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Noise Figure » History » Version 47

GOMEZ, Ramon, 12/13/2015 07:15 PM

1 47 GOMEZ, Ramon 
h1. 3.2 Noise Figure
2 2 HAENNIG, Gerald 





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The purpose of this section is to assess the thermal noise degradation induced by the optical link. Related measurement parameter is the Noise Figure (measured with the FSV spectrum Analyzer).





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The optical link output power is measured with an input termination (done with 50 Ohm termination instead of 75 Ohm as it wasn't available) at a temperature of 290 K.





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Noise Factor :





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F = No / kToBG (No : measured output power noise; k : Boltzman constant ;  To : ambiant temperature close to 290 K ; B : measurement bandwidth ; G : RF Gain)





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Noise Figure :





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NF=10*log10(Ftot)





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The table below contains the Noise Figure measured on the optical link.





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|_. Parameter |_. Unit |\5=. Measurements |





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|_. Frequency |_. MHz |=. 700 |=. 1000 |=. 1500 |=. 2000 |=. 2300 |





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|_. Optical Link Noise Figure |_. dB |=. 30.9 |=. 30.1 |=. 31.3 |=. 32.6 |=. 33.4 |