hi all,
I get a strange question when i test my CDCE62005.
here i have four BOARD， A, B ,C ,D. A and B was same； C and D was same。
they all have the same configuration：
REF_SEL was set to PRI_CLK；
PRI_CLK = 10MHz；
VCO = 600MHz；
OUTPUT DIVIDER = 60;
OUTPUT = 10MHz.
and i want to sent the output of A to the input of B，and sent the output of B to C， and the input of D was from the output of C. and i did！
but the OUTPUT of B was not 10Mhz，however the output of A was 10MHz.
so i get some test：
1. test the output of A,B,C,D， when the input was float . and get what was happening at POWER ON.
2. test the output of A,B,C,D, following 1，sent a 10MHz at input.
3. test the output of A,B,C,D，and there was a 10MHz on the input whenthe boards was power on.
the result was strange。
1. A and C have not output， but B and D get 10Mhz（actually it was 10.1Mhz or 9.87MHz） frequency at the output pins.
2. A and C get 10MHz output，but B and D get another frequency around 10MHz（9.8Mhz or 10.2MHz ..）。
3. they all get 10MHz putput。
when i looks insight of the wave of power on，i find that A and B have a 40MHz at beginning。
here i get some image：
1. the output of A,B,C,D in TEST1
A: 
B:
C:
D:
the image of A，it was a 40MHz signal. and A was AC COUPLING.
3: the output of A,B,C,D in TEST3
A:
C:
so it was the question：
1. why i get a 40MHz signal form output？
2. why i get a output frequency without input？
3. how can i make all the boards get the same status with C？
Thanls~