I just wonder if the part runs under SINGLE TONE MODE, input is 500Mhz, output is 50Mhz, how to configure，CFR1，CFR2 and CFR3, 直without external LPF
The simplest way is to stick with the default values of the register. To ensure that this was the case, issue a reset on the AD9910 at the instance that you'll going to use the device. Fill in Profile 0 register (0x0E) at the FTW[0:31] and use the formula at page 23 of the datasheet. Select Profile 0 afterwards.
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