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A 2.4GHz to 1.5 GHz down converter layout, and VCO internals.

Started by Jan Panteltje November 12, 2014
A 2.4GHz to 1.5 GHz down converter

A whole new range of interesting frequencies opens up with this litte converter,
here now in box with antenna:
 http://panteltje.com/pub/2.4_GHz_to_1.5_GHz_mixer_in_box_IMG_4661.JPG

Modified my rtl_sdr based xpsa spectrum analyzer software to allow for a local oscillator setting:
 
I found a peculiar very strong intermittent signal around 2432271360 Hz,
it turned out to be my Logitech wireless mouse ;-)
 http://panteltje.com/pub/wireles_mouse_spectrum.gif

The more I mouse the more constant the signal.

Where is the upper limit?
Around 3.2 GHz with this VCO I think.
No reason one cannot use a higher frequency VCO, then the mixer is the limit.

Nice new tool added!