there's nothing out after changing the interplation mode from X1 to X2

Question

hi all： I want to change the interplation mode from X1 to X2. The clocks we use are shown below. 
 
 I changed the registers as follows. interpolation mode X2:0x11201 inverse sinc filter:0x11180 
 There are signals out when choose interplation mode X1. But there's nothing out after changing the registers. I want to know where is the problem?

ShineC · Accepted Answer

Hi xiaohexiang, 
 What is the frequency of the tone you are generating from AD9136? Please take note that everytime you change the interpolation, half band filters are being enabled/disabled which means the bandwidth is also changing. This is discussed in page 65 to 66 of the rev D datasheet. 
 Regards, Shine

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there's nothing out after changing the interplation mode from X1 to X2

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