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3DQDVRQLF
10.3. AM and SCART Processing
As mentioned at the start of the section on MSP3415
IC2001
IC2001
processing,
when
receiving
an
AM
modulated signal, as is system ’L’, the signal is
demodulated in the IF stage. The audio signal is then
fed to IC2001 pin 44 mono input. The demodulated
AM audio signal is then fed to an internal analogue
scart switching circuit which is used to select between
demodulated in the IF stage. The audio signal is then
fed to IC2001 pin 44 mono input. The demodulated
AM audio signal is then fed to an internal analogue
scart switching circuit which is used to select between
the scart signals input via pins 41 and 42. The
selected audio signals are then fed via an A/D
converter before being input to the DSP processing
stage. Once the audio signals are fed to the DSP
stage, the signals are fed via a prescaler circuit which,
as mentioned previously, adjusts the volume of the
audio signals, thus ensuring the signals are at the
same standard as the other signal sources at the
channel select circuit.
selected audio signals are then fed via an A/D
converter before being input to the DSP processing
stage. Once the audio signals are fed to the DSP
stage, the signals are fed via a prescaler circuit which,
as mentioned previously, adjusts the volume of the
audio signals, thus ensuring the signals are at the
same standard as the other signal sources at the
channel select circuit.
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