System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Framework.DefaultPage.OnLoad(EventArgs e) in e:\websites\\public_html\Default.aspx.cs:line 791 ATSC approves recommended practice on Synchronized Multiple Transmitter Networks | TvTechnology

ATSC approves recommended practice on Synchronized Multiple Transmitter Networks

October 4, 2004

The Advanced Television Systems Committee (ATSC) has approved a new recommended practice: A/111, “Design of Synchronized Multiple Transmitter Networks.”

The document provides guidance on the design of specialized transmission facilities that utilize multiple transmitters to cover a station’s service area. Single Frequency Networks (SFNs) and Multiple Frequency Networks (MFNs) can be used to address specific signal coverage issues, including those relating to difficult terrain.

As described in A/111, these networks can be implemented using Digital On-Channel Repeaters (DOCRs), Distributed Transmission (DTx) systems, or Distributed Translators (DTxRs). A/111 focuses on the design aspects of SFNs.

Merrill Weiss, who led the ATSC effort to develop the new Recommended Practice, said A/111 is required reading for anyone interested in the design of Single Frequency Networks.

Benefits of the SFNs described in A/111 inlcude:

  • More uniform signal levels throughout the area being served
  • Reduced interference
  • Fewer terrain limitations
  • More reliable indoor reception

A/111 was developed in the ATSC Specialist Group on Transmission (T3/S9). The document is a companion publication to ATSC Standard A/110, which describes the means to synchronize the emissions of multiple DTV transmitters. This capability is necessary to making a Distributed Transmission system practical.

A Recommended Practice is a document that typically provides guidelines for operation and performance. The ATSC has adopted a variety of recommended practices for different industry segments in the DTV field.

A copy of the approved standard is available from the ATSC.

For more information, visit

Back to the top

Receive regular news and technology updates.
Sign up for our free newsletter here.