There are now 4 different major types of cable and a few secondary
The major
NTSC: This is the old Analog Television, once all systems were like this
QAM (With sub settings) This is regular Digital Cable.. NOT ALL TELEVISIONS have a QAM decoder.. In fact the one brand that is still made (Actually once again made in the USA) does not decode QAM..
NTSC.. Some cable systems. like the one I'm on, Simply pass on the signal they get from Over the Air locals.. Do not change it to QAM as many others do.
ENCRYPTED: you need a "Set Top Box" for these, no matter your TV.
I have 3 TV's here too. one, when set to cable, does all 3 of the non-encrypted formats, QAM, ATSC and NTSC.. One only does NTSC and ATSC when on "Antenna" and QAM (or NTSC) on Cable (Will not display the digital channels on the local cable) the other two do all 3 when on cable ATSC, NTSC and Qam.
Very confusing.. thankfully I figured 'em out.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times