I am using an SX1272 and am having trouble locating viable distributors of any of the 32 MHz crystals recommended by Semtech, listed in the Crystal Oscillator Guidance documentation. I also can't find distributors for ant of the suggested TCXOs.
Thus, I am looking for alternative parts, with not much more success. The aforementioned documentation specifies that the ESR should be a maximum of 40 ohms, the shunt capacitance a maximum of 7 pF and the load capacitance a maximum of 12 pF. What I am confused about is that the frequency can be anything from 26 MHz to 32 MHz. How can this be? I haven't seen any registers in the device to specify the frequency. It seems that the suggested crystals are 32 MHz, but I can't find any 32 MHz crystals online that have <=40 ohm ESR and all of the other requirements as well.
I may switch to just using an RFM95W module instead; I thought that using the SX1272 by itself would have been a useful exercise.