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Message: <blockquote data-quote="Llew" data-source="post: 742495" data-attributes="member: 175007">Tuner/demodulator chipsets in some receivers can 'sweep' the tuning range of the satellite's spectrum and store all found channels in the box's database. It doesn't depend on the fixed channel list that the receiver has stored - it can find all channels available at the time of scanning, within the limits of the tuner's spec (minimum/maximum symbol rates, type of demodulation).It's also possible with some receivers to use software for blind scanning, but is usually much slower.Rare to find in a pci card - an early version of the Skystar card had hardware scanning.</blockquote>