Way down in the specs you have the sampling rate, 122 MHz and I don't see a
spec for the A/D Equivalent Number Of Bits (ENOB). That is a useful measure
of the dynamic range, as most if not all 16 Bit A/Ds have a lower number of
ENOB. Perhaps these should be more prominently advertised as they can be
used to compare direct sampling SDRs in a more Apples to Apples fashion.
Do you use an FPGA as a Digital Down Converter? If so, prominently
advertise that too.
Having a high bandwidth I/Q output to USB or Ethernet, and a driver to the
standards used by multiple Panadapter and Spectrum Analysis software would
also be great.
Lastly, the ability to directly sync to a low phase noise 10 MHz reference
without frequency jumps would be very useful with said Spectrum Analyis
software to be able to use the K4 as a measuring tool. Maybe two modes,
sort of follow a crappy 10 MHz source and lock to one that has low enough
phase noise to match your radio's performance.
73,
Mark
W7MLG
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