Mike Howard and his folks have been calibrating antennas and probes for me
for a _really_ long time (mid-90s), across multiple companies. I've always
found them to be consistent, competitively (or better) priced and offering
quick turn-around.
In the usual disclaimer: I have absolutely
Note that 1.5² is just over a tenth wavelength at 1 GHz. 12.7%, to be
exact, and of course Ed was going from memory here. We expect no resonances
with this dipole loaded at a high, capacitive impedance, or if we measure
its current output into a low impedance (allowing the short dipole to look
Patrick:
The probe manufacturer says something like “keep the probe box away or out of
the field” or “best results are obtained with the probe placed on a slant.” But
then they show us isotropicity data that promises +/- ¼ dB. It seems like those
are contradictory statements.
Back around 2002,
Hi,
We’re looking for a battery safety expert to join us on a project. They need
to be very current on high performance lithium-ion packs as the current best
practices lead the standards a bit.
Please contact me directly.
Best Regards,
John
John Allen
Product Safety Consulting, Inc
A solution in search of a statistically relevant problem? There are also some
NHTSA guidelines for local governments that offer reasonable technical
solutions for urban roadways. Perhaps the more workable and useful solution
would be an expansion of the current automotive pedestrian collision
A few years ago on this forum we discussed something about the quiet nature
of electric and hybrid vehicles and how this can be a hazard for
pedestrians. It seems there is an action in the Federal Register to
address this problem.
Notification Number: USA/777/Rev.1 (United States of America)
Thank you John and Boštjan for your replies. I'm glad internal power supplies
fall under the 4.1.1 clause, because beyond that there are no class 3 energy
sources and very few class 2 in the products I'm transitioning.
I'll think about how to handle the labelling.
Jim Hulbert
-
John,
Techmaster Electronics in San Diego can do this. The antenna range may be in
the Bay Area, instead of San Diego.
Jim
James L. Knighten, Ph.D.
Teradata
17095 Via Del Campo
San Diego, CA 92127
858-485-2537
From: John Mcauley [mailto:john.mcau...@cei.ie]
Sent:
It's the other way around.
They used to be Liberty labs and now they are Keysight.
James L. Knighten, Ph.D.
Teradata
17095 Via Del Campo
San Diego, CA 92127
858-485-2537
From: Wiseman, Joshua [mailto:joshua.wise...@orthoclinicaldiagnostics.com]
Sent: Tuesday, March 06, 2018
John,
We're using Liberty Labs (formerly Keysight). In Kimbalton, IA. Cindy
Schechinger or Ashley Gormley (712) 773-2199
Josh
From: John Mcauley [mailto:john.mcau...@cei.ie]
Sent: Tuesday, March 06, 2018 10:52 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] ISO17025 Antenna Calibration
Liberty Labs comes to mind.
Ghery S. Pettit, NCE
Sent from XFINITY Connect Application
-Original Message-
From: john.mcau...@cei.ie
To: EMC-PSTC@LISTSERV.IEEE.ORG
Sent: 2018-03-06 8:01:55 AM
Subject: [PSES] ISO17025 Antenna Calibration
Hi
Can anyone suggest a US based antenna
It's important to bear in mind that the manufacturer can do *anything*
that is not specifically prohibited using the magic words 'shall not',
and can be justified and is documented. Alongside this is the mantra 'If
in doubt, write it down.' In time of trouble you can rarely have too
much
Hi
Can anyone suggest a US based antenna calibration facility that provides ISO
17025 accredited calibration to ANSI 63.5. A Google search doesn't point to
obvious suppliers.
They must be accredited to ISO 17025.
Thanks in advance
John McAuley
-
Hi Jim,
1) Yes, this rule/exception is also applicable for internal power
supplies. The duration of transition period depends on voting result of
circulated document (amendment to EN 62368-1:2014).
2) EN 60950-1 also has a requirements that symbols need to comply with IEC
60417
All -
I am planning to transition a few "legacy" products from EN 60950-1 to EN
62368-1 for CE marking purposes.I have 2 questions:
1. Clause 4.1.1 of EN 62368-1 contains the statement: "Components and
subassemblies that comply with IEC 60950-1 or IEC 60065 are acceptable as part
of
Ken:
Yes, you are right, the probe doesn't know the frequency. Thus, the
manufacturer has to make it flat, by design and construction, or you have to
generate your own correction factors based on performance testing of the probe.
Ed Price
WB6WSN
Chula Vista, CA USA
From: Ken Javor
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