DS90UB933-Q1: when cable from 0.5m to 6.5m, the screen flickers

Hello Amelie,

Can you please check if the longer cable length is meeting the channel requirements?

You can use the margin analysis tool (MAP) in ALP to check link health. Here are two app notes that have more information about the MAP tool: 

https://www.ti.com/lit/pdf/snla301 and https://www.ti.com/lit/pdf/snlu243 

what kind of cable and connector are you using? What are the cable characteristics?

The receiver incorporates an adaptive equalizer (AEQ), which continuously monitors cable characteristics for long-term cable aging and temperature
changes. The AEQ attempts to optimize the equalization setting of the RX receiver.

Best Regards,

Shruti

Hi Shruti, 

AEQ is open automatically, right? No need to adjust regsiter?

Hello Amelie,

Yes, AEQ starts up automatically. There is no register to adjust the 933/934.

Best,

Shruti