You might want to check out the VNA I designed
which is a VNA based on the EU1KY bridge but similar to the NanoVNA with
S11 and S21 capability. It also conveniently features a breakout header
for all of the signals so they can all be controlled and sampled from an
external PC if desired.
The VNA I designed can measure from about 1 to 20000 ohms because of the
bridge design, which is based on current and voltage sensing rather than a
50 ohm output, but it computes what would have been observed with a perfect
50 ohm output port.
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On Tue, Oct 22, 2019 at 11:54 AM <erik@...> wrote:
A subfolder of the github Tapr-vna is named "Arduino"
It contains the arduino SW required to run on a arduino nano that controls
the SI5351 over I2S and the reflection/transmission switch
So tapr-vna communicates over a com port with the arduino SW .
The output of the "audio bridge.pdf" schematic (Audioright/audioleft) go
to the line input of a PC
The two sine generators on the same schematic are the two outputs of the
SI5351. (so they are not sinus but square wave)
If you want you can also copy the nanoVNA schematic w.r.t to SI5351 and
SA612.
Does this help?
