What is a Signal Analyzer?

A signal analyzer is an instrument that can be used to measure the frequencies and strength of signals that are broadcast from cell towers and satellites. Found on Aliexpress.com: TinySA Handheld Spectrum Analyzer 2.8 Inch Display 100KHz-960MHz. This portable signal analyzer will let you see the V2K, RNM, and scanning signals that are sent from cell towers. Cost is about $47.