Arrangement for converting TV intermediate frequency signals has single-stage analogue mixer whose output spectral component is between 0 and digital processing sampling frequency

摘要

The arrangement has a single-stage analogue mixer (4) that receives the intermediate signal at a first intermediate frequency and whose carrier frequency is selected so the desired spectral component of the mixed output signal lies between 0 and the spectral component digital processing sampling frequency, a low pass filter (5) for suppressing unwanted products of the analogue mixer and an output ADC (6) operated at the sampling frequency.