The RSA3303A and RSA3308A are portable real-time spectrum analyzers with RF measurement capability up to 3 GHz (RSA3303A) and 8 GHz (RSA3308A). The real-time spectrum analyzer has a vastly different architecture from traditional tools, and is uniquely capable of capturing continuous, intermittent, or random signals with equal ease. The waveform and measurement results of data acquired seamlessly can be displayed in various formats such as frequency versus amplitude, time versus amplitude/frequency/phase, AM/FM/PM demodulation, and spectrogram containing three dimensional information of frequency, time, and amplitude/phase. DC to 3 GHz (RSA3303A) / 8 GHz (RSA3308A) measurement frequency range 100 Hz to 3 GHz measurement span and 15 MHz vector span Real-time analysis for seamless capture of time-varying RF signals Spectrum analysis of power, ACPR, C/N, OBW, EBW, and spurious Analog modulation analysis of AM, PM, FM, ASK and FSK signals Digital modulation analysis ranging from BPSK to 256QAM (Option 21) Time characteristic analysis including pulse measurements CCDF analysis AM/AM and AM/PM distortion analyses (Option 21) Time-correlated simultaneous views Spectrum display Spectrogram display (frequency versus time versus power) Time domain display (IS-95 standard) Analog demodulation display: time versus modulation factor, phase, or frequency Digital demodulation display (Option 21): constellation, eye diagram, symbol table, or EVM 8.4 inch TFT color display and sturdy cabinet Difference between RSA3303A and RSA3308A The RSA3303A and the RSA3308A have the same functions except for their measurement frequency ranges: RSA3303A . . . . . . . . . DC to 3 GHz RSA3308A . . . . . . . . . DC to 8 GHz