TMDS181: TMDS181 can't pass the Jitter test

Vincent Hsieh

Expert 1895 points

Part Number: TMDS181

Dear Sir,

We use the TMDS181 to do the cable, but it can't pass the Jitter test

Could you let me know which register can Improve it?

The attached file is TDR test.

2.0.zip

over 7 years ago

0 Francisco Javier Zamudio over 7 years ago

TI__Expert 5455 points

Hello Vincent

Can you share more details regarding the application? if possible, please share the schematic.

Regards
Francisco

0 Vincent Hsieh over 7 years ago in reply to Francisco Javier Zamudio

Expert 1895 points

Dear Sir,

The attached file for your reference.

TMDS181.pdf 6371.TMDS181.pptx

0 Vincent Hsieh over 7 years ago in reply to Vincent Hsieh

Expert 1895 points

Dear Sir,

We send the 4K*2K/60Hz for jitter test.
Connect to TV board is pass directly, if the Jitter testing signal is transformed to the TV board via timds181, it no picture is displayed.

0 Francisco Javier Zamudio over 7 years ago in reply to Vincent Hsieh

TI__Expert 5455 points

Hello Vicent

I took a quick look at your schematic but the value components are not clear to me. For example bypass capacitors and OE capacitor values are not clear to me. Resistors at CTL pins have extra resistors that shouldn't be there. Can you tell me what are the DH3 and DH5? Also RH23, 21, 22, 28, 30.

I've attached a check list that can help you, please, take a look at it and after that send me again your schematic to perform a double check.

Regards

Francisco

tmds181Checklist.xlsx

Interface

Interface forum

TMDS181: TMDS181 can't pass the Jitter test