RF Synthesizer Tuning Frequencies

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Canooski

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I am using a Max2900 transmitter. This includes a frequency synthesizer that can be tuned in the 902-928 ISM band. It has 3 digital inputs to select the divide by ratio. How does this determine which frequency the transmitter is tuned at and what frequencies can this transmitter tune to based upon this?
 

I am still confused. For instance one of the division values is 250. The fref is 14.56 MHz.

14.56Mhz/1000 ??? Shouldnt it be in the 902-928 Band
 

You'll want to read the expression as commonly usual
frf = (fref/4)*divider
 

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