JVC LT-19DM21 Guide D'utilisation page 14

Antenna connections
If you are using an indoor or outdoor antenna, follow the instructions below that correspond to your
antenna system. If you are using a Cable TV service, see page 15 for Cable TV connections.
Combination VHF/UHF Antenna (Single 75 ohm cable or 300 ohm twin-lead wire)
Antenna
Jack
75 ohm
Coaxial
Cable
Combination VHF/UHF Antenna (Separate VHF and UHF 300 ohm twin-lead wires)
Antenna
Jack
Combiner
UHF 300 ohm
300-75 ohm Matching Transformer
Separate VHF/UHF Antennas (75 ohm VHF cable and 300 ohm UHF twin-lead wires)
Antenna
Jack
Combiner
UHF 300 ohm
14
Antenna
Jack
300-75 ohm
Matching
Transformer
VHF 300 ohm
VHF 75 ohm
Connect the 75 ohm cable from the combination
VHF/UHF antenna to the antenna jack.
If your combination VHF/UHF antenna has a 300
ohm twin-lead wire, the use of the 300-75 ohm
matching transformer may be necessary.
Connect the UHF 300 ohm twin-lead wire to
the Combiner (not supplied). Connect the VHF
300 ohm twin-lead wire to the 300-75 ohm
Matching Transformer. Attach the Transformer to
the Combiner, then attach the Combiner to the
Antenna Jack.
Connect the VHF 75 ohm cable and UHF 300 ohm
twin-lead wire to the Combiner (not supplied).
Attach the Combiner to the Antenna Jack.