• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 16 subscribers
  • Views 387 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.

CC1120 Rx Transparent

Oz Richter
Prodigy 40 points
Other Parts Discussed in Thread: CC1020, CC1120

Hi!

I work on integration of CC1120 to a part of system that  based on CC1020.

I work in transparent mode but when i in receive mode i get a lot of noise on the data stream and it's cause a lot of error.

anyone have a solution for this problem?

my system parameters is:

CC1020 parameters :
X-tal frequency: 14.745600 MHz Internal
X-tal accuracy: +/-  3 ppm
RF frequency A: 915.000000 MHz Active   Rx
RF frequency B: 915.000000 MHz Inactive Tx
Frequency separation: 16.200 kHz
Data rate: 9.600 kBaud
Data Format: UART  Accurate
RF output power: 5 dBm
Channel width: 100 kHz
Modulation: FSK   Dithering enabled
Lock: Continuous
Carrier sense offset:   0 dBm DCLK squelch disabled
Operator Mode: Rx

CC1120 parameters :
X-tal frequency: 32 MHz  
Carrier frequency: 915.000000 MHz 
Deviation: 7.995605 kHz
Data rate: 9.599999 kBaud
Tx power: 10 dBm
RX Filter BW: 40 kHz
Modulation format: 2-FSK   

 

  • 0
    TI__Guru**** 317180 points

    Hi,

    you don't specify the nature of the noise but I assume it could be related to this: There will always be some 'jitter' on the output datastream in transparent mode because the input is not in sync with the internal clock and hence it will be a finite resolution on the output given by the internal clock rate. Hence the datastream should be oversampled by the micro controller that uses it.

  • 0 in reply to TER
    Prodigy 40 points

    Thanks for the support!

    he micro controller get the data stream by uart, can you explain me how to fix this data?

    Oz.