Patent ID: 9325987
Filing Date: 2016-04-26
CPC Classification: G01R,H04L,H04N

Claim Text:
1. A device for monitoring a signal, comprising: a combiner ( 103 , 303 ) configured to combine the received signal to be monitored with an impairment signal; a signal spectrum analyzer ( 105 , 305 ) configured to analyze spectrum of a signal output from the combiner ( 103 , 303 ) upon receiving a trigger signal; a signal quality analyzer ( 108 , 308 ) configured to analyze the signal output from the combiner and output a signal quality factor; a trigger generator ( 110 , 310 ) configured to monitor the signal quality factor and output the trigger signal upon detecting the signal quality factor below a trigger threshold level; and an impairment simulator ( 1 12 , 312 ) configured to generate the impairment signal and an impairment scaler ( 113 , 313 ) configured to scale the impairment signal and input the scaled impairment signal to the combiner ( 103 , 303 ).