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DS90UB913A-Q1: Not use power over coax

Part Number: DS90UB913A-Q1

Tool/software:

Hi All,

I have a question about the DS90UB913A EVM.
www.ti.com/.../snlu135b.pdf

If I'm not using power over coax, is it okay to design it by deleting the part in the red box below?
Also, R80's 49.9 Ω is only implemented for DOUT-, but is it also necessary for DOUT+?
Is R80 only necessary when using power over coax?

Best Regards,
Ishiwata