Hello Wolf,
congratulations for this project, I am sure it can open new
possibilities to would-be experimenters in LF.
As you mentioned, Jason V0.99 (to be released soon on the Web site) has
I/Q outputs, as does your
Spectrum Lab, so a couple of software tools are just waiting for some
soldering irons to be swiitched on,
and handled by the correct end...
I am wondering if a reverse form of the (in)famous Tayloe sampling
detector could be used here.
What I mean is to take your four I+, I-, Q+, Q- signals and to
multiplex them into a single output,
using an analog multiplexer, single pole, quadruple throw, like the
FST3253 or the ADG704, driven by
a clock 4x the wanted output frequency. This would simplify
considerably the hardware, should it work.
My soldering iron is on a temporary vacation, so I am relying on
someone else to volunteer for that...
73 Alberto I2PHD
-----------------------------------------------
Wolf DL4YHF wrote:
Hello
Alberto, Eberhard, John, and all,
I made some tests with an image-cancelling mixer for the 136 kHz
lately, using the "SSB phasing method" as described in the ARRL
handbook. The only tricky part, the 90° audio phase shifter, is
realized via software.
[...]
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