DS160PR410EVM-SMA: schematic check

GARETH OU

Mastermind 9675 points

Part Number: DS160PR410EVM-SMA
Other Parts Discussed in Thread: DS160PR410

Tool/software:

DS160PR410EVM-SMA Evaluation Module (EVM) (Rev. B)

customer has a question. I see that the line requires a re-driver for both TX and RX.

customer oscilloscope measurement number can determine the EQ and Gain settings for TX.

How do we determine the EQ and Gain settings for RX?

Or should it be the same as the TX setup?

Thank you.

7 days ago

0 Nasser Mohammadi 7 days ago

TI__Guru* 92880 points

Hi Gareth,

It is the same TX setup. DS160PR410 does not know whether the channel is used for either RX or TX. We can use scope measurement for both TX and RX.

Regards, Nasser

0 GARETH OU 6 days ago in reply to Nasser Mohammadi

Mastermind 9675 points

Hi Nasser

Thank you for your explanation

The customer's oscilloscope can only power TX. Do you have any suggestions for RX?

0 Nasser Mohammadi 6 days ago in reply to GARETH OU

TI__Guru* 92880 points

Hi Gareth,

Please send us a picture or block diagram of the setup so we can see your customer options to make this measurement.

Regards,Nasser

0 GARETH OU 3 days ago in reply to Nasser Mohammadi

Mastermind 9675 points

Hi Nasser

As shown in the picture below, it is the same motherboard + base plate design. The re-driver will be placed on the base plate. Is there any recommended length of Y? If X=5”, Y=2”, what is the recommended gain and EQ adjustment for TX/RX respectively? Thank you

0 Nasser Mohammadi 3 days ago in reply to GARETH OU

TI__Guru* 92880 points

Hi Gareth,

This depends on the insertion loss for X or Y. We should always start with EQ index of 0 and then increase one step at a time until we see eye diagram improving. As we increase EQ index, there will be a point where eye diagram gets degraded. At this point we should back off by or reduce EQ index by 2 steps.

Regards, Nasser

0 GARETH OU 18 hours ago in reply to Nasser Mohammadi

Mastermind 9675 points

Hi Nasser

How about RX if We can’t measure RX signal SI?

0 David (ASIC) Liu 11 hours ago in reply to GARETH OU

TI__Guru**** 153401 points

Hi Gareth

Due to the US Labor Day holiday, the response to your question may be delayed. We will look into your question when we return tomorrow, Sept 3rd. Sorry for the wait and any inconvenience it may cause.

Thanks,

David

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DS160PR410EVM-SMA: schematic check