The Harris® Synchrony™ MNA provides a variety of functions to enable ATSC broadcasters an efficient means of expanding their main channel and mobile digital broadcast services. It enables the creation of distributed transmission systems (DTS) in which multiple transmitters operate on the same frequency to improve coverage. Additionally, as a key component of the Harris MPH™ ATSC Mobile DTV solution, Synchrony MNA seamlessly brings together main channel HD and SD, mobile audio/video streams and supporting content data, into a complete service multiplex.
A single unit can be configured as a DTS adapter, mobile multiplexer or both. The broadcast studio requires only one Synchrony MNA to address several vital concerns for broadcasters—expanding digital coverage to reach new markets, filling coverage gaps created by digital coverage patterns and taking advantage of the opportunities afforded by mobile video and datacasting.
Distributed Transmission Systems (DTS)
Distributed Transmission Systems (DTS) are one of the solutions recommended to ATSC broadcasters to address the coverage gaps and variations resulting from their digital conversion.
Timing and Synchronization
Serving as the core of DTS implementation, Synchrony MNA precisely manages the timing and synchronization of the modulated signal in each transmitter to minimize interference zones where coverage overlaps. It inserts GPS timing information into the data stream delivered to the transmitters from the studio and centralizes control of the transmitters DTS functions.
DTV, Mobile and DTS Standards
Synchrony MNA operates with full compliance in DTV (ATSC standard A/53), mobile (ATSC standard A/153), and DTS (ATSC standard A/110:2011). Approval of the A/153 ATSC Mobile DTV Standard is a key development providing broadcasters with new broadcast and broadband revenue streams. The Synchrony MNA preprocesses mobile video for generation of the mobile signal and multiplexes mobile data into the ATSC transport stream.
Flexibility and Upgradeability
Flexibility and upgradeability are key considerations for broadcasters as they evaluate solutions for expanding into new digital broadcast and service models.
Quality and Reliability
Harris quality ensures the highest level of reliability to keep all services on the air.
Specifications and designs are subject to change without notice.
|Transport Stream||2 BNC, 75 ohms, configurable as DVB-ASI (DVB-ASI standard EN 50083-9:2002) or SMPTE 310M (SMPTE 310M-2004) for ATSC transport input|
|Ethernet||2x8-pin modular RJ-45 10/100 management network interface
1x8-pin modular RJ-45 10/100/1000 MH stream/data interface
|1 PPS Reference Input||1 BNC, 50 ohms|
|10 Mhz Reference Input||1 BNC, 50 ohms|
|GPS Antenna Input||1 SMA, 50 ohms|
|Craft Port||1 RS-232, DB-9F|
|Alarms||4 relay contacts via DB-9F|
|AC Power Input||1x90 to 265 V AC, 47 to 63 Hz auto-ranging|
|Transport Stream||2 BNC, 75 ohms, configurable as DVB-ASI (DVB-ASI standard EN 50083-9:2002) or SMPTE 310M (SMPTE 310M-2004)|
|Monitor||1 BNC, 75 ohms, configurable as DVB-ASI (DVB-ASI standard EN 50083-9:2002) or SMPTE 310M (SMPTE 310M-2004)|
|1 PPS Reference Output||1 BNC, 50 ohms|
|Environmental||32° to 122° F (0° to 50° C), 10 to 90% humidity, non-condensing|
|Altitude||0 to 9,842 ft (3000 m) RoHS|
|Physical||19 in. EIA rack standard, 1RU high, 11 in. (28 cm) depth|
|Acoustic Noise||-<60 dBA|
Monitoring and Control
Browser-based user GUI
Dual A/153 output streams
Power or equipment failure bypasses MH systems, and the A/53 stream is directed to the output
User bypass of MH system
ATSC MH Signaling Parameters
Signaling tables and component descriptors supported internally via Synchrony MNA or externally third-party device
Transmission parameter channel supported internally via Synchrony MNA
All other signaling supported externally from third-party device
Operations and maintenance packet structure per A/110:2011 including:
- Synchronization time stamp (STS)
- Maximum delay (MD)
- Offset delay (OD)
Pilot frequency stability of ±0.5 Hz of nominal
Operational support for 2 groups each with up to 32 transmitters per group