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Subject: Re: How to check for a 50 or 75 ohm connector
Summary: What do you think of these ping times eh?
Reply-To: You can't see me, and I pass right through planets...
References: <firstname.lastname@example.org> <email@example.com> <3E077496.EDFF8BE0@sympatico.ca>
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Date: Tue, 24 Dec 2002 01:43:07 GMT
NNTP-Posting-Date: Mon, 23 Dec 2002 20:43:07 EST
On Mon, 23 Dec 2002 22:44:02 +0000, Richard Kaulfuss
>On Mon, 23 Dec 2002 15:39:50 -0500, Dave Holford
>>As to the continuing saga of the BNC. If the 50 and 75 Ohm connectors
>>were indeed incompatible I wonder why I have never encountered test
>>equipment with 50 or 75 Ohm restrictions? The organization for which I
>>worked for almost 30 years used vast quantities of test equipment in the
>>servicing and maintenance of 50 Ohm communications and 75 Ohm video
>>systems and I never recall ever seeing any piece of test equipment
>>restricted to communications or video systems - even in our research
>>labs. Just did a quick search of a couple of oscilloscope manuals and
>>can find NO warning about using the 'wrong' type of BNC plugs.
> I know of at least one major test equipment manufacturer who
> routinely uses 50 ohm connectors on their 75 ohm inputs/outputs.
> The dielectric gives the centre pin added mechanical protection
> and the mismatch is insignificant below 100MHz.
Thank you, very much. Higher cycle rates even.
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