On 10/22/2015 2:53 PM, Grasso, Charles wrote:
ANSI C63 **requires** the use of a preselector on an SA when making QP
measurements
of a signal with a low repetition rate (lower than 20Hz or less). Does
anyone know why?
It's likely that a low-PRF, short pulse able to even approach the QP
limit would require amplitudes high enough to drive a broadband front
end into overload and saturation, adding IMD products to whatever other
emissions an EUT might generate and reducing the _*measured*_ level of
other emissions that could exceed a limit.
Cortland Richmond
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society emc-pstc discussion
list. To post a message to the list, send your e-mail to <[email protected]>
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher: <[email protected]>
David Heald: <[email protected]>
