Patent ID: 7805118
Filing Date: 2010-09-28
Classification: H03J,H04B,H04L

Abstract:
1. A method for adjusting a receiving system in a satellite receiving installation, the method comprising: receiving, at an input of a receiving system, an external signal at a satellite frequency; generating, with a first oscillator, a first transposition signal at an oscillation frequency having a theoretical value and a real value different from the theoretical value; mixing the external signal and the first transposition signal with a first frequency mixer having a first input coupled to the input of the system, a second input receiving the first transposition signal, and an output delivering a first intermediate signal at a first intermediate frequency; generating, with a second oscillator, a second transposition signal at an oscillation frequency having a nominal value; mixing the first intermediate signal and the second transposition signal at a second frequency mixer having a first input coupled to the output of the first mixer for receiving the first intermediate signal, a second input receiving the second transposition signal, and an output delivering a signal at a second intermediate frequency; and controlling, with a microcontroller and with signals generated by only two oscillators, a real value of the oscillation frequency of the second transposition signal by: