Doesn't the relation depend on the order of the filter?
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2018-06-14 14:45, Cortland Richmond wrote:
See https://community.keysight.com/thread/18502
excerpt from an answer to a question:
The PSA has 160 RBW settings. They are referenced to 3 dB bandwidth,
but you can easily figure out how to map a 6 dB bandwidth to our 3 dB
bandwidths. The relationship is basically 6dB bandwidth = 3 dB
bandwidth * sqrt(2).
On 6/14/18 7:59 AM, David wrote:
CISPR 12 and 25 define the RBW for peak and average as a 3 dB
bandwidth, but the QP at 6 dB. Receivers are all 6 dB. Can anyone
explain why? I read through parts of CISPR 16-1-1, and it mainly
seems to describe characteristics of receivers.
What other specs use a 3 dB RBW? MIL STD uses 6 dB, RTCA DO-160 uses
6 dB, and CISPR 16 seems to use 6 dB.
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