How to make Single Frequency Network(SFN) Synchronous FM Radio Stations with 1pps transmitter

FMUSER FM SFN (Single Frequency Network) is a broadcasting network where different FM-transmitters are sending out the same audio on the same frequency and absolutely time synchronized.

The advantage of a SFN is the efficient utilization of the frequency spectrum, allowing a higher number of radio programs to be transmitted.

An SFN may also increase the coverage area and decrease the outage probability in comparison to an MFN, since the total received signal strength may increase to positions midway between the transmitters.

And the fm radio listener does not need to change the frequency go around all over the country on a frequency.s
China is using the SFN Transmitter on China National Radio,CNR, Now the CNR is the biggest radio station in China.

Single Frequency Network (SFN)
We also call it sync FM, synchronized FM Broadcast, synchronized/synchronous FM transmitter, time synchronous FM transmission/playout, single frequency FM/radio network:

One challenge for the perfect function of such a system is the very high accuracy in time synchronization (audio quality, interference) of the signal to be transmitted. Fmuser 1pps encoder and decoder is helping the Africa radio station to build they SFN radio station.

Broadcaster worldwide are using different types of content distribution (ASI, E1, satellite, IP) to improve redundancy, to be more variable and to save costs.

Any transmission feed to the FM transmitter, even the well synchronized feed via E1, produces different delays. Unsteady packet delays within an IP-feed (Jitter) or a Satellite feed might lead to even higher delay which makes the different FM cell synchronization much more Complicated.

The FMUSER SFN synchronized Broadcast system enables your signal to be exactly synchronized within the contribution path of the FM-SFN network.

if you have any question about how to do a sfn network broadcast ,please feel free to discuss here.