ABSTRACT
The formula can be rearranged to make fRF the
subject, as follows:
fRF = fLO ± fIF
In other words, there are two potential radio
frequency signals that can mix with the local
oscillator signal in order to provide the required
IF. One of these is the wanted signal (i.e. the
signal present on the channel to which the
receiver is tuned) whilst the other is referred to as
the image channel.
