• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 53 subscribers
  • Views 196 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.

Original question:

CC1312R: Frequency deviation deviations

CC1312R: Frequency deviation deviations

TSUDA SHOGO
Prodigy 80 points
Part Number: CC1312R

Tool/software:

Sorry for the series of threads.

Regarding the frequency deviation, we recognise that the problem is that there is a frequency deviation between the L, M and H channels in the same frequency band, and we are not asking whether each channel meets the standard or not.

Essentially, the frequency deviation depends on the reference frequency of the oscillator etc. and is considered to be approximately equal at L, M and H. If the frequency deviation is different for L, M and H, it will be difficult to incorporate the frequency deviation into the product.

In case you are wondering, a TCXO was used as the reference clock and the frequency deviation was about +0.43 ppm.

Is there any solution to this?

regards.

  • 0
    TI__Mastermind 33100 points

    Hi,

    I still do not see the technical issue here that there is a slight change of the frequency offset that is approx 1-3 ppm for the complete 429 MHz band (previous post). 

    Which PHY are you using and the exact register settings ? 

    Are you concerned that the Rx bandwidth is not sufficient to handle a 1-3 ppm frequency offset ? 

    From the CC1312R7 datasheet, using the narrowband 9.6 kbps PHY as an example, the receiver can handle approx +/- 8 ppm frequency offset without any significant degrading of the sensitivity level.