Joe Nobody is suggesting that KTB noise is revised.
Bruce's original post quoted two articles that state that the thermal contribution to the phase noise floor of a carrier signal is -177dBm/Hz, not -174dBm/Hz. These papers also state that there is an equal contribution of amplitude noise which also equals -177dBm/Hz.
So the total thermal noise floor of a carrier signal is -174dBm/Hz - half of which contributes to amplitude noise, half of which contributes to phase noise. The quoted articles go some way to demonstrating that by both theory and measurement.
regards Grant
------------------------------ Message: 4 Date: Fri, 18 Jan 2013 23:52:37 -0500 From: Joe Leikhim <jleik...@leikhim.com> To: time-nuts@febo.com Subject: Re: [time-nuts] Thermal noise contribution to phase noise Message-ID: <50fa2695.1030...@leikhim.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed I have just sent off an e-mail to David Howe of NIST Metrology requesting clarification about this assertion that KTB is revised -3dB.
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