High Performance: Experience unparalleled performance with our Portable Spectrum Analyzer, featuring a frequency range of 35‑4400MHz. Powered by the stm32f407 microcontroller with a main frequency of 168M, this device ensures fast and efficient processing. The 4.3-inch TFT LCD screen with a resolution of 480x800 provides clear and vibrant visuals, all encased in a durable aluminum alloy shell with a rotating encoder for easy control. Working Mode: Designed for versatility, this ultra external difference scanning spectrometer offers a single scanning time of just 800ms. It's perfect for a wide range of applications, including two-way radios, toy remote controls, and 2.4G WiFi, making it an essential tool for both hobbyists and professionals. Adjustable DBm: Tailor your measurements with a DBm range from ‑80dB to 10dB, supporting manual adjustment of the calibration amplitude. Please note that the device does not include an internal amplifier circuit, so an external amplifier is recommended for measuring small signals. 5 Gears: Customize your analysis with five adjustable RBW gears: 10kHz, 50kHz, 100kHz, 200kHz, and 500kHz. The scanning span options are 7M (10kHz), 35M (50kHz), 70M (100kHz), 140M (200kHz), and 350M (500kHz), providing flexibility for various signal environments. High Accuracy: Achieve precise measurements with our advanced technology that mixes the local oscillator signal with the external measurement signal to obtain the differential frequency signal. The high accuracy VCO signal source ensures that the frequency of the external differential signal is measured with exceptional precision, making this spectrum analyzer a reliable choice for accurate signal analysis.