User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD 8VSB ATSC Modulator
ATSC Transmitter/Regenerative Translator
Instruction Manual, Rev. 2 34
8VSB ATSC Modulator Board
The Modulator design is based on the Advanced Universal Modulator board, customized
to comply with ATSC standards A/53, A/54 A/64, A/110 and A/153.
The modulator converts an MPEG-2 transport stream to an 8-VSB modulated RF signal.
Using a new direct digital conversion process, the modulator is able to provide an RF
output that covers a standard frequency range of 470 MHz to 1 GHz with superior
shoulders and MER. Optionally, the modulator can be configured with an IF frequency
range of 30 MHz to 100 MHz or a RF frequency range of 30 MHz to 1 GHz.
The modulator supports ATSC features such as 8-VSB modulation, ATSC M/H processing,
MFN network mode and SFN network modes with Distributed Transmission.
The modulator comes equipped with Adaptive Non-linear and Linear Digital Pre-
correction that provide compensation for the non-linear distortions produced by a High
Power Amplifier and the group delay introduced by an output filter. The Adaptive Pre-
correction support continuous or single run adaptation, provides MER, Peak to Average
Ratio, Upper Shoulder, Lower Shoulder and Group Delay measurements and allows the
user to store curves on the modulator. The modulator also features Manual Non-linear
and Linear Digital Pre-correction.
The modulator Controller functions are performed by an embedded controller, based on
the PowerPC™ (IBM) processor. The Controller provides all external communication
interfaces as well as internal board and peripheral controls. CLI, Web GUI, SNMP and
Machine-to-Machine interfaces are all supported. Full remote management and control
as well as remote firmware and software upgrades are provided.
Control and Communication
The modulator can be controlled and monitored locally (on-site), or remotely from a
Network Management System (NMS).
Control and Communication Interfaces
There are two interface ports provided for control and communication:
• Ethernet Port (RJ-45) – used for local control with a laptop PC and remote access
through a LAN. Web GUI, SNMP and CLI (Telnet and HyperTerminal) protocols
are supported.
• USB Port (Type B) – used for local control, initial setup, status information and
troubleshooting with a laptop PC. A Command Line Interface (CLI) is the
supported protocol.
SNMP
The modulator SNMP interface provides the means for remote management of the
modulator and to accept alarm traps. The notification options can be configured on a
per-alarm basis. The user may decide to mask certain alarms, increase/decrease
integration time to declare an alarm, etc. Alarm and event logs are available via the
SNMP interface and are stored in Non Volatile Memory.