i use register as follow,but it does not lock , the ref is 40M,pfd is 20M output frequency is 985M,integer mode , how can slove this problem
LTC6948_write(0x01,0x04);
LTC6948_write(0x02,0x0c);
LTC6948_write(0x03,0Xbd);
LTC6948_write(0x04,0X28);
LTC6948_write(0x05,0X00);
LTC6948_write(0x06,0X10);
LTC6948_write(0x07,0Xc5);
LTC6948_write(0x08,0X00);
LTC6948_write(0x09,0X00);
LTC6948_write(0x0a,0X00);
LTC6948_write(0x0b,0Xbc);
LTC6948_write(0x0c,0X4f);
LTC6948_write(0x0d,0Xe4);
add register data
[edited by: FreedomSabre at 12:47 PM (GMT 0) on 26 Dec 2019]