http://www.ieee-pses.org/symposium
http://www.emc2004.org/
From: George Bittar [mailto:[email protected]]
Sent: Monday, August 09, 2004 9:43 AM
To: [email protected]
Subject: Selective Frequency Power Meter
Dear Group,
I am looking for a selective frequency power meter to use in
immunity tests.
It would be a plus if it has some serial, gpib or usb output to
connect on PCs and download data etc.
Does anyone know such equipment?
I've been looking on the internet, but didn't find much...
The frequency range should include 1KHz and go up to some MHz.
regards,
--
George Bittar
EMC Test Engineer - VTS
George:
Is there some reason you can't or don't want to use a spectrum analyzer?
That frequency range is within the capabilities of old HP-856x series
analyzers, and they have full remote I/O via an IEE-488 bus.
Or, you could use something like the old HP-3580 analyzer, which covers
something like 20 Hz through 300 kHz, and then switch over to another
analyzer to cover your higher range.
You could also try using a good oscilloscope with a FFT capability for the
low frequencies, and again switch to a SA for the higher frequencies.
I see EMC-10's, EMC-25', NM-17/27's and NM37/57's on eBay all the time. All
of these will support remote control and data I/O, although not in the
convenient IEEE-488 style. You may have to implement your own computer
interface, dealing with discrete logic lines, BCD clusters and analog DC
ramps. (I have seen only one auction for a CCI-7, the computer interface for
Eaton series 7 receivers and IEEE-488, and that didn't include the huge
multi-line receiver cables.)
Finally, in measuring immunity, you should need much selectivity in your
meter; we would hope that spurious and harmonic content of your test signal
would be -35 dBc or better. I would think you could use suitable directional
couplers and a broadband power meter.
You ARE trying to monitor forward power? If you are trying to monitor
generated field strengths using a monitor antenna, or if you are trying to
pre-calibrate your chamber for field uniformity, then there's other systems
you should consider first.
Maybe we can give you better advice if you better define your goals,
resources and constraints.
Regards,
Ed
Ed Price
[email protected] WB6WSN
NARTE Certified EMC Engineer & Technician
Electromagnetic Compatibility Lab
Cubic Defense Applications
San Diego, CA USA
858-505-2780 (Voice)
858-505-1583 (Fax)
Military & Avionics EMC Is Our Specialty
This message is from the IEEE Product Safety Engineering Society
emc-pstc discussion list.
IEEE PSES Main Website: http://www.ieee-pses.org/
To post a message send your e-mail to [email protected]
Instructions for use of the list server:
http://listserv.ieee.org/listserv/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Ron Pickard: [email protected]
Dave Heald: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
Jim Bacher: [email protected]
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
