Could you clarify when you would choose to use an average detector for
radiated emissions between 30 and 1000 MHz?
On 4/5/2024 6:39 PM, Ralph McDiarmid wrote:
I’m having trouble with /“Of those disturbances above (L-20dB), where
L is the limit level in logarithmic units, the disturbance levels and
the frequencies of at least the six highest disturbances shall be
recorded.”/
//
Does this CISPR measurement methods standard expect you to record the
six highest signals which are less than or equal to -20dB wrt the
*average limit* when using an*average detector *and the*QP limit *when
using a*QP detector*? Perhaps that is made clear in the
product-specific standard (like EN55022 or CISPR 11, etc)
Comments?
//
/Ralph/
*From:*Stultz, Mark <00000f79f2e10e47-dmarc-requ...@listserv.ieee.org>
*Sent:* Friday, April 5, 2024 12:33 PM
*To:* EMC-PSTC@LISTSERV.IEEE.ORG
*Subject:* [PSES] Radiated Emissions - How many points to QP?
Hello PSES brain trust,
When doing radiated emissions measurements, how many frequencies
should be quasi-peaked?
CISPR 16-2-3 clause 6.4.9 states:
/“Of those disturbances above (L-20dB), where L is the limit level in
logarithmic units, the disturbance levels and the frequencies of at
least the six highest disturbances shall be recorded.”/
We have always done QP measurements on all peak measurements above the
limit, even if that is more than six points.
I have a lab arguing that they only need to measure the top six,
regardless of how many peak measurements are above the limit.
Any thoughts are appreciated.
Thanks,
Mark
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