CH1 Failed The waveform of TDR function is not good.　 

TDR/Sampling Waveform abnormality Compensation Fail Frequency Range/ Bandwith DC-20GHz Trr<17.5ps Max. Vertical Sensitivity 1 V Min. Vertical Sensitivity 10 mV Number of Channels 2 DynamicRange +-1.6V Pulse Polarity +/- Differential Noise 750uVrms(Type) TDR 2ch Trr <35ps Amplitude 250mV Pol:+ or - Repetation 25K,50K,100K,250KHz

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