Hitachi 55HDX61A Operating Manual page 8

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 ANT A (75-Ohm) terminal. If you
have a second antenna, connect the coaxial cable to the ANT B
terminal.
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.
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.
ANTENNA CONNECTIONS TO REAR PANEL JACKS
ANT B
To second antenna
ANT B
To UHF
antenna ANT A
Antenna Mixer
8
To outdoor antenna
ANT A
or CATV cable
To outdoor VHF
or UHF antenna
To outdoor antenna
or CATV system