ati hdtv wonder Quick Setup Guide

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22  Channel List
When you first start DTV, the DTV Channels Initialization Wizard will 
guide you through setting up channel numbering. You can use two-part 
channel numbers (the default) or one-part channel numbers. 
L
DTV channels consist of a major and minor channel number — for 
example, 10.22. 
You can enter two-part channel numbers as a single number (for 
example, 9999) or with a delimiter (for example, 99.99). 
You can also enter a major channel number without a minor channel 
number — DTV will go to the first available minor channel that matches 
the major channel.
Did Autoscan find no digital TV channels?
Ensure that both ends of the antenna cable are securely attached.
Move the antenna to a different location.
Try a different UHF HDTV antenna — an outdoor UHF antenna may provide 
better results.