Tool/software:
Datasheet does not specify phase noise below 1KHz. Assuming that in the range 1Hz-1KHz from carrier I want to know phase noise, what would be the best estimate? With assumption that in that range, phase noise is dominated by reference clock (10MHz) and I want to synthesize 100MHz, can I use rule of thumb "doubling the frequency will add +6dB of phase noise" (synthesizing 100MHz from 10MHz will ad +20db), or there is calculator/simulation tool which will give actual phase noise for this or any configuration using LMX2820?
Note: 10MHz reference is atomic clock. In other words, it is not known if actual clock or LMX2820 is the main contributor to the phase noise in the range 1Hz-1KHz. For atomic clock, phase noise is specified in the range 1Hz and above.
Thanks,
Slavisa