I just finished building a frequency synthesizer with the MAX038 waveform generator from MAXIM. My circuit is a copy of the high frequency waveform generator in the datasheet, with a 16F877 PIC controlling the device.
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The main PCB, with MAX038 high frequency waveform generator, power supply and 16F877 PIC controlling the frequency synthesizer. I have detected a small error in the PCB, pin 11 and 12 on the MAX038 IC has to be connected to ground.