The AxelTech FOX 3 Digital Silence Detector automatically detects audio loss and switches to backup sources to keep broadcasts on air 24/7.
Product Description
The AxelTech FOX 3 Digital Silence Detector is a professional audio monitoring and changeover unit designed to maintain continuous broadcast audio under any condition. It automatically detects silence, distortion, or audio loss and seamlessly switches to an auxiliary source, ensuring uninterrupted transmission for both radio and television operations.
Developed by AxelTech, the FOX 3 combines reliability, precision, and flexibility in one compact unit. Its digital signal processor continuously analyzes both analog and digital inputs, while adjustable thresholds and delay times allow engineers to tailor detection sensitivity to specific program needs.
The FOX 3 provides full remote supervision through TCP/IP, SNMP, and email alerts, instantly notifying operators when silence or audio anomalies occur. It also features front-panel LED indicators and a display for clear status feedback. Integration is simple, thanks to relay contacts, balanced I/O, and AES/EBU connectivity, making the FOX 3 ideal for any modern broadcast facility.
Key Features:
• Automatic silence detection and audio source switching
• Supports analog and AES/EBU digital inputs
• Adjustable detection thresholds and switching delays
• TCP/IP and SNMP remote monitoring
• Email alarm notifications for instant alerts
• Compact 1U rackmount design
• Front-panel indicators for status and operation
Technical Specifications:
• Audio Inputs: Analog L/R + Digital AES/EBU
• Audio Outputs: Balanced L/R, Relay Changeover
• Frequency Response: 20 Hz – 20 kHz
• Detection Delay: 0.5 – 60 seconds (configurable)
• Communication: Ethernet 10/100 Base-T, RS-232
• Power Supply: 90 – 240 VAC, 50/60 Hz
• Dimensions: 19″ rackmount, 1U
• Weight: approx. 2.5 kg
Applications:
• Radio and TV broadcast audio silence monitoring
• Automatic audio backup switching systems
• Network operations centers and transmitter sites
• Continuous on-air quality assurance
Alternative Products:
• DEVA Broadcast DB8009 – Silence Detector & Backup Switcher
• Inovonics 610 – Broadcast Failover Switcher
• BW Broadcast Silence Monitor Pro
All alternative products are available from Broadcasters Warehouse.




