Biquad MPX-2 is an intelligent MPX changeover and silence detection unit for FM stations, providing dual MPX inputs and outputs with automatic, manual and GPIO-controlled switching to keep the transmitter on air when a processor, link or source fails.
$ 773.00
The Biquad MPX-2 Silence Detection Unit is designed to protect FM broadcasters against silence and loss of composite signal at the transmitter. Any failure in the MPX link, audio processor or transmission chain can result in dead air and listener loss, so MPX‑2 continuously monitors the MPX level and switches between main and backup sources to maintain programme continuity.
Biquad MPX-2 provides two MPX inputs and two MPX outputs that allow stations to build redundant source and transmitter chains. IN A is typically fed from the main processor or main MPX link, while IN B receives a backup processor or reserve MPX path. OUT A feeds the main transmitter and OUT B feeds a backup transmitter, giving engineers a straightforward way to arrange composite redundancy without complex routing.
The unit supports three operating modes. In automatic mode it detects absence or low level on IN A and switches to IN B according to configurable thresholds and timing, restoring audio without operator intervention. In manual mode the front-panel switches let engineers choose the active input directly, useful for planned maintenance or on-site testing. A remote mode using GPIO allows MPX‑2 to be controlled by external automation or monitoring systems, integrating the changeover function into wider station logic.
Biquad MPX-2 is intended to sit in the composite section of a complete radio studio and transmission installation, providing the redundancy layer between the studio and FM transmitters. Within turnkey systems planned and supplied by Broadcasters Warehouse, MPX‑2 works alongside studio consoles, automation, audio processing, STL links and FM transmitters to ensure that any failure in the MPX path or individual device does not result in dead air. By incorporating MPX‑2 into the overall design, broadcasters gain a resilient MPX changeover and silence detection stage that helps keep the station on air and protects audience and revenue.
