The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
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, firstname.lastname@example.org (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
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup