The FM Radio Intercom Signal Generator is built with a robust ABS housing designed for long service life in field and lab environments. It covers a wide testing range from 5 MHz to 470 MHz, making it suitable for diverse FM intercom and radio testing tasks. Key benefits Durable ABS construction for reliable performance during frequent testing and handling. Wide frequency range (5 MHz to 470 MHz) supports a variety of FM intercom and radio applications. Accurate sensitivity readings (120 dBm to 130 dBm) that align with professional equipment standards. Integrated 800 Hz audio modulation for consistent test tones, with analog and digital CTCSS functionality for versatile use. Easy operation with a standard 8–12 V DC power supply and a clear 7digit display for straightforward monitoring. What makes it practical Built for professional testing and calibration in both field and lab settings. Compatible with environments that require CTCSS functionality and precise modulation tones. Simple power requirement and a readable display help reduce testing time and errors. 23 practical use scenarios Field service of FM intercom networks: generate test signals with defined modulation and CTCSS options, then monitor the frequency readout on the 7digit display to verify system performance. Lab bench calibration: use the integrated 800 Hz modulation and the specified sensitivity range to check receivers and intercoms for correct modulation behavior and signal strength. Industrial radio maintenance: onsite testing of portable radios and related equipment across the 5 MHz to 470 MHz band, ensuring accurate readings and proper tone signaling in both analog and digital CTCSS contexts. Overall, this generator provides a stable, durable solution for accurate frequency testing, modulation verification, and CTCSS support in a compact, easytouse package.