• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 3 answers
  • Subscribers 54 subscribers
  • Views 1820 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

RTOS/CC1352P: CC1352P - OQPSK DSSS FCC 15.247 ETSI EN 300 440 and ETSI EN 300 220

TC A12
Prodigy 60 points
Part Number: CC1352P
Other Parts Discussed in Thread: CC1310

Tool/software: TI-RTOS

We are currently developing a solution which is based on CC1352P. Depending on the usecase our solution will communicate by using 802.15.4 (possible zigbee) – 2,4 Ghz, or 868/915 Mhz using “propmode” or 802.15.4 if available for sub-ghz.

Our solution is targeting the whole world. In order the comply with regulations we are looking at how the CC1352P fits the requirements by FCC, ETSI EN 300 440 and ETSI EN 300 220.

https://www.etsi.org/deliver/etsi_en/300400_300499/300440/02.01.01_30/en_300440v020101v.pdf

https://www.etsi.org/deliver/etsi_en/300200_300299/30022002/03.01.01_30/en_30022002v030101v.pdf

https://www.ecfr.gov/cgi-bin/text-idx?SID=c966b390f334c4cf73937ae06d3e3584&mc=true&tpl=/ecfrbrowse/Title47/47cfr15_main_02.tpl

(Paragraph 15.245, 15.247 and 15.249)

Does CC1352P have support for OQPSK DSSS on both sub Ghz and 2,4Ghz?

Which mechanisms does CC1352P and RTOS have built in to transmit with in the +1dBm to +20dBm (or as high as possible)range and still comply with FCC and ETSI using either “digital modulation”, “frequency hopping” or “duty cycling” (or other techniques/mechanisms described by the authorities/standards)?

These questions are relevant for both the 868 Mhz, 915 Mhz and 2,4Ghz bands

Does CC1352P have 802.15.4 support for sub-Ghz frequencies or is “prop-mode” our only option?

  • 0
    TI__Mastermind 36395 points
    TC A12,

    We are not planning on supporting the 2M chip/s 802.15.4 OQPSK at Sub1GHz, we are evaluating others.

    For now I would recommend the FSK modes of the 802.15.4 revision V specification and they are accessed thru the "prop-mode" interface.

    Regards,
    /TA
  • 0 in reply to TA12012
    Prodigy 60 points

    So - If we are using one of the following prop.mode settings CC1352P will comply with FCC using "digital modulation" and therefore can transmit with max 1 watt?

    Modes:
    ==================================================
    -50 kbps , 2-GFSK, 25 Khz deviation
    -50 kbps , 2-GFSK, 25 Khz deviation, IEE 802.15.g MR-FSK PHY mode
    -5 kbps, SimpleLink long range (20 kchip/s, 2-GFSK, conv. FEC r=1/2 K=6, DSSS SF=2 Tx dev:5Khz, RX BW;34 KHz)
    -2,5 kbps, SimpleLink long range (20 kchip/s, 2-GFSK, conv. FEC r=1/2 K=6, DSSS SF=4 Tx dev:5Khz, RX BW;34 KHz)

    ==================================================

    FCC - www.ecfr.gov/.../text-idx

    "Systems using digital modulation techniques may operate in the 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz bands. The minimum 6 dB bandwidth shall be at least 500 kHz."

    "For systems using digital modulation in the 902-928 MHz, 2400-2483.5 MHz, and 5725-5850 MHz bands: 1 Watt. As an alternative to a peak power measurement, compliance with the one Watt limit can be based on a measurement of the maximum conducted output power. Maximum Conducted Output Power is defined as the total transmit power delivered to all antennas and antenna elements averaged across all symbols in the signaling alphabet when the transmitter is operating at its maximum power control level. Power must be summed across all antennas and antenna elements. The average must not include any time intervals during which the transmitter is off or is transmitting at a reduced power level. If multiple modes of operation are possible (e.g., alternative modulation methods), the maximum conducted output power is the highest total transmit power occurring in any mode."

  • 0 in reply to TC A12
    TI__Mastermind 36395 points
    TC A12

    With the narrow ones we currently have released you will need frequency hopping, as this device is still in preview we are still working on more capabilities for the future releases. We release new SDK's every 3 months. For the older devices, CC1310, you can see we just released something called WBDSSS and this enables 500KHz wide modulation and still have good link budgets.

    For right now, the modes you listed is what we can do.

    Regards,
    /TA
  • 0 in reply to TA12012
    Prodigy 60 points
    Thank you for your reply.

    Maybe our interpretations of and references to the FCC and ETSI regulations just has brought confusion to this discussion. Our main question is:
    What is the maximum allowed output power we can use with CC1352P for 2,4Ghz and 868/915Mhz and still be compliant with FCC and ETSI regulations? Which settings and limitations do we have to consider when using CC1352P in our “max allowed output” scenario?

    Regards
    TC
  • 0 in reply to TC A12
    TI__Mastermind 36395 points
    TC A12,

    10dBm for ETSI and 20dBm for FCC regulations.

    Regards,
    /TA