I have a couple of reference designs with 2 different crystal oscillators integrated into it. These are cellular radio and can generate standard LTE QAM signals out of it. But I do not have access to high end equipment which can demodulate the signal for vector measurements. So I am looking for ways to test it using available spectrum analyzer (safe to assume it supports the test signal specs). Also safe to assume DUT control gives ability to transmit a known signal.
What tests can I do to compare the oscillator performance on the 2 reference designs using a spectrum analyzer? Phase Noise, Frequency accuracy, etc? And how to measure?