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Does the TI Bluetooth chip emit on several Bluetooth channels SIMULTANEOUSLY?

Allen Engel
Prodigy 50 points

For example, can a TI Bluetooth chip emit on Bluetooth Channel 1, Channel 2, 3, and 4 simultaneously, all at the same moment?

Likewise can a TI Bluetooth chip emit on 10 Bluetooth Channels simultaneously?

Or does the Bluetooth stack prevent the chip from doing so?

Thanks!   Allen

  • 0
    TI__Guru** 105180 points
    Hello Allen,

    No, this is not how the Bluetooth specification is defined/implemented. I suggest reviewing our pinned BLE FAQ & Getting Started post here in the BLE forum, specifically this topic "Q: Where do I learn more about the Bluetooth low energy specification, profiles, Notifications, Pairing, etc?"

    Best wishes
  • 0 in reply to JXS
    Prodigy 50 points
    Hi Thanks so much for your generous sharing of your knowledge. I do appreciate it.
    But No is a pretty terse answer and has not enlightened me much. In addition, I have read multiple instances wherein advertising occurs on all 3 advertising channels 37, 38, 39, which I inferred at being simultaneous. Likewise one of my dongles UI states that it broadcasts on channels 37, 38, 39. I can also run my dongles in RX mode, and I will attempt to determine it.
    I know that everyone is quite busy these days, but could you provide some specific references that describe that the chips emit radiation on one channel only at a time? Thanks Allen
  • 0 in reply to Allen Engel
    TI__Genius 10955 points
    In the Bluetooth core specification v5.0, you will find the following sentence in Vol 6, Part B, Section 1.4 (Page 2560):
    "The Link Layer uses one physical channel at a given time."

    When it says that advertising occurs on all 3 channels, this thus means that the link layer will use the channels in turn. This is for example illustrated in Vol 6, Part B, Figure 4.7 on Page 2614.
  • 0 in reply to hec
    TI__Guru** 106705 points
    Furthermore the radio itself can only tune to one frequency at a time, thus physically preventing it from transmitting at multiple channels simultaneously. This is true for any similar wireless microcontroller.

    Cheers,
    Fredrik