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The whole test setup is remotely controlled via ethernet (white lead). I took the ADF4350 test code I wrote and integrated it with the ts2iq program I wrote earlier (
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), so now the ADF4350 board (foreground) provides 2.4 GHz to the AD8346 QAM modulator on the board north of it, the VCOs are now disabled on that board. What comes out is mixed down in the black box on the right, and fed into a long coax that goes to the PC where the first picture is taken from.
Will try to fit that ADF4350 board on the big eurocard, else we need a separate card..
A few simple command line options in ts2iq_pi allows now to set any frequency between 138 MHz and 4.4 GHz, as well ar 4 output levels in dBm. I already have the driver amp and a 70 W power amp... The rest is boxes.
The other stuff on the table is either used, or was helpful in testing this. :-)
On the spectrum analyzer things look good too, and note the QAM constellation in the first picture.
The Raspberry generates all signals, video stream is on SDcard, it controls the ADF4350 too. Symbolrate 1500.. FEC 1/2.