SOURCEFORGE » RALF » 2015 Evaluation and test of an optical / L-band tranceiver

h1. Noise Figure

The Noise Figure has been measured with the FSV spectrum Analyzer.

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

Noise Factor :

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

Noise Figure :

NF=10*log10(Ftot)

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

|_. Frequency |_. Optical Link Noise Figure |

|_. MHz |_. dB |

|=. 700 |=. 30.9 |

|=. 1000 |=. 30.1 |

|=. 1500 |=. 31.3 |

|=. 2000 |=. 32.6 |

|=. 2300 |=. 33.4 |

|_. Position |_. Setting |\_. Measured |

|=. A |=. 1000 |=. 1050 |=. 950 |

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

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

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