Hey Kevin...
Definitely, i mean AD9548... FTW= 2^48 *80/768 comes from Page.35 of the datasheet... the rest are calculated by the Excel file dedicated by Analog Device in the evaluation software... Please, have a look below with my settings... that DDS Frequency is supposed to be 80MHz but it shows 80.400MHz! I am not still sure if it is the problem because when i measure by an oscilloscope the frequency is correct... I attached the original files...
| System Clock Period / Frequency | 768 | MHz | 500 | 1000 | |
| Selection Priority | 0 | 0 | 7 | ||
| Promoted Priority | 0 | 0 | 0 | ||
| Nominal Reference Period / Frequency | 30 | MHz | 0.000001 | 800 | |
| Inner Tolerance | 1000 | ppm | 1 | 100000 | |
| Outer Tolerance | 0.1 | % | 0.1 | 10 | |
| Validation Timer | 5 | s | 0 | 65.535 | |
| Redetection Timer | 5 | s | 0 | 65.535 | |
| Feed Forward Divide (R) | 125 | 4 | 30000000 | ||
| Feed Back Divide (S) | 335 | 261 | 1280 | ||
| Feed Back Fraction (U) | 0 | 0 | 0 | ||
| Feed Back Fraction (V) | 1 | 0 | 1023 | ||
| (calculated - PFD frequency) | 240.000 | kHz | |||
| (calculated - DDS frequency) | 80.400 | MHz | |||
| Loop Bandwidth | 10 | Hz | 0.001 | 12000 | |
| Phase Margin | 60 | deg | 30 | 88 | |
| 3rd Pole Attenuation Offset | 1000 | Hz | 50 | 240000 | |
| 3rd Pole Attenuation | 3 | dB | 3 | 26 | |
| (calculated - alpha) | 0.001735985 | (-3.9 ppm) | |||
| (calculated - beta) | -9.09728E-06 | (2.2 ppm) | |||
| (calculated - gamma) | -9.77051E-06 | (-1.9 ppm) | |||
| (calculated - delta) | 0.000262424 | (9.9 ppm) | |||
| Phase Lock Threshold | 10 | ns | 0.001 | 65.535 | |
| Phase Lock Fill Rate | 32 | 1 | 255 | ||
| Phase Lock Drain Rate | 68 | 1 | 255 | ||
| (calculated - allowable jitter - RMS) | 10.056 | ns | |||
| (calculated - probability below threshold) | 0.68 | ||||
| Frequency Lock Threshold | 500 | ps | 1 | 3333.33333 | |
| Frequency Lock Fill Rate | 32 | 1 | 255 | ||
| Frequency Lock Drain Rate | 68 | 1 | 255 | ||
| (calculated - allowable jitter - RMS) | 502.787 | ps | |||
| (calculated - probability below threshold) | 0.68 |