nce.com]
Sent: Tuesday, August 17, 2010 12:37 AM
To: Derek Walton; Price, Edward
Cc: emc-p...@ieee.org
Subject: Re: Calibration supplier for signal generator with pulse modulation
For some reason, the list server is rejecting the following message I posted
in response to Ed’s:
“One answer to t
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Ken Javor
Sent: Thursday, August 12, 2010 6:31 AM
To: Untitled
Subject: Re: Calibration supplier for signal generator with pulse modulation
And similarly, not because of MU but because of 17025 or perhaps ISO 9000, I’ve
seen
#x27;s a Boddingtons with my name on it...
Good night,
Derek.
From: Deniz Demirci
To: lfresea...@aol.com; b...@toprudder.com; emc-p...@ieee.org
Sent: Thu, Aug 12, 2010 9:17 pm
Subject: RE: Calibration supplier for signal generator with pulse modulation
Hi Derek,
So, we all are comfortable wi
Demirci; b...@toprudder.com; emc-p...@ieee.org
Subject: Re: Calibration supplier for signal generator with pulse modulation
Hi Deniz,
what entity is going to do something of little value unless forced to? Of
course MU is done for auditing reasons. Very few tests require it in EMC..
Please do not
@ieee.org
Sent: Thu, Aug 12, 2010 7:59 pm
Subject: RE: Calibration supplier for signal generator with pulse modulation
If MU is only for audit purpose, it won’t help at all.
If you are using MU for your benefit, there are always some improvement
opportunities in your test setup.
If you can’t quan
]
Sent: Thursday, August 12, 2010 5:43 PM
To: Deniz Demirci; b...@toprudder.com; emc-p...@ieee.org
Subject: Re: Calibration supplier for signal generator with pulse modulation
Again, how do you guarantee / justify what you are doing if you don't care
about the MU.
I don't see how MU he
From: Deniz Demirci
To: Bob Richards ; emc-p...@ieee.org
Sent: Thu, Aug 12, 2010 2:51 pm
Subject: RE: Calibration supplier for signal generator with pulse modulation
I've been performing in-house calibrations of LNA's, LISN's, CDN's, Current
clamps and they have been accepted b
scorp.com/about/locations
From: emc-p...@ieee.org on behalf of Bob Richards
Sent: Thu 8/12/2010 7:51 AM
To: emc-p...@ieee.org
Subject: Re: Calibration supplier for signal generator with pulse modulation
--- On Thu, 8/12/10, Ken Javor wrote:
And similarly, not because of MU but because of 17025
--- On Thu, 8/12/10, Ken Javor wrote:
And similarly, not because of MU but because of 17025 or perhaps ISO
9000, I’ve seen test equipment that could easily have been calibrated in house,
such as current probes, LISNs and a 41 inch rod antenna have to be sent to the
calibration lab.
nna is good.
Ken Javor
Phone: (256) 650-5261
From: Cortland Richmond
Reply-To:
List-Post: emc-pstc@listserv.ieee.org
List-Post: emc-pstc@listserv.ieee.org
List-Post: emc-pstc@listserv.ieee.org
Date: Thu, 12 Aug 2010 07:24:17 -0400
To: emc-pstc
Subject: Re: Calibration supplie
-pstc
Subject: Re: Calibration supplier for signal generator with pulse modulation
A tangential issue: those who rely on that algorithmic process often don't know
why certain things are required and others left unsaid. I've see a manager
forbid using a high-pass filter during CE testi
on was required!
Cortland
KA5S
- Original Message -
From: Ken Javor <mailto:ken.ja...@emccompliance.com>
To: Untitled <mailto:emc-p...@ieee.org>
Sent: 8/11/2010 1:04:51 PM
Subject: Re: Calibration supplier for signal gener
2010 22:02:17 -0400
> To: emc-pstc
> Subject: Re: Calibration supplier for signal generator with pulse modulation
>
> MIL-STD 461E does not usually ask we be particularly accurate, merely
> sufficient.
>
> QUOTE
> 4.3.1 Measurement tolerances.
> Unless otherwise stated f
antenna is calibrated in a 50 Ohm
>> system (albeit likely using pads between antenna and cable for
> calibration).
>> If further accuracy is desired, most manufacturers provide vswr
>> characteristics for their antennas.
>>
>> Fear isn't the issue. The iss
requirements one be able to read 1% on a printed
plot!)
Cortland
KA5S
> [Original Message]
> From: Sundstrom, Michael
> To: Ken Javor ; EMC-PSTC@LISTSERV.IEEE.ORG
> Date: 8/11/2010 1:25:38 PM
> Subject: RE: Calibration supplier for signal generator with pulse
modulation
>
&
ssage]
> From: Ken Javor
> To: Untitled
> Date: 8/11/2010 1:03:09 PM
> Subject: Re: Calibration supplier for signal generator with pulse
modulation
>
> This gets back to Mr. Walton's differentiation between EMI testing and
> calibration laboratories.
>
> Clearly mod
, as Derek emphasizes.
Gert
Van: emc-p...@ieee.org [mailto:emc-p...@ieee.org] Namens lfresea...@aol.com
Verzonden: woensdag 11 augustus 2010 18:00
Aan: deniz.demi...@ntscorp.com; emc-p...@ieee.org
Onderwerp: Re: Calibration supplier for signal generator with pulse modulation
Hi Deniz
for signal generator with pulse modulation
Van: emc-p...@ieee.org [mailto:emc-p...@ieee.org <mailto:emc-p...@ieee.org?> ]
Namens Dennis Ward
Verzonden: woensdag 11 augustus 2010 18:50
Aan: lfresea...@aol.com; deniz.demi...@ntscorp.com; emc-p...@ieee.org
Onderwerp: RE: Calibration supplier for
In message , dated Wed, 11
Aug 2010, Ken Javor writes:
>If you live far from the broadcaster, something emitting right at the
>limit may cause objectionable interference.
Even below the limit. I am in a null area for TV from the London Crystal
Palace transmitter and even with a high-gain ante
But the uncertainty in that process is huge. So the whole edifice rests
on
feet of clay.
Agreed John, so why worry about a few dB here and there
From: John Woodgate
To: emc-p...@ieee.org
Sent: Wed, Aug 11, 2010 12:31 pm
Subject: Re: Calibration supplier for signal generator
ing to try.
Ken Javor
Phone: (256) 650-5261
> From: John Woodgate
> Date: Wed, 11 Aug 2010 18:31:43 +0100
> To:
> Subject: Re: Calibration supplier for signal generator with pulse modulation
>
> In message , dated Wed, 11
> Aug 2010, Ken Javor writes:
>
>> E
Van: emc-p...@ieee.org [mailto:emc-p...@ieee.org] Namens Dennis Ward
Verzonden: woensdag 11 augustus 2010 18:50
Aan: lfresea...@aol.com; deniz.demi...@ntscorp.com; emc-p...@ieee.org
Onderwerp: RE: Calibration supplier for signal generator with pulse modulation
What’s really needed is
In message , dated Wed, 11
Aug 2010, Ken Javor writes:
>EMI limits are quite arbitrary;
Well, not quite. They are set, or re-set, so as to keep complaints of
EMI to an acceptable minimum. But the uncertainty in that process is
huge. So the whole edifice rests on feet of clay.
--
OOO - Own Op
estly
bestows on an inherently inaccurate and imprecise discipline.
Ken Javor
Phone: (256) 650-5261
> From: Deniz Demirci
> Date: Wed, 11 Aug 2010 08:35:06 -0700
> To: Untitled
> Conversation: Calibration supplier for signal generator with pulse modulation
> Subject: RE: Calibrat
Date: Wed, 11 Aug 2010 09:50:21 -0700
To: , ,
Subject: RE: Calibration supplier for signal generator with pulse modulation
I think I would only add that while measurement uncertainties for EMC is
nebulous at best, at the same time we do not want to get into the habit of a
slam dunk mentality o
ational Technical Systems (NTS Canada)
> Phone: 403-568-6605 ext 244
> fax: 403-568-6970
> email:deniz.demi...@ntscorp.com
> web: http://www.ntscorp.com/about/locations
>
>
>
> -Original Message-
> From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Ken
&
:emc-p...@ieee.org?>
] On Behalf Of Ken
Javor
Sent: Wednesday, August 11, 2010 7:55 AM
To: Untitled
Subject: Re: Calibration supplier for signal generator with pulse
modulation
Precisely.
Ken Javor
Phone: (256) 650-5261
orp.com/about/locations
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org <mailto:emc-p...@ieee.org?>
] On Behalf Of Ken
Javor
Sent: Wednesday, August 11, 2010 7:55 AM
To: Untitled
Subject: Re: Calibration supplier for signal generator with pulse
modulation
Precis
: Untitled
Subject: Re: Calibration supplier for signal generator with pulse
modulation
Precisely.
Ken Javor
Phone: (256) 650-5261
> From: Cortland Richmond
> Reply-To:
> Date: Wed, 11 Aug 2010 08:27:34 -0400
> To: emc-pstc
> Subject: re: Calibration supplier for signal gener
In message , dated Wed, 11
Aug 2010, Ken Javor writes:
>Precisely.
... or should that be 'accurately'. We must use these meteorological
terms correctly! (;-)
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
Precisely.
Ken Javor
Phone: (256) 650-5261
> From: Cortland Richmond
> Reply-To:
> Date: Wed, 11 Aug 2010 08:27:34 -0400
> To: emc-pstc
> Subject: re: Calibration supplier for signal generator with pulse modulation
>
> Not quite what you need to know but I&#
@listserv.ieee.org
Date: Wed, 11 Aug 2010 13:18:05 +
To: "EMC-PSTC@LISTSERV.IEEE.ORG"
Conversation: Calibration supplier for signal generator with pulse modulation
Subject: RE: Calibration supplier for signal generator with pulse modulation
And now almost getting back to the original question and a
supplier for signal generator with pulse modulation
Subject: RE: Calibration supplier for signal generator with pulse modulation
I guess the equipments in Apollo project hasn’t only pass the tests with no
margin :-) They may have required quite a big margin so MU is not an issue at
all…
Commercial
Not quite what you need to know but I've used signal taps or directional
couplers with a 'scope to watch the RF waveform and set modulation depth,
and a calibrated counter, or even a receiver or analyzer will for
frequency. One always has recourse to calibrated devices to monitor
another, uncalibra
Not quite what you need to know but I've used signal taps or directional
couplers with a 'scope to watch the RF waveform and set modulation depth,
and a calibrated counter, or even a receiver or analyzer will for
frequency. One always has recourse to calibrated devices to monitor
another, uncalibr
t sample enclosure and or the circuitry within.
Ken Javor
Phone: (256) 650-5261
> From: John Woodgate
> Date: Tue, 10 Aug 2010 22:33:13 +0100
> To:
> Subject: Re: Calibration supplier for signal generator with pulse modulation
>
> In message , dated Tue, 10
> Aug 2010, Ken
In message , dated Tue, 10
Aug 2010, Ken Javor writes:
>That is all background. The unalterable fact, regardless of how MU has
>been misapplied and perverted, is that it applies to the measurement
>facility itself; something that inherently will have an uncertainty on
>the order of several d
ist-Post: emc-pstc@listserv.ieee.org
List-Post: emc-pstc@listserv.ieee.org
Date: Tue, 10 Aug 2010 10:39:37 -0700
To:
Conversation: Calibration supplier for signal generator with pulse modulation
Subject: RE: Calibration supplier for signal generator with pulse modulation
I guess the equipments
sea...@aol.com [mailto:lfresea...@aol.com]
Verzonden: dinsdag 10 augustus 2010 21:16
Aan: ce-test, qualified testing bv - Gert Gremmen; j...@jmwa.demon.co.uk;
emc-p...@ieee.org
Onderwerp: Re: Calibration supplier for signal generator with pulse modulation
Hi Gert,
I think you would be better say
ug 10, 2010 12:34 pm
Subject: RE: Calibration supplier for signal generator with pulse modulation
MU is of course the only way of knowing what you do/measure and ultimately test.
But if it need to be taken into account…. is another story.
But if you do not know where your errors are, I guess
yo
In message <8cd06c5a43f24be-12a8-...@webmail-m087.sysops.aol.com>, dated
Tue, 10 Aug 2010, lfresea...@aol.com writes:
>just stressing Ken's use of the word unwarranted. I'm personally
>vehemently opposed to MU in EMC measurements: the reason why is that
>end to end even 10 dB is a trivial error
out/locations>
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of
lfresea...@aol.com
Sent: Tuesday, August 10, 2010 11:07 AM
To: j...@jmwa.demon.co.uk; emc-p...@ieee.org
Subject: Re: Calibration supplier for signal generator with pulse modulation
HI John,
just stressing Ken&#x
??
Gert Gremmen
ce-test, qualified testing bv
Van: emc-p...@ieee.org [mailto:emc-p...@ieee.org] Namens lfresea...@aol.com
Verzonden: dinsdag 10 augustus 2010 19:07
Aan: j...@jmwa.demon.co.uk; emc-p...@ieee.org
Onderwerp: Re: Calibration supplier for signal generator with pulse
x27;t needed to put a man on the moon it sure as heck isnt
needed in washing machines, computers etc.
I'm guessing this is more than 10 cents worth!
Derek Walton
L F Research.
From: John Woodgate
To: emc-p...@ieee.org
Sent: Tue, Aug 10, 2010 11:46 am
Subject: Re: Calibration supplier for s
Regardless of what has been done, it is still technically unwarranted.
Ken Javor
Phone: (256) 650-5261
> From: John Woodgate
> Date: Tue, 10 Aug 2010 17:46:08 +0100
> To:
> Subject: Re: Calibration supplier for signal generator with pulse modulation
>
> In message , d
In message , dated Tue, 10
Aug 2010, Ken Javor writes:
>Uncertainty for modulation parameters of depth or pulse on-off ratio
>and time duration? Uncertainty applies to things like field intensity,
>where the construction of the room or OATS and near field effects
>combine to provide signific
pulse modulation
> Subject: RE: Calibration supplier for signal generator with pulse modulation
>
> Is there an acceptable method in any immunity standards, or the tolerance
> specified anywhere for checking the modulation?
> You need to come up with an uncertainty number if you are perf
, August 10, 2010 9:39 AM
To: Untitled
Subject: Re: Calibration supplier for signal generator with pulse modulation
Amplitude and pulse modulation parameters are adequately checked with a
calibrated o'scope.
And even frequency could be checked with your EMI receiver, assuming it is
calib
; To: Untitled
> Conversation: Calibration supplier for signal generator with pulse modulation
> Subject: RE: Calibration supplier for signal generator with pulse modulation
>
> The amplitude of signal source may not need calibration because you calibrate
> the field at the end with ca
fax: 403-568-6970
email:deniz.demi...@ntscorp.com
web: http://www.ntscorp.com/about/locations
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Ken Javor
Sent: Tuesday, August 10, 2010 7:05 AM
To: Wendy Nya; Untitled
Subject: Re: Calibration supplier for signal generator with pulse
titled
> Sent: Tue, 10 August, 2010 21:04:33
> Subject: Re: Calibration supplier for signal generator with pulse modulation
>
> Why would the signal source need calibration? Normally, it is the signal
> measurement devices that require calibration. Further, this signal source
> l
In Radiated Immunity, the amplifier output is not calibrated. Rather it is the
signal generator, power meter, power heads and field probe.
From: Ken Javor
To: Wendy Nya ; Untitled
Sent: Tue, 10 August, 2010 21:04:33
Subject: Re: Calibration supplier for signal generator with pulse modulation
Why would the signal source need calibration? Normally, it is the signal
measurement devices that require calibration. Further, this signal source
likely requires some amplification in order to provide the required signal
for EMI testing, so that it is the amplified output which must be measured,
n
53 matches
Mail list logo
