Hi,
Customer facing DS110DF1610 could not lock ISSUE. We are test three signal frequency as below,only the 9.95328Ghz can be locked,the other two can not and both reg 0x27 and 0x28 were 0.
10.709225 // not lock
9.95328 // lock (even set reg 0x2f or 0x60~0x63 both setting can lock)
2.48832 // not lock
We had try to set reg0x64 to 0xff and reg0x2f[2] to 0 to turn off PPM check but it's no effect.
register log(10.709225G):
0x60 0x8B
0X61 0XB5
0X62 0X8B
0X63 0XB5
0X64 0X64
0X67 0X20
0X2F 0X26
0X09 0X04
0X18 0X00
0X36 0X30
0X0C 0X00
0X27 0X00
0X28 0X00
after set reg0x36 from 0x30 to 0x00 ( Disable Fast_lock all cap dac ref clock enabled) the CDR was locked.(10.709225G)
0x36 0x00
0x27 0X1D
0X28 0X5A
register log(9.95328G):
0X27 0X1D
0X28 0x5E
0x36 0x30
Thanks