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SX1301 custom channels

Hi,

I have two questions regarding a custom LoRa application using SX1301:

1. What is the minimum required spacing between the 8 channels on SX1301 without introducing interference?
2. Is it possible to have 8 lora channels (IF0-7) + 1 legacy FSK channel (IF09) that listens to packets simultaneously? Or must you disable 1 one of the lora channels to have 7 channels (IF0-6) + 1 FSK channel (IF9) for it work?

The FSK channel would be used for WMBus mode C1 RX.

Band: EU868

Thanks in advance

/Thibault