• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 54 subscribers
  • Views 245 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.

LPSTK-CC1352R: What is the meaning of absTime in the EasyLink Rx Packet?

Alan DeMars
Prodigy 50 points
Part Number: LPSTK-CC1352R

Does the "absTime" field within a received packet indicate the time at the beginning or the end of the received packet?

Also, is there a way to know the length of a packet in RAT time units?

Alan

  • 0
    TI__Mastermind 20407 points

    Hi Alan, 

    It is the absolute time at which the RX is turned on, so that you receive a packet. It is the parameter used to schedule when the radio is turned on to receive the packet. 

    I see no parameter for that. But the duration required to receive the packet should be  very close to length of packet/data rate.

    Regards,

    Sid    

  • 0 in reply to Sid
    Prodigy 50 points

    Sid,

    My test results seem to indicate that the 'absTime' field in a received packet is the absolute time value that the packet was received relative to when the receiver was turned on. In my case, I enable the receiver and expect a packet to be received around 2ms later. The delta absolute time from when I enable the receiver and the value of 'absTime' in the received frame hovers around 8000 which I understand to be 2000us.

    If the baseband data rate is 50kbps and the transmitted packet length (packet header plus payload) is 53 bytes (424 bits), can I assume that the length of transmitted burst is 424/50000 around 8.48 ms? Or is there some kind of FEC encoding that stretches the burst size out?

    Alan