The EXACT-DVB exciter's core modulation and correction functions are processed by firmware that resides on internal Field Programmable Gate Array (FPGA).
This architecture provides flexibility so as digital TV standards evolve and change, the processing can be upgraded and adapted to meet these new requirements, simply by loading new firmware.
Beyond the FPGA technology, the exciter platform incorporates a microcontroller for user interface to the monitor and control functions. Custom software running in the exciter provides user access through various Man-Machine Interfaces (MMI) provided from the EXACTDVB.
The EXACT-DVB exciter integrates Digital Adaptive Precorrection (DAP) technology, which provides superior performance that is unattainable using any other correction technique.
This technology allows for simple and easy setup and maintenance of a high performance transmitter system.
DAP technology provides unsurpassed digital correction of all distortions created by a DTV transmitter system. These distortions include nonlinear distortions created by active amplifier devices, such as amplitude and phase distortions along with correction for memory effect. Additionally DAP corrects linear distortions created by the transmitter’s high-power passive RF system, such as group delay and frequency response distortions maximizing the MER performance.
The EXACT-DVB exciter incorporates local control and monitoring using an enhanced user interface front panel with backlit LCD display, LED’s, and menu driven push buttons. Local access includes menus for initial setup, configuration status and control functions The front panel displays the forward & reflected power levels, output RF shoulders as well as the SNR performance.
The EXACT-DVB exciter can also be remotely controlled using the Web GUI interface with nothing more than a PC running a standard web browser. The Web GUI allows users to retrieve information such as MER, lower and upper RF shoulder measurements, user configuration, and alarms.
The EXACT-DVB is fully compliant with the DVB-T & T2 DTV standards. The EXACT-DVB can also be optionally licensed to support DVB-T2- Lite. The exciter allows simultaneous transmission of DVB-T2-Lite with DVB-T2 Base on the same RF channel, facilitating mobile services.
The EXACT-DVB features two independent sets of dual (A & B) transport stream (TS) inputs. The dual TS inputs allow signal path diversity (i.e. one ASI TS feed via a fiber link and a second ASI TS feed via a STL microwave). The A & B TS switching can be set for automatic or manual depending on the user's preference.
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