APF-01 Analog Program Fail Detector & Emergency Player



The B-Tech APF-01 sets a new standard in broadcast program monitoring, combining intelligent source monitoring, automatic changeover, and emergency program playout in a compact 1RU unit.

The APF-01 continuously monitors two independent balanced analogue stereo program paths, allowing broadcasters to maintain uninterrupted transmission.

Input A serves as the primary program source, while Input B provides an automatic backup should the primary source fail.

If both program sources are lost, the integrated USB MP3 player automatically takes over, providing emergency program audio until a valid source is restored.

Once normal operation resumes, the APF-01 automatically returns to the selected program source after the configured delay.

Bright front-panel LED VU meters provide an instant visual indication of the audio levels for both monitored sources, while the LCD display clearly shows the current ON-AIR source and the selected headphone monitoring source.

With integrated GPO status outputs and web interface with SNMP support, the APF-01 can be easily monitored and controlled remotely, making it ideal for broadcast studios, transmitter sites, and other critical audio applications.

Designed with reliability in mind, the unit features a passive fail-safe bypass. In the event of a power supply failure, Input A is automatically routed directly to the outputs, ensuring uninterrupted program audio.

Features

  • Dual balanced stereo RJ45 inputs

  • Dual parallel balanced stereo RJ45 outputs

  • Automatic switching between primary and backup programme sources

  • Integrated USB MP3 emergency program playout

  • High-contrast front-panel LED VU meters

  • LCD display showing ON-AIR and headphone monitor source

  • Adjustable input monitoring sensitivity and emergency output level via rear-panel trimpots

  • User-configurable fail threshold and switching delays using the front-panel controls

  • Selectable headphone monitoring source

  • Passive fail-safe bypass routing Input A directly to the outputs during power loss

  • GPO status outputs for remote monitoring

  • Web interface with SNMP support for remote monitoring and control

  • 1RU aluminium enclosure