You can select which filter you want by using SPI commands to write to the onboard registers on the ADC.
The NI 5752 Configure ADC.lvproj example in the NI Example Finder shows how to write SPI commands to configure the ADC.
The TI AFE5801 ADC datasheet (ADC used in the 5752/B) includes a register map. You'll see there the Filter_BW address is 7 and relevant registers are 00: 14MHz. 01: 10MHz. 10: 7.5MHz. 11: Not used.
Figure 1: Enabling the 7.5MHz Anti-aliasing filter