RFSoC 4x2 GhZ signal generation help

Hi, I’m using the RFSoC 4x2 with PYNQ version 3.0.1. I’m trying to generate a pulsed signal of 4 to 4.5 GHz frequency range utilizing the RFSoC DACs. The sampling rate of the DAC channel within the board is 9.85GSP, so generating frequencies in this range -below half of the sampling rate- should be doable. The NCO overlay and frequency planner notebooks provided, generate waveforms in the MHz range. How do I utilize my DAC channels to generate frequencies in the GHz range? Also, is there an on-borad mixer that I can use to generate waveforms as well? Any help is appreciated, thank you!