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CC1310: CC1310 15.4 LRM configuration for 868.000 - 868.600, 868.700 - 869.200, and 869.300 - 869.400 Mhz

John Auxillos
Prodigy 60 points
Part Number: CC1310

Hi there!

I am trying to test out the 15.4 software and going through the getting started guide. I got the default settings to work but I'd like to make it compatible with our country's radio laws. We need to operate at the following frequencies with not more than 25mW erp:

  • 868.000 - 868.600 Mhz
  • 868.700 - 869.200 Mhz
  • 869.300 - 869.400 Mhz

Questions:

  1. Given the APIMAC_STD_ETSI_863_PHY_3 splits into 34 channels and given the above channels, I should be creating a mask for 0x19, 0x1A, 0x1B, 0x1D, 0x1E (CH 25, 26, 27, 29, 30). This means that frequency hopping will occur only between these channels. Is this the correct understanding?
  2. If we enable long-range mode (LRM) using APIMAC_GENERIC_ETSI_LRM_863_PHY_131, do we still have the same 34 channels? The documentation here was not so clear about this.
  3. Our use case is in agriculture with line of sight between the collector and the sensor in open fields, and we want to range test how far we can really operate the system. Are there any recommendations for the frequency configuration to work with 15.4 stack?

Thanks

John

  • 0
    TI__Mastermind 36375 points

    John,

    What country are you looking at deploying in?

    1. Given the APIMAC_STD_ETSI_863_PHY_3 splits into 34 channels and given the above channels, I should be creating a mask for 0x19, 0x1A, 0x1B, 0x1D, 0x1E (CH 25, 26, 27, 29, 30). This means that frequency hopping will occur only between these channels. Is this the correct understanding?
      1. Yes, this is correct.
    2. If we enable long-range mode (LRM) using APIMAC_GENERIC_ETSI_LRM_863_PHY_131, do we still have the same 34 channels? The documentation here was not so clear about this.
      1. Yes, the channel configuration is the same between long range mode and 50kbps.
    3. Our use case is in agriculture with line of sight between the collector and the sensor in open fields, and we want to range test how far we can really operate the system. Are there any recommendations for the frequency configuration to work with 15.4 stack?
      1. No, check for local interferes and local propagation mode. (This could be done using SmartRF Studio in continues RX mode and checking for RSSI)

    Regards,
    /TA

  • 0 in reply to TA12012
    TI__Expert 4375 points
    Hey John,

    If you would like to maximize range, enable the CCFG_FORCE_VDDR_HH=1 predefined symbol (found in project properties->Build->Arm Compiler->Predefined Symbols).

    ~Brocklobsta
  • 0 in reply to TA12012
    Prodigy 60 points
    Thanks for your reply TA!

    We are using this in the Philippines and will be doing some range testing next week - using both continuous RX and also figuring out packet/bit error rates at different ranges.