MTM-427s is a state-of-the-art, cost-effective, compact spectrum analyser combining features for signal measurements and interference analysis. Convenient for laboratory and field use, it is engineered for field applications considering different use-cases and conditions. Durability means maximum RF protection and ruggedised construction, while convenience involves ease of use, intuitive interface, flexible test accessibility, and compactness. It maintains comparable performance and accuracy to conventional spectrum analysers while serving laboratory applications not requiring full benchtop capabilities. Highly compact size enables testing scenarios hard to realise, especially in-building DAS and small cells. State-of-the-art Zero-IF and FFT techniques provide required accuracy and speed. Frequency range 400-2700 MHz covers 2G GSM, 3G UMTS, 4G LTE, and WiFi 2.4 GHz bands.