Hitachi 42HDF52A Operating Manual page 12

ANTENNA CONNECTIONS TO REAR PANEL JACKS
VHF (75-Ohm) antenna/CATV (Cable TV)
When using a 75-Ohm coaxial cable system, connect the outdoor antenna or CATV coaxial cable to the ANALOG RF terminal (75-Ohm)
and/or DIGITAL RF terminal (75-Ohm).
VHF (300-Ohm) antenna/UHF antenna
When using a 300-Ohm twin lead from an outdoor antenna, connect
the VHF or UHF antenna leads to screws of the VHF or UHF adapter.
Plug the adapter into the antenna terminal on the TV.
To outdoor VHF
When both VHF and UHF antennas are connected
Attach an optional antenna cable mixer to the TV antenna terminal,
and connect the cables to the antenna mixer. Consult your dealer or
service store for the antenna mixer.
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