AWR1642: About Rx issue

Jasper Tsai

Prodigy 20 points

Part Number: AWR1642

When we disable the Tx channel, we still receive the objects with velocity at Rx side(Test in the chamber).

The test result as follows:

For more information:

1. We use the low cost PMIC solution(LM53625 + LP87524J), and already bypass the internal LDO .

2. The start frequency is setting at 76.5GHz, so the VCO_SEL changed to 0(76-78 GHz).

Do you have any idea?

Thanks.

Jasper

over 5 years ago

0 Cesar over 5 years ago

TI__Guru*** 149144 points

Hi,

We have to check with our characterization team and get back to you

thank you

Cesar

0 aozer over 5 years ago

TI__Mastermind 30775 points

Hello Jasper,

Can you let us know what the corresponding frequency of these objects is?

Regards,

Adrian

0 aozer over 5 years ago in reply to aozer

TI__Mastermind 30775 points

Hello Jasper,

Any update?

Regards,

Adrian

0 Jasper Tsai over 5 years ago in reply to aozer

Prodigy 20 points

Hi Adrian

Sorry for late response, I had a business trip last week.

You want to know if the corresponding frequency is 4 MHz or not, right?

The chirp parameters are setting as follows:

If you have any questions, please feel free let me know.

Thanks.

Jasper

0 aozer over 5 years ago in reply to Jasper Tsai

TI__Mastermind 30775 points

Hello Jasper,

Do they objects show up in the range profile FFT?

Is this a custom antenna? Perhaps there is some TX-RX coupling creating the ghost objects.

Regards,

Adrian

0 aozer over 5 years ago in reply to Jasper Tsai

TI__Mastermind 30775 points

Hello Jasper,

Any update?

Regards,

Adrian

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AWR1642: About Rx issue