of attenuation and insure sufficient current cleaning of
my contacts.
Thanks for the insight.
Best regards,
Don
From: robert Macy [mailto:m...@california.com]
Sent: Monday, April 21, 2003 2:46 PM
To: djumbdenst...@tycoint.com; emc-p...@majordomo.ieee.org
Subject: Re: Low signal switching
I read in !emc-pstc that djumbdenst...@tycoint.com wrote (in <846BF526A2
05F84BA2B6045BBF7E9A6A0532B3DB@flbocexu05>) about 'Low signal switching'
on Tue, 22 Apr 2003:
>It had not occurred to me that electronic switches might do the job. I
>don't know if isolation will be an issue, but contact res
cycles to clean the gold
contacts.
Dave Cuthbert
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Monday, April 21, 2003 5:20 PM
To: drcuthbert; 'djumbdenst...@tycoint.com'; emc-p...@majordomo.ieee.org
Subject: Re: Low signal switching
I can certainly suggest a solutio
en.ja...@emccompliance.com]
Sent: Monday, April 21, 2003 7:20 PM
To: drcuthbert; 'djumbdenst...@tycoint.com'; emc-p...@majordomo.ieee.org
Subject: Re: Low signal switching
I can certainly suggest a solution, although it would take a bit of research
to totally determine the answer. There
>-Original Message-
>From: djumbdenst...@tycoint.com [mailto:djumbdenst...@tycoint.com]
>Sent: Monday, April 21, 2003 10:28 AM
>To: emc-p...@majordomo.ieee.org
>Subject: Low signal switching
>
>
>
>Hello Friends,
>
>I have an application in which I would like to switch system
>signals on
Don,
It is my understanding that physical switch contacts are
"cleaned" with current - and use.
It is probably ok at the lower signal levels since from
time to time you're running the higher levels through the
switches.
Is there someway you can switch and then verify contact?
I had occasion once to look at the input relay on an NM-37. The set acted
as if relay contacts were corroded -- but the sealed reed relay was fine;
the problem was a cold-solder joint.
Relays sealed in inert gas or vacuum should never fail due to corrosion,
and there's no need to limit their smal
Mini-Circuits:
http://www.minicircuits.com/
and the only amplitude related specs there were insertion loss and vswr.
> From: drcuthbert
> Reply-To: drcuthbert
> Date: Mon, 21 Apr 2003 14:58:57 -0600
> To: "'djumbdenst...@tycoint.com'" ,
> emc-p...@majordomo
Don,
I have encountered this problem with low-level signals. It seems to vary
greatly from manufacturer to manufacturer (the company we had the best results
with went out of business). When the contact(s) became dirty I would run a DC
current and clean it. The problem would quickly return and the
There was a thread on this some time ago and I think the consensus was that
the -20 dBm limit must be a typo, or a misunderstanding by the sales dept
that writes the catalog copy. if the switch is purely mechanical, the
signal level shouldn't matter, except for here are some wool-gathering
though
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