Tough question:
There used to be switches for HRC cable and NTSC. Without the HRC set, you would not get good reception from, I think, channel 7 to 13 VHF. All the high numbered UHF stations would also be missing. If you switched to the HRC mode, then you would receive NTSC unscrambled cable channels.
Now things are harder. A TV needs to include a QAM tuner to receive HD cable channels over the cable network. Still some would be missing such as scrambled ones. Not all TV's include such a tuner.
QAM tuner - Wikipedia, the free encyclopedia
ATSC tuners allow one to receive digital off the air stations.
Remember that your TV may have been needed to be re-scanned after the cable company made any changes.
Now, that really leaves a few options:
1.rent a cable box. Usually it can convert the digital stuff to analog.
2. purchase a new TV with a QAM tuner. (find out what TV your roomate has and post the link of the manual.
3. Purchase a QAM tuner.
4. Find a box.
5.Purchase a PC TV tuner card. Use the outputs or view directly on the PC or laptop.
DTV converter boxes from the governement won't work for cable.
You could have issues with the TV distribution to your outlet.
Your turn