I used ADF5356 PLL synthesizer. And i use reference oscillator freq is 10MHz with initially offset 0.1ppm and stability is 10 ppb. I need to output freq is 3750 MHz.
Expected output result:
10MHz × 0.1 ppm = 1 Hz
So, i use doubler option.
10 MHz × 2 = 20.000002 MHz
VCO output 3750 MHz
3750 MHz × 0.1 ppm = 375 Hz
Total output freq is = 3750.000375 MHz
Actual output is offset vary every power on and off for system. Every power on different offset came.
I did not get stable offset. Loop filter 5 KHz
Please help this problem.
Thanks and Regards Purushothaman