From: Ian Walker
Subject: Re: How to check for a 50 or 75 ohm connector
Date: Mon, 23 Dec 2002 06:34:26 +0000
NNTP-Posting-Date: Mon, 23 Dec 2002 07:00:53 +0000 (UTC)
User-Agent: Turnpike/6.02-U ()
In article , DarkMatter
>On Mon, 23 Dec 2002 01:05:15 +0000, Richard Kaulfuss
> Gave us:
>> I'm beginning to suspect you don't actually understand the concepts
>> of transmission lines and characteristic impedance.
> Glad I measure up to your E-1 grade assessment. I'm also glad I
>don't have to.
>>>>If I connect
>>>>two 50 ohm BNC cables via a 75 ohm coupler it will exhibit a worse
>>>>return loss than if I use a 50 ohm coupler. If I really feel bored and
>>>>have nothing useful to do tomorrow then I might perform this experiment
>>>>with an SNA, I won't confuse you with a VNA and a sliding termination.
>>> Hahahah... whatever.
>> Hmm...thought as much.
> Having interpretive problems, dipshit? The discussion is about BNC
>connector physical nomenclature, NOT SNA, or VNA, or any other
Do you know what VNA and SNA are? They are instruments (scalar network
analyser and vector network analyser) with which you measure some of the
physical properties of electronic circuits, i.e. the effects of LCR in
the transmission line presented by a BNC connector. Presumably you don't
know as you are so dismissive of their use in showing the very real
impedance difference between 50 and 75 ohm BNC connectors!