I will try to avoid too much repetition of what has already been
posted. Some other ways I have handled ground loops:
1. Capacitive or inductive coupling - this may include AC coupling in
*both* the center conductor and shield of a coaxial cable.
2. High isolation power supplies - these may use
the instructions there.
--
Message: 5
Date: Mon, 20 May 2013 16:15:00 +0200
From: Volker Esperail...@t-online.de
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Ground loops in measurements?
Message-ID:519a2fe4.8090...@t
Moin,
A couple of weeks ago, there was a short discussion on bad connectors
and cables and the coupled in noise of those. Summarized it said that
measurements in the time-nuts scale are very sensitive to even the lowest
noise levels and coupled in signals.
But, all the measurements we do are
Moin Attila,
yes ground loops can cause serious measurement problems. And solving
those could fill a hole book. Here's what I do in practical:
1.) avoid the loop
2.) if you can't, try harder to avoid it
- depending on the problem: break up the dc loop by using capacitors
(most often you only
2013 16:15:00 +0200
From: Volker Esper ail...@t-online.de
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Ground loops in measurements?
Message-ID: 519a2fe4.8090...@t-online.de
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
14:08:03 +0200
From: att...@kinali.ch
To: time-nuts@febo.com
Subject: [time-nuts] Ground loops in measurements?
Moin,
A couple of weeks ago, there was a short discussion on bad connectors
and cables and the coupled in noise of those. Summarized it said that
measurements in the time-nuts
: [time-nuts] Ground loops in measurements?
Moin,
A couple of weeks ago, there was a short discussion on bad connectors
and cables and the coupled in noise of those. Summarized it said that
measurements in the time-nuts scale are very sensitive to even the lowest
noise levels and coupled in signals
Camp li...@rtty.us
To: 'Discussion of precise time and frequency measurement'
time-nuts@febo.com
Sent: Monday, May 20, 2013 6:00 PM
Subject: Re: [time-nuts] Ground loops in measurements?
Hi
Coax is interesting stuff. The shielding is only good down to some lower
frequency limit. For anything
A couple of good references regarding noise minimization in electronic
systems are:
Grounding and Shielding: Circuits and Interference by Ralph Morrison
Noise Reduction Techniques in Electronic Systems by Henry W. Ott
And the old fallback has been MIL-HDB-419 volumes I and II which
mostly
, 2013 2:50 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Ground loops in measurements?
Hi Bob whats the problem at low freqs ?? I thought leakage was a function of
the size of the holesv the wavelengthor are we into braid skin effect
below 100kHz?? so
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