External clock could be also used, like GPSDO or rubidium reference clock, aligned on 28.8MHz. Some manufacturers integrate a 0.5ppm TCXO. It's the best second option, after an external clock. Based ...
This, alongside with configurable output CMOS level, makes the circuit compatible with many available baseband ICs. Integrated stabilized voltage sources for TCXO, external LNA and active antenna ...