频谱分析仪和矢量信号分析仪.pdf

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1、AnritsuBasicTrainingMaterial•…2confidential3confidential•(FFT)()Afff124confidentialAf1f2f5confidential•6confidential•,dBc,-dBc0.-20RBW=10KHz-40TOI-60RBW=1KHz-80-100-60-300+30(dBm)=(dBm)-7(dB)confidential•-105-107-109-111DISTORTION,dBcPotentialDynamicRange-113-115-90-60-300MixerLevel(dBm)8conf

2、idential•••RBW••VBW9confidential3dB•()RBWMixer3dBBW/LO(RBW)RBW10confidential•RBW11confidential•RBW10kHzRBW3dB10kHz12confidential•RBWRBW=1kHzRBW=10kHz3dB7.5kHz60dB60dBBW=15kHz10kHz10kHz13confidential•RBW14confidential•RBW(dB)=10log(RBW)/(RBW)100kHzRBW10dB10kHzRBW10dB1kHzRBWRBW=15confidential16confide

3、ntial(VBW)17confidential/100kHz:-123.77dBc/Hz18confidential50kHz,100kHz,:-69.86dBm/ch19confidential2X99NdB3dB:246.4kHz20confidentialACPR:L1:-70.74U1:-70.74L2:-78.47U2:-78.3121confidential-13.52dBm22confidentialAT15dB#RBt10kHz#T:SMPRLV:-54.1dBmTS1.9msVBt30kHz#0POWER-5POWER(dBm):-67.08

4、dBmPOWER(W):196pW-10-15-20-25-30-35-40-45-50DELAY:-1.318msFREQ:862.126600MHzTIMESPAN:1.9ms23confidentialGATEtimeFrequency24confidentialDUTRFinIFCRTDisplayLODUTTGoutTrackingAdjust25TrackingGeneratorconfidential•––••–––––26confidential••–AM,FM,PM,Pulse–IQ–/TDMACDMA•••27confidential“E(t)=E(t).cos(w(t).

5、t+F(t))ModCCCAMFMFM时间域频率域相位域ÛCÛCUCUCffCtconfidentialAmplitudeModulation•[1+mcos(ѡt)]Acos(ѡt)mc•E(t)=[1+mcos(ѡt)]cos(ѡt)=mccos(ѡt)+(m/2)cos(ѡt-ѡt)+(m/2)cos(ѡt+ѡt)ccmcm•cos(ѡt-ѡt)cos(ѡt+ѡt)cmcmѡm•cos(ѡt)c•<1/329confidentialm•:E(t)=[1+mcos(ѡt)]cos(ѡt)mc•m=(Ec-Emin)/Ec=(Emax-Ec)/Ec=(Emax-Emin)/(Emax+Emi

6、n)•:m/2=Esb/Ec•logm–log2=logEsb–logEc•m(dB)=-[Ec(dB)-Esb(dB)-6dB]30confidentialAmplitudeModulationU(t)=U(t).cos(w(t).t+F(t))ModCCCAMTimeDomainFrequencyDomainPhaseDomainUAMUCÛCmm2ÛC2ÛCmmUÛC2ÛC2ÛCmaxUCUminfCÛCm=UC/ÛC=(Umax-Umin)/2•ÛCconfidentialAngleModulation•frequencymodulation(FM)andphasemodulatio

7、n(ØM)都是角度调制•频率：Ѡ(t)=d[ϕ(t)]/dt,相角：ϕ(t)=∫Ѡ(t)dt•Ѡ(t)=Ѡc+ΔѠpkf(t)•E(t)=cos[ѡt+(ΔѠpk/Ѡm)sinѠmt]=J0(β)cosѠct-J1(β)[cos(Ѡc-Ѡm)t+ccos(Ѡc+Ѡm)t]-J2(β))[cos(Ѡc-2Ѡm)t+cos(Ѡc+2Ѡm)t]-J3(β))[cos(Ѡc-3Ѡm)t+cos(Ѡc+3Ѡ