THANK YOU Erik, it just keeps getting better and better!
I was going to ask you about the PE4302 boards.. you beat me to it.
I am still waiting for parts...
73,
Gary
WB6OGD
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For some measurements an input attenuator is essential. Adding a
step attenuator is pure convenience as manually adding input
attenuation works also.
I went for a ready made module found on eBay that uses the
affordable 3.3Volt compatible PE4302 step attenuator.
There are two versions, one using parallel (6 parallel bits) input
and the other with serial (e.g. a data and clock line) input to
control the 64 attenuation steps from 0dB till -31.5dB
There where sufficient free bits on the arduino zero so I choose
parallel as can be seen in this picture of all modules together.
The step attenuator is at the middle bottom, before the low pass
filter.
The SA.exe controls the step attenuator through the P5 message.
I will update the arduino code in the files area to incorporate
this added functionality
The only thing left to finish the TinySA is to add shielding to
the modules and put it in nice box. .
--
HBTE Files section:?/g/HBTE/files
Erik, PD0EK
