Measuring DC voltage in RF field
Electronics Forum Index Electronics
Circuits, theory, electrons and discussions.
 
 FAQFAQ   MemberlistMemberlist     RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 
Google
 
Web ElectronicsHelp.net
Measuring DC voltage in RF field

 
Post new topic   Reply to topic    Electronics Forum Index -> Design
Author Message
Dieter Brozio
Guest
Posted: Sat Feb 05, 2005 1:57 am    Post subject: Measuring DC voltage in RF field Reply with quote
Hi,

I am looking for a small DC probe which is able to measure
analouge voltages from 1...25V inside a RF field of more than 300 V/m.

I tried it with probes of Langer-EMV and Teseo. Probes of Teseo
are too big (no homogenous field) and those of Langer are only able up
to 200 V/m.

Since I have destroyed the second set of 500 EUR I should better
ask for alternatives. :-)

Any ideas? Any experiences with other probes? Thank you in advance.

Dieter

Back to top
Mark
Guest
Posted: Sat Feb 05, 2005 12:06 pm    Post subject: Re: Measuring DC voltage in RF field Reply with quote
Can you explain the problem better.

A DC meter with low pass filter will ignore the RF.

You could make the probe with series resistnace and the meter a hi z DC
input. The resistors will attenuate the RF.

Mark
Back to top
Robert Baer
Guest
Posted: Sat Feb 05, 2005 7:34 pm    Post subject: Re: Measuring DC voltage in RF field Reply with quote
Mark wrote:
Quote:

Can you explain the problem better.

A DC meter with low pass filter will ignore the RF.

You could make the probe with series resistnace and the meter a hi z DC
input. The resistors will attenuate the RF.

Mark

Err...even an analog DC meter can have measurement problems in high RF
fields.
However, they are better than even tube-based meters, which are far
better than any solid state crap^H^H^H^H metering systems.
DC measurements are the least problematic, then resistance
measurements, and then AC measurements are the nasty hard class.
There was a true story of a drunk in a city that heard music and
talking; turned out that the fire escape he was sleeping by was
vibrating - it acted like a complete radio receiver for the high powered
AM transmitter that was only a few miles away.

Back to top
 
Post new topic   Reply to topic    Electronics Forum Index -> Design All times are GMT
Page 1 of 1

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Home & Living New Topics
Contact Us
Powered by phpBB