?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 ?Waterfall spectrum graph mode: show a period of time (sweep the length and width as well as RBW related, the shortest a few seconds, the longest can amount to tens of minutes) changes over time within the spectrum distribution, to identify the signal rel ?Spectrum thermodynamic diagram model: it 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 char ?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. ?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