Hi John,
To achieve 75 MHz of bandwidth, you must choose your corner frequencies appropriately. The corner frequencies are set by the coefficients in table 9, of which there is a limited number of options. Table 10 is just an example of how to set the corner frequencies to achieve a desired center frequency. Take the case below:
Fs = 200 MSPS
Fcenter = 50 MHz
BW = 75 MHz
Fc1 = Fcenter - BW/2 = 12.5 MHz
Fc2 = Fcenter + BW/2 = 87.5 MHz
Fc1 / Fs = 0.0625
Fc2 / Fs = 0.4375
Due to the limited coefficients, choose the closest values. So Fc1 is chosen to be 0.08 (0x9) and Fc2 is chosen to be 0.42 (0x7), as in the last row of table 10. This places the bottom of the bathtub from 16 MHz to 84 MHz.
Regards,
Matt Guibord