Post Go back to editing

Question about the balun of the AD9250-250EBZ input circuit

Category: Hardware
Product Number: AD9250-250EBZ
Software Version: .

The circuit below has T103 and T100.

The T103 is a 50 ohm balun, and the T100 is a 75 ohm balun.

I wonder why they used different baluns.
Also, why is the actually inserted balun a 75 ohm balun?

Thank you