How to use MicroMPX

Because different vendors may offer different interfaces and feature sets, this guide provides a general overview of how MicroMPX is typically set up. For specific instructions, please consult your vendor’s documentation. (See supported devices.)

Studio side

If your FM processor includes a built-in MicroMPX encoder, you can send the signal directly to one or more transmitters over the network. Alternatively, you can use a standalone MicroMPX encoder connected to the digital or analog MPX output of your processor.

You typically only have to type in the IP addresses of the receivers, and potentially set the port number if it's not the default.

Transmitter side

If your FM transmitter includes a built-in MicroMPX decoder, simply connect the incoming MicroMPX stream to its network port. If not, use a standalone MicroMPX decoder and feed its digital or analog MPX output to the transmitter’s MPX input.

Setup is typically minimal—just change the port number if it's not the default.

Network configuration

MicroMPX typically uses UDP packets (some vendors may add their own transport layers). If the packets leave your local network, you may need to configure port forwarding on routers at the transmitter sites. A static IP address on the transmitter site is required in most cases.

Synchronization between transmitters

In most cases, setting the same delay on all decoder units will keep transmitter signals in near-perfect sync—sufficient for seamless RDS AF switching. Fine-tuning may be needed when using multiple network types with differing latency characteristics, such as satellite links.

Some encoders and decoders support Single Frequency Network (SFN) operation via GPS, typically achieving timing accuracy within 1 microsecond. Support and compatibility vary between vendors; refer to your equipment’s manual for details on configuration and interoperability.