• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 54 subscribers
  • Views 241 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.

CC1101 Receiving problem.

Itay Kalfa
Prodigy 240 points
Other Parts Discussed in Thread: CC1101

Hi all

 

We’re using CC1101 and we have problem with the receiving range.

 

We did all the matching that needed to do and we can transmit up to 300 meter, but in the receive we barley reach 100 meter.

 

 

Can someone please advice what we need to do in order to receive from more distance.

 

[Some details: Antenna length = lambda/2 , from the end of the balun to the antenna we see 50 ohm ~ ]

Thanks a lot 

 

  • 0
    TI__Guru**** 317180 points

    When you manage to transmit 300 m, what do you use as receiver and the other way, when you say 100 m, what is your sender and receiver?

    Which datarate, deviation, modulation do you use? Which frequency band?

    It would be usefull to see a schematic, at least for the part from the RF_P/RF_N pins to the antenna.

    Do you use a VNA to measure the impedance? Could you post a plot showing S11?

  • 0
    TI__Mastermind 39860 points

    You need to test TX, RX and antenna performance separately before you set up an RF link. 

    TX: What is the conducted output power. Solder a semi-rigid coax cable to the board and disconnect the antenna. Measure using a spectrum analyzer

    RX: What is the conducted sensitivity? Use an RF signal generator to do the measurement. See www.ti.com/lit/swra097 for ways to measure sensitivity

    Antenna performance: Measure S11 and resonance frequency using a network analyzer.

    Also, check the register settings. If you post the settings here we can do a review