• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 30 subscribers
  • Views 3223 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.

AWR1642: About setting Tx output power back-off code for tx antennas

lin duan
Prodigy 155 points
Part Number: AWR1642

Hello,

I have some issue as my title.

i find the power of two Tx antennas cannot be changed at the same time.please look the fft graph below:

i had changed the back-off code of Tx to 30, i think it means both Tx1 and Tx2 should be reduced 30dB at the same time,

but the changing only show at channels of Tx2. Levels of Rx5-Rx8 are lower than max power 30dB,but Rx1-Rx4 not changed.

My configfile is below:

-------------------------------------------------------------------------------------------------------------

sensorStop
flushCfg
dfeDataOutputMode 1
channelCfg 15 3 0
adcCfg 2 1
adcbufCfg 0 0 1 1
profileCfg 0 77 7 7 58 30 0 68 1 128 2750 0 0 30
chirpCfg 0 0 0 0 0 0 0 1
chirpCfg 1 1 0 0 0 0 0 2
frameCfg 0 1 32 0 400 1 0
lowPower 0 0
guiMonitor 1 1 1 1 1 1
cfarCfg 0 0 8 4 4 0 5120
cfarCfg 1 0 4 2 3 0 5120
peakGrouping 1 1 1 1 255
multiObjBeamForming 1 0.5
calibDcRangeSig 0 0 20 32
sensorStart

-------------------------------------------------------------------------------------------------------------

Is there something wrong? Please tell me the way to change the power of two Tx at the same time.

Best Regards;

Duan

  • 0
    TI__Guru 50240 points
    Hello Duan,

    This is an interesting question. I will have to talk to my team and get back to you.


    Cheers,
    Akash
  • 0 in reply to Akash Gondalia
    Prodigy 155 points

    Hello Akash,

    Thanks and waiting for your for your reply .

    Best Regards,

    Duan

  • 0 in reply to lin duan
    TI__Expert 4720 points

    Hi Duan,

    The 'tx power back off option' is a per-tx option. The format of the tx power back off code is given in page 52 (as part of the ProfileCfg message) in the 'radar interface control document'. You can find the same in the DFP package in the directory 'ti\mmwave_dfp_00_07_00_03\docs' . I have snipped off the relevant bits and placed a screenshot here. Let me know if this helps. 

    Regards

    Anil

  • 0 in reply to Anil Mani
    Prodigy 155 points

    Hello Anil,

    Thanks for your reply! It's very helped to me.

    I try to changed my configration file like below:

    ---------------------------------------------------------------------------------

    sensorStop
    flushCfg
    dfeDataOutputMode 1
    channelCfg 15 3 0
    adcCfg 2 1
    adcbufCfg 0 0 1 1
    profileCfg 0 77 7 7 58 7710 0 68 1 128 2750 0 0 30
    ..........

    -------------------------------------------------------------------------

    the power of Tx1 and Tx2 are reduced 30dB from the maximum power!

    Thank you!

    Duan