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What is SSB meaning in phase of SSB phase noise?

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Apr 14, 2002
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What is SSB meaning in phase of SSB phase noise?

What is SSB stand for?

SSB phase noise means Single Side Band phase noise, i.e. the phase noise measured in W/sqrt(Hz) in a given offset from the carrier. It can also be an integrated phase noise of a given bandwidth.

You can find more info in almost any RF book on oscillators and PLL's (phase locked loops).

SSB noise usualy takes the unit dBc (ex. -100dBc) at offset frequency of xx Hz from the ceter frequency.


to point to the drip

rf is a circle like a plop

but ssb is a plop plipp { the plipp being the next circle out

like mushrooms grow but at the frq in circles at your antenna {dipole}

radiation pattern

is ssb

the plipp of the plop without the plop{the plop is filtered out suppressed carrier}

the correct definition


single sideband supressed carrier { or sideways modulated supressed remodultated suppressed carrier }

the phase noise appering as intermodulation componet of the main carrier frequency{suppressed

{this derives the sidebands by mixing products of the double balanced modulator needed in analoge terms to produce ssb }

so the phase noise would appear as inter modulation of the center freq of the sidebands of the carrier

it depends on what you are looking at...

...for instance, if you are talking about oscillators, then you might want to measure the phase noise at a spot frequency offset from the carrier. But this is just the phase noise on one side of the carrier, hence Single Sideband phase noise. The number would be something like -90dBc/Hz@100kHz away from the carrier. The measurement bandwidth is assumed to be 1Hz. However, if you want the real effect, you need to integrate the phase noise over a certain offset. So lets say you integrate the phase noise offset from the carrier from 100Hz to 10KHz. This is the integrated phase noise power on only one side of the carrier. There is an equal amount of noise on the other side of the carrier. So after the integration, you add an extra 3dB and you now have Double Side Band integrated phase noise.

Mixers, well... that's a little different. Steve Mass has the best explanation in his mixer book or we can continue the discussion here if you like.

ssb phase noise

please explain Phase spectral density

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