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ADL5391 output question

Question asked by 陈han on Jul 13, 2017
Latest reply on Jul 17, 2017 by 陈han

I do a piece of circuit board, schematic and PCB as shown in figure 2 in figure 3

Using the single-ended input, X and Y input signal are the frequency of 1 MHZ, amplitude of 1 VPP sine wave.

Now, there is a problem,:the output waveform is shown in figure 1, appear the phenomenon of two waveform

What causes and how to solve,thanks.