have a "pulse detect" mode, so they WILL lie to you unless you know what you are doing. It is not a "digital storage" issue, it is a sampling issue.

To summarize, the instrument you have is ALWAYS more useful than the one you don't have, no exceptions.

Didier KO4BB

Sent from my BlackBerry Wireless thingy while I do other things...

-----Original Message-----
From: "J. Forster" <jfor at quikus.com>
Sender: time-nuts-bounces at febo.com
Date: Mon, 16 Apr 2012 15:39:56 
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: jfor at quikus.com, Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] Rigol scopes

Well, if you doubt aliasing issues, see the attached, downloaded from my
Tek TDS1002.

This is a simulator for LORAN-A

-John

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