| 摘要 |
The invention relates to a testing apparatus ( 21 ) comprising means for receiving signals in a frequency range comprising a plurality of channels. The testing apparatus further comprises means for scanning said frequency range ( 210, 213 ), means for detecting at least one channel comprising a digital signal ( 211 ), means for measuring a bit error rate of said digital signal ( 212 ), means for performing at least one comparison between said bit error rate and at least one threshold ( 213 ), and means for determining a quality of said channel on the basis of said comparison.
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