Frequencies
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1. Digital cable - Wikipedia, the free encyclopedia
Digital cable channels typically are allocated above 552 MHz, the upper frequency of cable channel 78. (Cable channels above channel 13 are at lower frequencies than UHF broadcast channels with the same number, as seen in North American cable television frequencies.) Between 552 and 750 MHz, there is space for 33 6-MHz channels (231–396 SDTV channels); when going all the way to 864 MHz, there is space for 52 6-MHz channels (364–624 SDTV channels).
In the U.S., digital cable systems with 750 MHz or greater activated channel capacity are required to comply with a set of SCTE and CEA standards, and to provide CableCARDs to customers that request them.
2. Cable-Modems.org : Tutorial : Terms
Downstream frequency: The frequency used for transmitting data from the CMTS to the cable modem. Normally in the 42/65-850 MHz range depending on the actual cable plant capabilities.
Upstream frequency: The frequency used to transmit data from the CM to the CMTS. Normally in the 5-42 MHz range for US systems and 5-65 MHz for European systems.
This is about as good as it gets. The actual frequencies are dependent on your cable system's specific configuration.
and a lot of that information will change as companies start getting rid of analog lineup and moving more stuff to digital. On our system we use about 10 channels that are in that 2-78 range for Digital channels and not analog stuff.
