Can we use HMC704LP4E and/or HMC835LP6GE for getting RFVCO output frequency of exactly 10750MHz/3 (= 3583.333333333333........MHz)? If yes, how should I set register for that? (Referen frequency is 10MHz.).
Thanks & Regards,
You can generate this frequency with either part using "exact frequency" mode.
With 10MHz reference your integer boundary is 3580MHz and desired output frequency is 10750/3 MHz=(10740+10)/3=3580MHz +10/3 MHz.
Exact frequency mode splits the frequencies between integer boundaries into equally spaced channels. If we set the number of channels to 3 (Reg0C=3) we get two equally spaced channels appearing at 1/3 and 2/3's spacing between the two integer boundaries.
Pick the first channel to get exactly 3580MHz+10/3 MHz output frequency. You pick this channel by setting the fractional-n frequency registers to just over the desired channel frequency.
Now round up to set the fractional-n value just over the exact frequency channel:
If you turn exact frequency mode off (Reg0C=0) the output frequency will be off by a little bit -- instead of 3583.333...MHz you will get 3583.333333730697MHz.
Thank you for your answer. I'll try.
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