Axcera's distributed transmission network solution consists of Axcera's DTxA2C Distributed Transmission Adapter, two or more slave transmitters with GPS receivers for precise reference, as well as system design, coverage analysis and integration services. This approach allows multiple signals to be broadcast in overlapping coverage areas on the same channel using the ATSC candidate standard for distributed transmission.

To achieve the necessary synchronization, the DTxA2C accepts a SMPTE 310M data stream with embedded placeholder packets and outputs a modified SMPTE 310M stream. The modified stream includes cadence sync for system timing and distributed transmission packets that contain all of the information necessary to operate the network.

The signal is then transported to the slave transmitters through a standard digital studio-to-transmitter link. The slaves accept the modified SMPTE 310M stream and respond to the cadence sync and distributed transmission packets, synchronizing their symbols, timing and pilot frequencies. Frequency synchronization and timing reference is achieved through GPS receivers at each location.

In cases where two or more channel frequencies are available, the main transmitter can serve as the transport mechanism for the modified SMPTE 310M signal, eliminating the need for separate STLs for each site. The main transmitter, on a unique channel, serves two purposes: 1 to broadcast the main signal to the city-of-license or primary coverage area and 2 to transport the SMPTE 310M signal to the slave transmitters. All translators can then broadcast synchronously, using distributed transmission to share a second channel.

With proper system design, standard consumer DTV receivers will successfully decode the synchronized signals, treating the time-displaced signals from multiple transmitters as simple multipath. When compared to the historical single-site broadcast model, Axcera's distributed transmission solutions provide an innovative approach to improving coverage.

Industry Renowned Manufacturing and Support
Like all Axcera products, the DTxA2C is manufactured and supported by our world-class organization under strict ISO 9001 quality control. Learn More

Interface
Transport Stream Inputs (two available) - Connector - Input Signal - Rate - Cable Equalization 10 MHz Reference Input - Connector - Input Signal 1 PPS Input - Connector Output - Connector - Rate	75 ohm, isolated BNC SMPTE 310M or ASI 19.39 Mbps Automatic 50 ohm, BNC -10 to +10 dBm 50 ohm, BNC 75 ohm, BNC 19.39 Mbps, SMPTE 310
General
ATSC Standards Operational Temp. Range Operational Humidity Range Max. Altitude Size (H x W x D) Weight Input Power Power Consumption	A/53; A/110; A/153 0º to 50ºC, derate 2ºC/1000 ft. 0% to 95%, non-condensing 10,000 ft. AMSL 5.25" x 19" x 24" rackmount 15 lbs 117/230 VAC ±10%, Single Phase, 50/60 Hz 100W, typical

For more information and detailed specifications please contact us at 724-873-8100 or email: info@axcera.com.