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From: Paul Burridge
Subject: Re: RF power measurement (again)
X-Newsreader: Forte Agent 1.8/32.548
Date: Tue, 19 Nov 2002 09:15:07 +0000
NNTP-Posting-Date: Tue, 19 Nov 2002 10:43:53 GMT
Organization: Virgin Net Usenet Service
On 18 Nov 2002 16:44:29 -0800, email@example.com (Tom Bruhns) opined
>o Do you know that the scope is good for the frequency you're
The signal under test is 40Mhz., the scope is rated at 20., so I
accept the test set up isn't perfect. However, I was under the
impression that the general level of signal envelope would still be
pretty accurately displayed at double the frequency?
>o Does the resistor get warm?
Not very. Most of the heat as such appears to come from the tuning
>Can you compare with
> a similar resistor excited with DC?
Can you "excite" anything with DC? :-)
>o Do you know that the transmitter is designed to output
> power to a 50 ohm load?
No it's just my best guess.
>o Are you sure the resistor looks reasonably like 50
> ohms at your operating frequency?
I assume so. It's not wire-wound.
"I was going to help him up, but then I thumped him."
Michael Head's plea in mitigation to Weybridge Magistrates, Sept. 1975
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