Patent ID: 6628930
Filing Date: 2003-09-30
Classification: H03J,H04B,H04H

Abstract:
A radio receiver, comprising:a circuit for checking a quality of reception at an alternative frequency to a received transmit frequency; a first signal processing branch; a first tuner connected to the first signal processing branch and for converting a received signal to a first intermediate frequency; a second signal processing branch; a second tuner connected to the second signal processing branch and for converting the received signal to a second intermediate frequency that is different than the first intermediate frequency; an intermediate frequency stage including an analog-digital converter operating at a sampling frequency; an intermediate frequency filter connected to the analog-digital converter, a demodulator connected to the analog-digital converter; a test unit connected to the analog-digital converter and for determining a signal quality; and a switch positioned upstream from the analog-digital converter and for optionally forwarding the received signal from the first signal processing branch and from the second signal processing branch, wherein: the first intermediate frequency and the second intermediate frequency meet the condition f0=(n+R)fa, f0 corresponds to a respective one of the first intermediate frequency and the second intermediate frequency, fa is the sampling frequency, n is a positive, whole number, and 0&lE;R&lE;1 applies.