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CC2674R10: Bluetooth SIG Qualification Questions

Part Number: CC2674R10

Tool/software:

I'm working with a customer, who in turn is working with a test house that has raised some questions about the qualification of their product based on our device:

As discussed earlier today, I created the test plan for RF-PHY testing with transmitter, receiver and Power class 1 features. See attached test plan.

However, it appears the Host design may not be compatible with RF-PHY chip, there are two inconsistencies/Inter layer dependencies triggered between Link Layer and RF-PHY layer as highlighted below:

  • TI Host QDID (196584 – based on CC2674R10) does not support power class 1 in Link Layer, while you are planning to support on the product, this led to the ILD: To resolve this, you either need to drop power class 1 in RF-PHY layer or get an alternative QDID from TI with Link Layer supporting power class 1.
  • TI Host QDID supports LL 9/15 “Connection CTE response” feature which is tied to “Transmitting constant tone extensions” that’s  not supported in RF-PHY layer, this led to another ILD: To resolve this ILD, you either need to support RF-PHY 1/8 “Transmitting constant tone extensions” feature or have TI create a subset to exclude LL 9/15 feature (This does not involve any cost, it can be simply done from their Bluetooth SIG account)

The GATT ILD has it’s waiver from SIG . The other ILDs must be resolved before we can submit the listing to Bluetooth SIG.

This is a bit beyond my level of expertise, and I'm not really sure what "Power Class 1" means. The customer design utilizes our CC2674R10 with an external RF power amplifier. I believe the resulting output power is in the range of ~20dBm to ~22dBm. I'm not sure if that is relevant or not.

Customer is asking TI:

  • get an alternative QDID from TI with Link Layer supporting power class 1
  • have TI create a subset to exclude LL 9/15 feature (This does not involve any cost, it can be simply done from their Bluetooth SIG account)

Assuming this is the correct way to proceed, is this something we are able to do?

Thanks,

Stuart

  • Hi Stuart, 

    Thank you for reaching out. 

    TI Host QDID supports LL 9/15 “Connection CTE response” feature which is tied to “Transmitting constant tone extensions” that’s  not supported in RF-PHY layer, this led to another ILD: To resolve this ILD, you either need to support RF-PHY 1/8 “Transmitting constant tone extensions” feature or have TI create a subset to exclude LL 9/15 feature (This does not involve any cost, it can be simply done from their Bluetooth SIG account)

    - As of today Power Class 1 is not supported by the BLE5Stack. I am reviewing our options, but for now, I believe the only path forward is actually to remove this feature from the feature list. This means the maximum TxPower usable will be 10mW (+10 dBm) - cf. BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part A 

    TI Host QDID supports LL 9/15 “Connection CTE response” feature which is tied to “Transmitting constant tone extensions” that’s  not supported in RF-PHY layer, this led to another ILD: To resolve this ILD, you either need to support RF-PHY 1/8 “Transmitting constant tone extensions” feature or have TI create a subset to exclude LL 9/15 feature (This does not involve any cost, it can be simply done from their Bluetooth SIG account)

    - I am working to get the subset required created. Will let you know when I get some more details on the timeline (for reference, last time we did this it took 2 weeks)

    Best regards, 

  • Hi Stuart, 

    I believe the resulting output power is in the range of ~20dBm to ~22dBm

    One more element, in all the cases, Bluetooth LE specifications do not allow more than 20 dBm. Probably an element to clarify here. 

    For reference on Bluetooth Power modes: BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 6, Part A, §3

    I'll continue the investigations assuming the TxPower is 20dBm. 

    Best regards, 

  • Clement,

    I was able to confirm the customer target is +20dBm.

    Thanks,

    Stuart

  • Hi Stuart, 

    Thank you for telling me. 

    Please bear with us. 

    Regards,