I have an RFM95 module, that I connect through SPI to a microcontroller. Does the quality of the SCK clock of the SPI affect the quality of the antenna modulation, or just the quality of the communication between the two devices?
In other word, does the frequency of the microcontroller influence the quality of the modulation?
Thank you for any help 
The quality of the SCK (Serial Clock) signal in SPI communication primarily affects the reliability and speed of communication between the microcontroller and the RFM95 module.
It does not directly impact the quality of modulation of the RF signal transmitted by the RFM95 module (the direct modulation process itself is typically handled by dedicated circuitry within the RFM95 module)
Looks like the answer that Chatgpt gave me, but it makes sense, so I'll mark it as correct
Thank you for your time, have a nice day!
Not directly, although the frequency of the microcontroller does impact the sensitivity of the receiver a bit.
In particular for the libraires that by default continuously poll a register in the LoRa device across the SPI interface for packet received, then on a fast microcontroller, an ESP32 for instance, this can generate enough RFI to loose you a few dB in receiver sensitivity ............
But you would not expect Chatgpt to know that.
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