Patent ID: 6693587
Filing Date: 2004-02-17
Classification: H01Q,H04H

Abstract:
A system for positioning a dish antenna having a plurality of low noise block converters (LNB's) for the simultaneous reception of signals from a plurality of satellites in a direct broadcast satellite system comprising:an integrated receiver/decoder (IRD) for powering a first LNB corresponding to a first satellite and a second LNB corresponding to a second satellite, where said first and second LNB's and said first and second satellites correspond to the extreme limits of the satellites in the plurality of satellites, the IRD toggling the power to the first and second LNB's; a first peak detector for comparing sample signals from the first LNB to determine a first threshold value; a first peak indicator being activated upon the first sample signal meeting the first threshold value; a second peak detector for comparing sample signals from the second LNB to a determine a second threshold value; a second peak indicator being activated upon the second sample signal meeting the second threshold value; means for measuring an instantaneous signal value for the first LNB upon determination of the second threshold value; means for calculating a dynamic peak threshold value from the first and second threshold values; means for monitoring the current signal value for the first LNB, whereby the antenna is moved until the current signal value for the first LNB is equal to the dynamic peak threshold value; and a master lock indicator for indicating a master lock when said dynamic peak threshold value is met.