ADCSampleRate = 3.93216 GHz
DACSampleRate = 4.91520 GHz
GCD(ADCSampleRate/16 , DACSampleRate/16) = 61.44 MHz
Integer Sub - Multiple AND < 10 MHz = 7.68 MHz
These equations generate a SYSREF frequency that satisfies the requirements of the RF-ADC/RF-DAC internal clocking. The SYSREF signal is also being captured synchronously by the PL; because of this, the SYSREF frequency must also be a submultiple of the PL clock driving the IP interfaces or any other clock interacting with the PL SYSREF.