:02 PM
To: Ken Javor; Ralph McDiarmid; ieee pstc list
Subject: RE: Conducted Emissions PK/AVG
Your point is well taken Ken, and this certainly is interesting. My
approach to the concept of "average" does indeed run afoul of the
limitations of measurement devices and the potential for
com.com; Ralph McDiarmid; ieee pstc list
> Subject: Re: Conducted Emissions PK/AVG
>
>
> Now this is getting interesting. If you arbitrarily reduce the VBW until
> you see no time dependent amplitude variation, I think that leads to
> non-repeatability. That is, if my spectrum anal
17, 2004 8:14 PM
> To: bdew...@ix.netcom.com; Ralph McDiarmid; ieee pstc list
> Subject: Re: Conducted Emissions PK/AVG
>
>
> Now this is getting interesting. If you arbitrarily reduce the VBW until
> you see no time dependent amplitude variation, I think that leads to
> non-repea
;Brent DeWitt"
> Reply-To:
> Date: Fri, 17 Dec 2004 18:39:11 -0800
> To: "Ralph McDiarmid" , "ieee pstc list"
>
> Subject: RE: Conducted Emissions PK/AVG
>
> Hi Ralph,
>
> The HP 8568 and 8566 have a "video averaging" function, which av
il: brent.dew...@ckc.com
phone: 425-883-4757
cell: 425-417-8228
> -Original Message-
> From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org]On Behalf
> Of Ralph McDiarmid
> Sent: Friday, December 17, 2004 11:51 AM
> To: ieee pstc list
> Subject: RE: Conduc
er-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org] On Behalf
Of Cortland Richmond
Sent: December 16, 2004 1:04 PM
To: Alex McNeil; ieee pstc list
Subject: Re: Conducted Emissions PK/AVG
Alex McNeil asked:
>> Is the problem that the Test House may have used "AVG BW 30KHz" and
>&g
Alex McNeil asked:
>> Is the problem that the Test House may have used "AVG BW 30KHz" and this
should have been "AVG BW 9KHz" the problem <<
Sure looks like it from what you posted. There've been discussions here --
it comes up every so often -- how to to do averaging on a SA. Without
knowing how
>>>scale set to LOG, <<<
OOPS, that should have been LINEAR Sorry.
Bob Richards wrote:
Alex,
It is very common that the emissions plots will be made with the RBW and VBW
that you mentioned. The actual QP and AV measurements should have the
instrument set with the appropriate detector a
Alex,
It is very common that the emissions plots will be made with the RBW and VBW
that you mentioned. The actual QP and AV measurements should have the
instrument set with the appropriate detector and bandwidths. The RBW should
always be 9kHz, and for the average measurement the VBW should be
si
: Thursday, December 16, 2004 8:19 AM
To: emc-p...@ieee.org
Subject: Conducted Emissions PK/AVG
Hi Guys,
I had a product tested that failed the conducted emissions. The switch mode
power supply was the problem. It runs at approx. 200KHz. The failed readings
were in the 150KHz to 600KHz band. The
Are you sure it says AVG BW 30kHz, and not AVG BW 30 Hz? Is this a typo?
Also, quasi-peak should always be at or below the peak measurement. This is
why a peak measurement can be made (quickly) and compared to the quasi-peak
limit line, and if all the peaks are below the quasi-peak limit, the
meas
Hi Guys,
I had a product tested that failed the conducted emissions. The switch mode
power supply was the problem. It runs at approx. 200KHz. The failed readings
were in the 150KHz to 600KHz band. The peaks were over the Avg and below the
QPk, so the Avg test was done. This resulted in the failures
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