Frequency Modulation Frequency Response

Started by Kyoungmin Kim, 03-09-2014 -- 23:52:51

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Kyoungmin Kim

03-09-2014 -- 23:52:51
Why do I calibrate FM frequency response?
and what is "first carrier null" ?

USMC kalibrater

#1
03-11-2014 -- 06:06:01
 :-o Maybe YOU should stick to dmm's and scopes?
Jason
"Be polite, be professional, but have a plan to kill everybody you meet." -General James Mattis

Hawaii596

#2
03-11-2014 -- 15:39:47
To go off topic slightly, I remember many, many years ago, I used to experimentally measure (just for the fun of it) the various Bessel Nulls.  I calculated using an HP 8566B and it's associated noise floor, I could measure frequency modulation peak deviation in the cases I was measuring to within +/-0.25% of FM setting.  I love Bessel Nulls.  They bring out the nerd in me.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883
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