IF/Baseband Chain: Now, that the frequency is lowered to 1.2-1.7 GHz, we can add about 20 dB
of gain at this stage in order to boost the signal. The 1.2-1.7 GHz becomes the new carrier and the
video and sound information is still on top of this carrier. In the satellite case, the IF is mixed
again to baseband (0-2.5 MHz) using another oscillator in the 1.2-1.7 GHz range. The frequency
of this oscillator is set at 1.2-1.7 GHz (variable setting) so as to select a single 2.5 MHz channel
out of the 200 channels. Once the signal is at baseband (0-2.5 MHz), the signal is then amplified
using standard CMOS electronics by 80 dB (the amplification is done at 0-2.5 MHz), sent to the
DSP chip, and the DSP does the digital demodulation.