Physical (2 & 3 digit), Virtual Cable (4-digit), Virtual OTA and Frequency for COX-SanDiego QAM Channels are listed here:
Physical, Virtual Cable, Virtual OTA and Frequency for TWC-SanDiego QAM Channels are listed here:
77.aaaa, 705 (69.1), 543 MHz
77.bbbb, 706 (6.1), 543 MHz
78.cccc, 707 (7.1), 549 MHz
78.dddd, 708 (8.1), 549 MHz
79.eeee, 709 (51.1), 555 MHz
79.gggg, 710 (10.1), 555 MHz
79.hhhh, 711 (11.1), 555 MHz
Decimal values in QAM Channel Numbers varies, depending on how the user equipment determines this value.....
On CATV systems, FOUR digit CABLE Channel numbers are ALWAYS Virtual numbers, which can be arbitrarily assigned by the cable company (on TWC-SD they are 1, 2, 3 & 4 digits). For those systems still broadcasting an Extended Analog Tier (typically up thru about Ch70-80), Digital QAM Channel numbers within Analog Tier are studiously avoided, since they result in a "blank" or snowy/noise channel when tuning through the Analog Tier. Hence Digital QAM Channel numbers (plus perhaps one to four decimals indicating a sub-channel number) usually start as two digit numbers in the 70's, 80's and 90's plus 100's up to about QAM Ch124, with a 50 MHz protection gap before MOCA at 850-1500 MHz (usually):
BTW: I would like to see the Cable companies assign the SAME Virtual Channel Number to the HD Tier as they do to the Analog Tier (e.g. Ch5 thru 11). Since it's an arbitrary Virtual number assigned by the cable company, look up tables in HD STB's could be easily reprogrammed to do this. If a rare HD-STB user wanted to tune to the SD version of the OTA HD Channel, let THEM use a four digit Virtual Channel number. And SD STB's would still enter Ch5-11, with THEIR internal look-up table set-up to pick the SD version on the appropriate shared QAM channel.