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Technical Reference

MultiTuner is a professional multi-channel FM monitoring appliance designed for broadcast compliance, signal quality assurance, and IP restreaming. It enables operators to continuously monitor FM broadcasts, detect signal anomalies, and redistribute audio over IP networks — all from a compact 1U rack-mount unit.

What MultiTuner Does

MultiTuner receives FM radio signals through a feeder antenna, processes them through its internal receiver modules, and provides real-time measurements and monitoring via a built-in web interface. Each receiver module handles up to 4 channels independently; the device is available in 8- and 16-channel configurations.

Key Features

  • Multi-channel FM monitoring — 8 or 16 simultaneous channels
  • Real-time signal measurements — RF level, SNR, interference detection, pilot signal presence
  • RDS decoding — receives and displays RDS text and metadata
  • IP streaming — converts FM audio to UDP multicast or unicast transport streams
  • Audio monitoring output — 3.5 mm headphone jack on the front panel for live listening
  • Web interface — full configuration and monitoring through any modern browser
  • REST API — remote configuration, alarm polling, and integration with third-party systems
  • MultiProbe integration — compatible with Stream Labs MultiProbe monitoring architecture
  • NVRAM storage — configuration persists across power cycles without external dependencies

Typical Use Cases

Use Case Description
Broadcast compliance Continuous unattended monitoring of on-air FM channels for regulatory requirements
Remote site monitoring Deployed at transmitter sites as a maintenance-free monitoring node
IP restreaming Converts over-the-air FM broadcasts into UDP transport streams for network distribution
Distributed monitoring Part of a larger MultiProbe-based network monitoring infrastructure

Getting Started

If this is your first time setting up MultiTuner, follow these steps:

  1. Install the device in a rack and connect power and antenna
  2. Connect to the network — directly or via a switch
  3. Open the web interface and log in with the default credentials
  4. Configure FM channels and start monitoring