My way of thinking about this problem and others like it is to reduce it to
the simplest possible problem, and then look at the general case as a linear
extrapolation. In this case I look at the interaction of the direct and
single bounced ray during a site attenuation measurement on a perfect
Hi group:
I'm looking for HP printers to be part of our EMC host systems (ITE
emissions and immunity). One requirement is that the equipment have BSMI
approval, evidenced by a BSMI logo or number on the product label. Sales
people I have contacted at HP do not seem to have this information,
Ken Javor wrote:
My thinking is just the opposite. The duration of the pulse should be
long
relative to the time it takes to travel from transmit to receive antennas.
Then there is no smearing
It seems to me that you may be overlooking the effect of the reflected wave
on a received pulse's
Ken,
a very interesting system. It seems that leaving the amp outputting 1 GHz
longer than necessary won't hurt. I believe the unterminated horn will present
a reactive load and should not dissipate the chamber energy. If an
oscilloscope was connected to another 1 GHz antenna (even a dipole)
The pulse is a modulation waveform. At say 1 GHz the signal source is gated
on and off for a duration of 1 us at a 1 kHz rate. The pulse rise/fall-time
is limited by the rate of change associated with the microwave frequency. I
think understand what you are saying about the transmit antenna,
2 AA batteries are not going to cause magnetic coupling at 50 Hz. Faraday
says it ain't so.
From: drcuthb...@micron.com
Reply-To: drcuthb...@micron.com
Date: Tue, 29 Jul 2003 09:34:29 -0600
To: f...@np.edu.sg, emc-p...@majordomo.ieee.org
Subject: RE: self blinking LEDs as EMI sources WAS:
Ken,
do you mean you pulse an antenna with a square wave at some specific
repetition rate? If so, The pulse rise time and duration can be selected to
contain the frequency components you want. I think that if the pulse remains
on two long, the generator will act as a 50 ohm load and absorb
I wonder if the self blinking LEDs might have an oscillator running at roughly
50 Hz. And, the signal pick up could be magnetic field coupling to the
telephone.
Dave Cuthbert
Micron Technology
From: Wan Juang Foo [mailto:f...@np.edu.sg]
Sent: Friday, July 25, 2003 9:37 PM
To:
Look on NFPA's website. In addition to NFPA 70E, Standards for Electrical
Safety Requirements for Employee Workplaces, they have a video, Working
Safety with Electricity.
Brian Epstein
Sr Regulatory Compliance Engineer
Veeco Instruments
(805) 967-2700 ext 2315
brian.epst...@veeco.com
From:
Charles,
are you using the same probe for both measurements? I have found that probing
a Vcc plane accurately requires a probe with decent common mode rejection.
About the best is to solder a coaxial cable in place.
Dave Cuthbert
Micron Technology
From: Charles Grasso
Marko -
I don't know if you found what you wanted, but I went to the
PGE web site and searched on tolerance. I got this hit
http://www.pge.com/002_biz_svc/powerquality/pdf/voltage_tole
rance.pdf
that references ANSI C84.1 as the only standard for
utilization voltage regulation.
A quick
Does anybody have, or know the location of, a simple introductory how-to
guide for service technicians working on live (230V) equipment (e.g. test
measurement, RF sources, monitors etc.). I'm thinking of the practical
precautions and procedures.
IEC 60900, IEC 61472, IEC 61477, IEC 6 give
Paul,
Forgot to mention, one company years ago added their own
maximum width dimension of less than 30 inches so the boxes
could be put on a two wheel truck and easily wheeled
through a standard door!
- Robert -
On Tue, 29 Jul 2003 15:41:54 +0800
Paul Chan ncc...@tuvps.com.hk
I read in !emc-pstc that Paul Chan ncc...@tuvps.com.hk wrote (in
003d01c355a4$e1e22e80$3608670a@pcv0115) about 'Carton box dimension
and gross weight to EU' on Tue, 29 Jul 2003:
I have been asked for the max. dimension and weight of the carton
box [loaded with product]. Do you know any
Paul,
Sample shippers:
http://www.ups.com
At UPS website could not find any numbers, only
definitions.
http://www.fedex.com
At the FedEx website could not find any weight
restrictions, but did find Maximum length plus girth* per
piece is 300 inches . where *Girth = 2(Width + Height)
Dear all,
I have been asked for the max. dimension and weight of the carton box [loaded
with product]. Do you know any requirements/guidelines?
Thanks in advance
Paul Chan
16 matches
Mail list logo
