Forward Error Correction (FEC)

FEC improves the reliability of data transfer over the radio by adding additional correction information to the radio messages. Based on that information, the receiving radio will be able to correct erroneous bits provided the ratio of erroneous and correct bits is reasonable.

However, the use of FEC decreases the data throughput because the amount of transmitted data increases about 30 %. FEC should be used on long distance links and/or if the radio channel is "noisy" in other words suffering from interfering signals.

All radios, which are to communicate with each other, must have the same setting for FEC (ON or OFF). If the transmitting radio and the receiving radio have different settings, data will not be received.

The FEC mode setting on the TDL510 radio only applies to the SATELLINE-3AS protocol. The following OTA (over-the-air) protocols have FEC permanently enabled:

  • PacCrest-4FSK

  • PacCrest-GMSK

  • PacCrest-FST