Mitsubishi CS-40505 Owner's Manual page 53

<using your remote control to operate your cable box;.
After you have set up your remote contrc,1 for your particular brand
of cable box, you can use the re:mote to operate your cable box.
O Choose the layer using a select button on the remote control:
SELECT, VCR-A, or VCR-B.
O Point the remote control at the cable box and press the desired
buttons.
Only the POWER and CHANNEL buttons can be used[ when oper-
ating your cable box.
Getting Started 51