Single-frequency Network - ATSC and 8VSB

ATSC and 8VSB

While not designed with on-channel repeaters in mind, the 8VSB modulation method used in North America for digital TV is relatively good at ghost cancellation. Early experiments at WPSU-TV led to an ATSC standard for SFNs, A/110. ATSC SFNs have seen widest use in mountainous areas like Puerto Rico and Southern California, but are also in use or planned in gentler terrain.

Early ATSC tuners were not very good at handling multipath propagation, but later systems have seen significant improvements.

Through the use of virtual channel numbering, a multi-frequency network (MFN) can appear as an SFN to the viewer in ATSC.