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US 8,528,025 B2Granted
Drift compensator for a tuning device
AssigneeEchoStar Technologies L.L.C.
InventorEdmund F. Petruzzelli
Life of this patent
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Abstract
An apparatus coupled to, or integrated with, a tuner. This apparatus, which may be referred to herein as a “compensator,” may operate to adjust a frequency of the tuner to counteract drift or error that may cause the tuner to erroneously tune to an inaccurate or undesired frequency. The compensator may be implemented as hardware or software, and may be stand-alone or integrated into the tuner and/or LNBF.
Claims12
An apparatus for compensating for drift in a satellite tuning device, comprising:
- a tuner configured to tune to a channel carried on a transponder signal;
- a compensator associated with the tuner, the compensator configured to:
- determine an offset value for the transponder signal;
- add the offset value to a center frequency;
- searching a frequency band around the center frequency within a deviation of a first size;
- the compensator further configured to execute the following actions in the event that the transponder signal is located within the frequency band at a perceived frequency:
- set the offset value to equal the difference between a standard frequency for the transponder signal and the perceived frequency;
- and
- store the offset value in an entry;
- and
- the compensator further configured to execute the following actions in the event that the transponder signal is not located within the frequency band at the perceived frequency:
- increment the size of the deviation such that the deviation is a of second size;
- search the frequency band around the center frequency within a deviation of the second size;
- locate the transponder signal within the frequency band at the perceived frequency;
- set the offset value to equal the difference between a standard frequency for the transponder signal and the perceived frequency;
- and
- store the offset value in an entry.
14 more elements
A apparatus for compensating for drift in a satellite tuning device, comprising:
- a tuner configured to tune to a channel carried on a transponder signal;
- a compensator associated with the tuner, the compensator configured to:
- search in a frequency band centered on a center frequency for a signal;
- in the event the signal is not located, increment the center frequency by a deviation value to yield an adjusted center frequency;
- search a second frequency band around the adjusted center frequency for the signal;
- locate the signal within the adjusted center frequency;
- set the deviation value to equal the difference between a standard frequency for the signal and a frequency at which the signal was located;
- and
- store the deviation value.
6 more elements
Dependencies are inferred from the claim text.