DLPNIRNANOEVM: Spikes in spectrum

Jose Jimenez-Berni

Part Number: DLPNIRNANOEVM
Other Parts Discussed in Thread: DLPC150

I have been using the module for a while, and without any apparent reason, I am getting spikes in the readings, apparently at regular intervals.

Any clue? Could it indicate some mirror damage? Does anyone have similar issues?

Thank you in advance!

over 1 year ago

0 Vivek Thakur over 1 year ago

TI__Mastermind 22830 points

Hello Jose,

Welcome to DLP forum and thank you for your interest in DLP technology.

Could you please upload the CSV file with all scanned data? This will help me analyze the issue.

regards,

Vivek

0 Jose Jimenez-Berni over 1 year ago in reply to Vivek Thakur

Prodigy 10 points

Dear Vivek,

Thank you for your quick reply and congratulations for making such an amazing product!

You can download the CSV and DAT files here:

https://saco.csic.es/index.php/s/SzNxZs3JPC36Ter

Looking forward to hearing insights on the issue.

0 Vivek Thakur over 1 year ago in reply to Jose Jimenez-Berni

TI__Mastermind 22830 points

Hello Jose,

Thank you for uploading the file. You would have noticed that every 24th line is the CSV file has very low or negative value. It is very likely that one of the data pin is loose or not connected.

Please take out the two EE boards from EVM by opening the stand. Please check if any of the pin in the connector is bent or loose. Assemble them back and ensure that connectors are properly connected.

Hopefully this should resolve the issue.

Could you please do me a favor? Please take scan using Hadamard configuration (before trying a fix) and upload the CSV file. I would like to compare scan in these two configurations.

regards,

Vivek

0 Jose Jimenez-Berni over 1 year ago in reply to Vivek Thakur

Prodigy 10 points

Hello Vivek,

Actually, I did a scan using Hadamard mode (still trying to get my head around it). It is uploaded in the same folder.

Thank you for the hint. I will try that tomorrow morning and check the boards. Sounds like a very plausible explanation. I will let you know.

Regards,

Jose

0 John McKnight over 1 year ago in reply to Jose Jimenez-Berni

TI__Expert 5300 points

Hello Jose,

We look forward to your feedback. Thank you for your patience.

Regards,

John

0 Vivek Thakur over 1 year ago in reply to John McKnight

TI__Mastermind 22830 points

Hello Jose,

Did your issue get resolved?

regards,

Vivek

0 Jose Jimenez-Berni over 1 year ago in reply to Vivek Thakur

Prodigy 10 points

Dear Vivek and John. Sorry for taking so long. It took me a while to get back to the lab a find time to put things apart. I took out the boards and inspected the pins in the connectors. I couldn't see anything wrong. Everything looks good and clean. I put everything back and tried again. Same result.

Can you suggest any other 'electrical' test that I can do to find out any damaged connection?

Thank you for your time and patience!