Samsung HPP5581X-XAA - Manual (Page 22)

Connecting VHF and UHF Antennas
22
Antennas with 75-ohm Round Leads
If your antenna looks like this: it has 75-ohm round leads.
1 Plug the antenna lead into the ANT 2 IN(AIR IN)
on the PDP.
Use the antenna cable, an accessory included
in the product package.
Note
• When Antenna is set to AIR, ANT 1 IN(CABLE IN) signal will be the output from ANT1 OUT.
(See “Selecting the antenna.” on page 84.)