Portable Radio Frequency Spectrum Analyzer can be used for measuring spectrum purity, signal distortion, parasitism and intermodulation. Radio Frequency Spectrum Analyzer can also be used for many kinds of modulated signal analysis such as the transmitted power of the transmitter, bandwidth, harmonic wave or anharmonic wave, the uplink or downlink frequency of the satellite communication equipment and adjacent channel power in tactical radio. The Radio Frequency Spectrum Analyzer is featured with multi-window and local-scale measurement display and five -trace- line display. Portable Radio Frequency Spectrum Analyzer is equipped with trace source and can be availed with various interface such as USB, LAN, VGA, RS232 and GPIB as per requirement.