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outband signal in gsm
Answer for Q1: When a large blocker make the receiver compression, Small desired signal gain will decrease. So the sensitivity is worse.
Re: how to choose resonable two-tone freq. for IIp3 simulat
Channel spacing of GSM is 200KHz. IP3 test frequencies should based on the intermodulation requirement, which is f+800KHz(CW) and f+1600KHz(GMSK). So that 2(f+800KHz)-(f+1600KHz)=f.
Re: RF PCB experience
Also, seperate different frequencies. Seperate TX and RX, make strong signal far away from receiver. Make sure microstrip line always has big GND. VCO control line need to be very careful seperated.etc.
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