Vivitek LCD-TV User Manual page 21

Scan Channels
The Scan Channels sub-menu automatically scans for available channels based upon the
source input selected. If scanning for OTA (over the air) channels, select Antenna as the
input source. If scanning for Cable channels, select Cable as the input source.
After selecting the input source, activate the Scan button to initiate scanning or cancel the
scan function by selecting Don't Scan.
When selecting Cable as the scan input source, a sub-menu will appear for selecting a
cable TV signal type. The signal type is determined by the cable provider. If unsure about
the proper signal type, use the "Automatic" option.
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