[time-nuts] FE-5680A Results so far

shalimr9 at gmail.com shalimr9 at gmail.com
Fri Dec 30 09:56:42 EST 2011


My TDS210 has an extremely stable display, even at the max sweep speed.

Of course, the vertical amplifier has the noise you would expect from a broad band amplifier, and if the signal is too low, that noise will contribute to some jitter, but 200mV at 10MHz will show a very stable display on my scope.

Try to get another method for confirmation, like a ham or broadcast receiver that can tune 10 or 20 MHz

Didier KO4BB

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

-----Original Message-----
From: Azelio Boriani <azelio.boriani at screen.it>
Sender: time-nuts-bounces at febo.com
Date: Thu, 29 Dec 2011 09:33:14 
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] FE-5680A Results so far

Artifacts from the TDS210, not from the Rb.

On Thu, Dec 29, 2011 at 8:14 AM, mike cook <michael.cook at sfr.fr> wrote:

> Hi,
> Just got my cheapo 5680A.  It was accompanied by a little teddy bear
> clutching a L7805CV !
>
> Got a couple of questions.
>
> 1) What is the expected 10MHz peak to peak voltage.  FEI doc seems to
> indicate 0,5V but I am getting only 200mv.
> 2) What is the sensitivity to 15V input level. I am only measuring 14,722
> (stable) on Pin1.
> 3) Could this low input voltage affect output voltage?
>
> The box locks after a couple of minutes but my TDS 210 is showing a very
> jittery  ( 9,98-10,02 MHz ) but well formed sine wave for 8 hours of being
> powered on.  Could this also be an artefact of low main power?
>
> regards,
> Mike
>
>
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