Answer

VCO is 4.8GHz. The frequency will change as the desired RX or TX channel is changed.
LO clock is equal to the VCO divided by 2.
IF frequency is about 2MHz.
High Frequency External Crystal is 24MHz.
High Frequency Internal RC Oscillator is 12MHz.
Low Frequency Internal RC Oscillator is 10kHz.
Optional Low Frequency External Crystal is 32.768kHz.
Sleep Clock derived from the Low Frequency Internal RC Oscillator is 1kHz.
The RF channel receive path is in the 2.4GHz frequency range.