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DS110DF111: vco programming

Part Number: DS110DF111

When I used the DS110DF111 register to configure Group 0 VCO = 8.5GHz and Group 1 VCO = 10GHz, I found that the signal could not be synchronized during the test. My register configuration is as follows:
0X60 = 0X80;
0X61 = 0XAA;
0X62 = 0X00;
0X63 = 0XB2;
0X64 = 0XFF;
Our application is required 1.0625Gbps/2.125Gbps and 1.25Gbps/2.5Gbps,Please help to see what is the problem, thanks!