Dear LF friends,
few details to add to my last message:
ADC is actually a 18 bit resolution (Burr-Brown)
DSP uses 16 bit for calculation
DSP-1 determines the final IF BW and demodulates
DSP-2 does noise-reduction and notch filtering
To Dave Brown:
The receiver has one discrete attenuator of 40 dB
which is switched into the signal path as soon as
the input level reaches or exceeds +10dBm (10mW
into 50 Ohms), and while the receiver is switched OFF.
The mentioned -102dBm level was measured
with 50 Hz bandwidth.
Best 73 de Gamal Soegiono
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