MMWCAS-DSP-EVM: Why the connection between the DSP board and my laptop became unstable?

chenyu zhang

Part Number: MMWCAS-DSP-EVM
Other Parts Discussed in Thread: MMWCAS-RF-EVM

Dear Ti Supporter:

I had a MMWCAS-DSP-EVM used for MMWCAS-RF-EVM, and they were used in my experiment in the past several weeks. However, the DSP could not work properly recently. The connection between the DSP board and my laptop became unstable, and it always disconnected during data collecting and data transferring process; meanwhile, the indicator light of WLAN connection port in DSP board would turn off.

I have tried every possible solution posted in the manual and on the Ti forum, but none of them worked. Therefore, would you please provide me any solution to this problem, or should I mail the board back for repairment?

Thank you very much! I am looking forward to your response.

over 3 years ago

0 Cesar over 3 years ago

TI__Guru*** 147954 points

Hi,

Have you tried with a different PC?

How long is your capture time?

Please check with your supplier the warranty information.

Thank you

Cesar

0 chenyu zhang over 3 years ago in reply to Cesar

Prodigy 50 points

Hi，

Yes，we tried different PC，but it did't work.

Our capture time is 20000ms, and we set the frames as 1200, the Inter_Frame_Interval is 100ms.

What can we do to solve this problem?

Whether this board can be returned or not in this situation?

Thanks for your help!

chenyu

0 Cesar over 3 years ago in reply to chenyu zhang

TI__Guru*** 147954 points

Can you try to increase the frame duration to check if behavior is different?

Thank you

Cesar

0 chenyu zhang over 3 years ago in reply to Cesar

Prodigy 50 points

I tried to connect it now, but it can't connect. This is another problem, it can not connect to my PC at the very begenning of the step.

We need to wait for a while. And could you please tell me how to do when this situation happen?

Thank you!

0 chenyu zhang over 3 years ago in reply to Cesar

Prodigy 50 points

Hi，

Finally, we connect it successful, it is very uncertain to connect successfully.

We changed the frame duration to 500ms, it can capture data, but it disconnected with a light tougch.

You know if we need to capture data, it is necessay to move during the capture.

What should we do if this condition can not be alleviated?

Does it mean we should return it?

Thanks!

chenyu

0 Cesar over 3 years ago in reply to chenyu zhang

TI__Guru*** 147954 points

Please give us some more time to check with hw team

thank you

Cesar

0 Ishita Kochar over 3 years ago in reply to Cesar

TI__Mastermind 31680 points

Hello Chenyu,

Are the connections and the wires a little loose to the setup? This can happen because of wear and tear as well. How long have you been using the board?

Please try to use a ethernet cable which is relatively new and in a good condition.

I'm suspecting loose connections to the problem.

Regards,

Ishita

0 chenyu zhang over 3 years ago in reply to Ishita Kochar

Prodigy 50 points

Hi Ishita,

We also think is the same problem. The network port interface is loosen. We have been using this board for less than two months.

We tried to change the cable which can work well in other board, but it can't work normally when connected to this board. It remains unstable.

Thanks for your answer.

Regards,

Chenyu

0 Ishita Kochar over 3 years ago in reply to chenyu zhang

TI__Mastermind 31680 points

Hello Chenyu,

Is it possible at your end to check the connections of the ethernet port to the MMWCAS-DSP-Board? Maybe the assembly was not proper.

If this is not possible, please raise a request for exchange.

Regards,

Ishita

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MMWCAS-DSP-EVM: Why the connection between the DSP board and my laptop became unstable?