How often does the set-top box manually upgrade the TV station?

If you have these channels on your cable, do a full channel search, pay attention to which frequencies are not found, and then search these frequencies manually. Or when you go to handle these businesses, just ask the frequency of manual search.

If they don't broadcast these channels, you won't get them anyway.

Unless you use a satellite receiver to watch the relevant satellite frequency. You can find the website of David parameters.