Vivitek RP56HD21-A - Manual (Page 27)

Using Coaxial (RF)
To connect your VCR using coaxial (RF) audio and video :
1 Connect the “output to TV” (RF out or Antenna out) jack on the back of your
VCR to the TV/CABLE IN jack on the back of your RPTV.
2 Select TV using the INPUT button on the front of your RPTV, then go to channel
3 or 4.
If you have an off-air antenna or cable box, connect your off-air antenna or cable TV
cable to the TV/CABLE IN connector on the back of your VCR.
Warning If an outdoor antenna or cable system is connected to your
RPTV, make sure that the antenna or cable system is correctly
grounded. For more information, see “Television antenna
connectors protection (for systems fitted with TV/cable TV tuner
cards)” on page 52.