According to your instruction, I setup testing. Network Analyzer (E5071C) connect to RFO series 22pF. And 1.8VDC power supply to VCC series 47nH. But I found Network Analyzer has a problem after I tuned M20057 matching with 1.8VDC. My Network Analyzer return loss cannot go back to 0dB in 1559MHz-1609MHz when I preset Network Analyzer. Is Network Analyzer damaged in Port1? Or other reason?
It is because I need to tune second version PCB board for M20057 module. Can you comment it. Thanks in advance.