This time the four mixer modules are finished.
There is unfortunately not much to tell, except since one of them (Mixer 1) is directly coupled to the input stage, shielding is important.
Mixer 1 is responsible for the input.
Mixer 2 is placed directly behind the cavity filter.
Mixer 3 is responsible for the tracking generator output.
Mixer 4 is needed for the Vna functionality.
Since I am building the full blown analyzer, I had to build all four of them.
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| Mixer 1 to 4 with brass shielding and matching lids |
Links:
Spectrum analyzer Part I Controller board
Spectrum analyzer Part II Phase Detector
Spectrum analyzer Part III ADC 16
Spectrum analyzer Part IV Logarithmic Detector
Spectrum analyzer Part V Master Oscillator
Spectrum analyzer Part VI DDS
Spectrum analyzer Part VII The Frame
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