Overview

GME3DE10 Modulator( exciter) supports DTMB、DVB-T/T2  standard in all modes,, and implements the conversion from the baseband TS input data to VHF or UHF terrestrial digital TV broadcast RF signal which meets DTMB/DVB-T/DVB-T2  standard. It mainly consist of the baseband processing, digital to analog conversion, frequency synthesizer, RF signal amplification, monitoring system and other functional modules, featured with simple circuit, good performance, stable and long-time continuous operation.

Features

1)Support DTMB/DVB-T/DVB-T2  standard in all modes and meet all requirements of the standards.
2)Use adaptive digital pre-correction multi-dimensional non-linear pre-distortion and precision demodulation technology, with high-precision, fully automatic and adaptive linear and nonlinear pre-correction function.
3)Unique dual feedback input ports, which can simultaneously sample the output signals after the final-stage power amplifier and after band pass filter to achieve the pre-correction to PA linear/nonlinear distortion and passive components linear distortion at the same time, to further improve the quality of transmitting signal.
4)Real-time monitoring of output signal quality, and can automatically start pre-correction processing to ensure optimal working state when transmission system performance degrades.
5)Use direct digital RF broadband automatic balancing technology to achieve near-perfect modulation and frequency conversion, with MER greater than 40 dB, signal shoulder less than -60dBc, spurious inside and outside adjacent channel less than -55dB and -61 dB respectively, and superior phase noise performance.
6)Use adaptive output impedance matching technology to ensure impedance matching at the output end.
7)Support system-level AGC (automatic gain control) function to ensure the output power stability of the transmission system.
8)Real-time, continuous, automatic and high accuracy measurement of  MER and shoulder level of final-stage PA system without additional hardware overhead, and provide local display, serial ports / network transmission function for remote M&C, greatly facilitate the on-site monitoring of the transmitted signal and provides a good foundation for unattended transmission system.
9)In MFN mode, it has the following superior functions: real-time input stream rate display, built-in bit rate adaptive module, and high-precision PCR correction.
10)Real-time monitoring and display of the temperature inside the machine, as well as over-temperature protection.
11)Rich, intuitive and open user interface, supporting RS485 external control interface and provide a complete portfolio of communication protocols to facilitate the integration of transmission system.
12)Support remote upgrade via RJ45 port to complete the exciter system upgrades.