Reference
Bandwidth for Un
fi
ltered
Frequency Settings
The curve calculation of frequency response for the un
fi
ltered frequency settings
(for example, 2 GHz, 2.5 GHz, 21 GHz, 12.5 GHz, 14 GHz, 20 GHz, 30 GHz,
40 GHz, 50 GHz, 65 GHz, and 80 GHz) uses the de
fi
nition for dB and optical
bandwidth:
–3 dB = 10 log(vertical swing at frequency / vertical swing at DC)
Bandwidth for Reference
Receiver Settings
The curve calculation of frequency response for reference receiver settings (FC,
GbE, In
fi
niband, and OC/STM standards) uses the de
fi
nition of dB and bandwidth
that matches the industry standard which assumes electrical bandwidths:
–3 dB = 20 log(vertical swing at frequency/vertical swing at DC)
80C12B Optical Sampling Module User Manual
23