I'm looking for more info on the equation for setting the discriminator bandwidth. I see the equation on page 22 of the data sheet, but I can't figure out the meaning. Is the result of this equation an actual bandwidth or is it the setting in the register (or both)? Where does the 800k in the denominator come from?

Thanks,

Tim

Hi Tim,

Discriminator_BW on page 22 of the ADF7020 datasheet refers to the value that should be programmed in the register.

The 800kHz in the denominator is 4*IF Frequency. This setting is used to achieve best SNR performance.

If you wanted to for example increase the discriminator BW you can increase the value you use for the frequency deviation in the calculation of the value of k.