In message 8cb5118576ffd9e-f44-...@webmail-mg06.sim.aol.com, dated
Fri, 30 Jan 2009, peterh...@aol.com writes:
One of our customers has asked if our products complies with NSA
(National Security Agency) and JTIC ( Joint Tactical Intelligence
Center). Can anyone shed some light as where I
There is no such (single) generic DoD or NSA compliance standard
or policy. There are two types of compliance - FARs and
whatever is in the project spec.
The NSA requires that all vendors be registered.
JTIC does not publish standards - it is a 'test house'.
The DoD, the NSA, and JTIC have
In message
c8e28fdb460d664aa3ad73d1d53aef19535...@post.hursley-emc.co.uk, dated
Thu, 28 Sep 2006, Julian Jones ju...@hursley-emc.co.uk writes
have had some discussion on NSA with auditors. I'd be interested in
everyone's view
The NSA shows
Horizontal @ 10m to be done at 1m height
Vertical
Julian,
ANSI C63.4 Section 5.4 defines the parameters for NSA measurements, including
1m and 1.5m (transmit antenna) for vertical polarization using broadband
antennas. The receive antenna shall be varied in height from 1 to 4 meters.
Bill
Bill Stumpf
D.L.S. Electronics
166 South Carter
Tried once with bilogs and had problems.
We ended up to use bicons at 30-200 MHz and bilogs above that.
However, we did not investigate the subject further so I cannot say that it
would never work...
Ari
From: owner-emc-p...@listserv.ieee.org
mailto:owner-emc-p...@listserv.ieee.org]On Behalf
John Harrington wrote:
I'm having some fun with an NSA measurement. I get a swing of 8dB
between
30MHz and 45MHz horizontally polarized. At 30 MHz I get too little
attenuation (i.e. I receive too much of the transmitted signal) and at
45MHz
too much attenuation. The rest of the frequency
Ferrites on both tx and rx cables. Also, don't forget the pads at the
antennas as they reduce sw. I had to use both the ferrites and 6 dB pads to
eliminate swings, which were obviously not due to site geometry but cabling
issues. The back edge of the OATS on the transmit side can also affect your
Have you tried ferrites on the tx coax? Also move the tx coax around, I'll bet
it will be worked out with coax placement?
Michael Sundstrom
NOKIA
TCC Dallas / EMC
of: (972) 374-1462
cell: (817) 917-5021
amateur call: KB5UKT
From: ext John Harrington
To: craig.har...@jci.com
Sent: Wednesday, July 17, 2002 5:43 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: NSA measurement and its uncertainty
KC,
You don't mention what organization/standard that you are undergoing an
audit with, I'll assume ISO 17025. I think you are correct
KC,
You don't mention what organization/standard that you are undergoing an
audit with, I'll assume ISO 17025. I think you are correct that it would
be very difficult if not impossible to meet the requirements when you add
in uncertainty that takes into account the receiver, antennas,
Look at CISPR 16-1, Annex M for insight. This provides the basis for the
+/- 4 dB.
3 of the 4 dB is already measurement uncertainty with the remaining 1 dB as
site imperfections. However this MU does not
include the signal source or the repeatibility of the test procedure.
Bob Heller
3M
...@majordomo.ieee.org
Subject: Re: NSA above 1 GHz
Mike, in C63.4, the project number is 1-13.2. The contact is Michael
Windler.
michael.j.wind...@us.ul.com
From the latest C63 Newsletter:
The key issues being addressed in this project include ground plane
influences, site reflections
Mike, in C63.4, the project number is 1-13.2. The contact is Michael
Windler.
michael.j.wind...@us.ul.com
From the latest C63 Newsletter:
The key issues being addressed in this project include ground plane
influences, site reflections and practical frequency limits to the
traditional method
Mike,
I am aware that both ANSI and CISPR are currently working on site
requirements above 1GHz. At this point all the work is being done in
committee and therefore the details are not ready for distribution. Not much
more can be said at this point.
Don Rhodes
Principal EMC Engineer
503.685.8588
Mike,
Nothing in ANSI C63.4 or CISPR 22. This is a known weakness in both
committees and it will be worked. Just can't say when. The new version of
C63.4 (coming out soon) does not yet address this. There is nothing going
on in CISPR SC G to add this to CISPR 22. I would suspect that CISPR
victim.
-Original Message-
From: tim.hay...@gecm.com tim.hay...@gecm.com
To: emc-p...@ieee.org emc-p...@ieee.org
List-Post: emc-pstc@listserv.ieee.org
Date: Wednesday, August 04, 1999 11:47 AM
Subject: Re: NSA (using acid)
Hi Folks,
For what it is worth
MURIATIC ACID
Synonyms
Hi Folks,
For what it is worth
MURIATIC ACID
Synonyms: Hydrochloric acid, Spirits of salt.
Safety profile: A corrosive irritant to the skin, eyes, and mucous
membranes. Mildly toxic to humans by inhalation, and moderately toxic
by ingestion. A concentration of 35 ppm causes irritation of
) 509-0073
-Original Message-
From: Brian At Work [SMTP:bkundew...@qtm.net]
Sent: Thursday, July 29, 1999 3:20 PM
To: EMC and Safety list
Subject:Re: NSA (using acid)
A quick question.
Between the muriatic acid and the acid flux that is used to
clean the screen
material
Brian,
The HCl (hydrochloric acid, muriatic acid) combines with the Zn coating
forming zinc chloride in place of the oxides also forming water and/or hydrogen
gas the reaction goes quickly to completion, the ZnCl is highly soluable and
washes or is blown away, leaving clean unoxidized zinc.
My outside Email address has just been changed to b...@anritsu.com from a
longer format. The emc-pstd listserver turned down my note below yesterday.
Please allow me try again after re-subscribing with my new address. Thanks.
Barry Ma
Anritsu Company
www.anritsu.com
-
Original Text
A quick question.
Between the muriatic acid and the acid flux that is used to clean the screen
material, will water dilute the acid good enough to stop its reaction or
should you use something like soda to counteract it? One responder said not
to use water but to just blow it off with compressed
Have you checked the resonance size of your ground plane? Or, multiple
resonance size?
Perhaps, the area where the turntable sits just aggravates all this.
- Robert -
On Thu, 29 Jul 1999, WOODS, RICHARD wrote:
Thanks for all the comments. Some
Richard,
The procedure below is the best conceivable way in terms of cost and
man-power to get the results your looking for given that you mentioned wire
cloth/mesh in your posting. Mesh comes in a variety of sizes, but to my
knowledge is limited in terms of shape. In all my experience cloth
Hi Richard,
I've been tasked with maintaining the ground screen on our OATS and what
worked best for me on galvanized screen (aka hardware cloth) was a tub of
fresh acid flux, such as that found in plumbing stores, and a 300 watt
soldering iron with a wide tip. I don't recommend using a torch
Richard,
I am sure this does not need to be said but felt the need anyway.
Don't use a mesh with a hole size of less than 0.018/dia. Use a solid
sheet for better high frequency response, especially near the turntable.
Kevin
-Original Message-
From: Steve Kuiper
-pstc' emc-p...@majordomo.ieee.org
cc:(bcc: Robert E. Heller/US-Corporate/3M/US)
Subject: RE: NSA
Here is our present status. We added ground screen across the table and
soldered it down. We now pass 3m horizontal by a fraction of a dB, but
vertical is out over a dB. When we moved the receive
...@majordomo.ieee.org
Subject:RE: NSA
Here is our present status. We added ground screen across the table and
soldered it down. We now pass 3m horizontal by a fraction of a dB, but
vertical is out over a dB. When we moved the receive antenna out to 10m we
passed vertical! We are using
these surface variations be a problem? As I indicated before, the site
passed its tests over the last four years. Any other suggestions.
--
From: WOODS, RICHARD
Sent: Friday, July 16, 1999 5:20 PM
To: 'emc-pstc'
Subject: RE: NSA
We have a 10m site
that.
And good luck!
Cortland
== Original Message Follows
Date: 16-Jul-99 14:41:22 MsgID: 1068-126336 ToID: 72146,373
From: WOODS, RICHARD INTERNET:wo...@sensormatic.com
Subj: RE: NSA
Chrg: $0.00 Imp: Norm Sens: StdReceipt: NoParts: 1
We
:22 MsgID: 1068-126336 ToID: 72146,373
From: WOODS, RICHARD INTERNET:wo...@sensormatic.com
Subj: RE: NSA
Chrg: $0.00 Imp: Norm Sens: StdReceipt: NoParts: 1
We have a 10m site, but because of high ambients, we calibrate and test at
3m. So, we have a very large ground screen
Is the problem in Horizontal or Vertical? Is the site high or low? Where
in the 1 to 4 meters is it maximum? What type of antennas are used? What
does the graph look like from 35 to 60 MHz? What is the size of the
turntable? (30 MHz is fairly large compared with most turntables). Can
the 1.5m
table.
--
From: b...@anritsu.com [SMTP:b...@anritsu.com]
Sent: Friday, July 16, 1999 4:00 PM
To: WOODS,RICHARD; INTERNET[ emc-p...@ieee.org]@anritsu.com
Subject: re: NSA
Richard,
Can you detail your procedure to the conclution
Richard,
Can you detail your procedure to the conclution: The problem appears to be
the turn table ?
Barry
-
Original Text
From: WOODS, RICHARD wo...@sensormatic.com, on 7/16/99 12:28 PM:
Argh! For the first time in five years, our NSA is out of spec on our 3
meter OATS at 30 MHz.
OnTue, 20 Jan 1998 12:59:29 -0500, Benoit Nadeau
bnad...@matrox.com wrote:
Subject: NSA tests services
Bonjour de Montreal,
I am presently looking for an outside test laboratory that is capable of
performing a Normalized Site Attenuation test according to the latest
version
Benoit Nadeau wrote:
Bonjour de Montreal,
I am presently looking for an outside test laboratory that is capable
of
performing a Normalized Site Attenuation test according to the latest
version of CISPR22, ANSI C63.4 and the 1997 edition of the VCCI
requirements (with a 80 MHz tuned dipole
Bonjour Benoit,
There are numerous qualified labs that can assist you.
I have had good luck with Elite Electronic Engineering Co. They helped
us perform our NSA and trained us when we first set up our sites. They
operate OATS as well as anechoic chambers, so they should be able to
help you.
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