Multi-functions Provides High Efficiency Performance: This Portable Signal Generator has multi-functions, such as real-time spectrum analysis mode: real-time spectrum curve scanning, which can set the function of SPAN (sweep) /RBW (resolution bandwidth) /CENT (central frequency) /MARKER (MARKER point), or set the start and end frequency, MAXHLOD (maximum maintenance) function, maximum/peakvalue automatic detection and identification, etc Waterfall Spectrum Graph Function: This Handheld Spectrum Analyzer shows the whole time and spectrum characteristics within a period of time, and can record all spectrum distributions within 5 minutes cyclically, so as to facilitate the inspection of frequency interference, emission leakage and other problems Spectrum Thermodynamic Diagram Function: This Spectrum Analyzer Signal Generator shows the repeated density of the spectrum in a period of time, and the single occurrence is blue, and the more repeated times, the more red it tends to be, so as to facilitate the analysis of the statistical characteristics of the spectrum in a period of time Easy and Convenient to Charge: Portable spectrum analyzer, built-in lithium battery and small size and lightweight, using the standard 5V charger can be charged, full charge can last about 9 hours Widely Applications: This Handheld Spectrum Analyzer Model has widely applications, it is widely used in operator application, military and policemen field, college application field, power grid application, civil aviation applicatio, radio and television application, rail transit field, Uav field, wireless sound field, the internet of things research and development, production, testing field, vehicle equipment field etc