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DS280DF810EVM: Question on DS280DF810EVM Error Counter in SigCon

Chenxuan Cui
Prodigy 70 points
Part Number: DS280DF810EVM


Tool/software:

Hi,

I am using SigCon with the DS280DF810EVM and noticed that the Error Count register is only 11 bits wide, counting up to 2048. Is there an auto-clear or accumulate function that would allow me to collect a larger number of error counts?

I am plotting TX power versus error count and would like to accumulate more errors for my analysis. Could you advise if there is a way to extend or accumulate beyond the current 2048 limit?

Thanks!

  • 0
    TI__Expert 5770 points

    Hi Chenxuan,

     The pattern checker functionality of the device does not support continuous operation and updating of the total bit errors. In order to read out the bit and error counters, the pattern checker must first be frozen. A bit error count of 2048 is high, is there a reason why there is so much error in your testing?

    Best regards,

    Greg

  • 0 in reply to Gregory Kobyakov
    Prodigy 70 points

    Hi Greg,

    I am doing RX sensitivity waterfall test, I setup attenuation from small to large, to check the error rate, until the CDR gets unlocked. That's why there are so many error bits. Is there a way I can reset the bit error counter before or when it reaches 2048? Or is there other way I can accumulate the error bits ? 

    Thanks! 

  • 0 in reply to Chenxuan Cui
    TI__Expert 5770 points

    Hi Chenxuan,

    The bit error count can be reset by first setting bit 6 of channel register 0x82 to 1 and then clearing the bit to restart the count. As the error count is only 11 bits wide, the device itself cannot accumulate a count higher than 2047. These writes, as well as the writes needed to re-load the PRBS checker's automatic pattern detection are described further in section 7.26 and 7.27 of the device programming guide.

    Best regards,

    Greg