DVB-T2 QPSK Modulator
Model No: GQ-3800B
Product Overview
GQ-3800B is a highly reliable single channel DVB-T2 modulator launched by GOSPELL, which is compliant with the EN 302 755(DVB-T2) and EN 302 755 version 1.3.1(T2-Lite, option) standards, and is designed for digital terrestrial distribution by DTT network operators and TV broadcaster.
GQ-3800B combines dual redundant ASI and Gigabit IP input interfaces, for seamless switching between primary and slave interfaces that can greatly improve the stability and reliability of terrestrial distribution networks. It supports T2 modulator interface (T2-MI) over ASI or IP input, which comes from DVB-T2 gateway, suitable for MFN or SFN- networking.
The GQ-3800B features a state-of-the-art linear / non linear digital pre-correction that optimizes DTT transmitter performance and efficiency. It offers a wide range of UHF band DVB-T2 RF modulation output (470MHz to 860MHz) and various transmission and modulation modes, such as MFN, SFN, SISO, MISO, SPLP and MPLP. Moreover, it supports Web and SNMP based management and control for local and remote parameters configuration and status monitoring.
Main Features
· Complies with DVB-T2 and T2- Lite (software option) standards
· Supports data input in T2-MI or MPEG-TS format
· Supports SFN/MFN
· Supports Single / Multiple Input Single Output (SISO/MISO)
· Enhanced Digital Adaptive Pre-correction
· Supports linear / non linear Digital Adaptive Pre-correction, optional enhanced DAP
· Dual ASI and IP input, supporting independent or 1+1 hot redundant(seamless switch)
· QPSK/16QAM/64QAM/256QAM(standard or rotated) mode
· Multiple signal bandwidth can be supported: 5M,6M,7M,8MHz
· Modulation RF output level up to 0dBm
· Supports PAPR adjustment for output signal
· Modulation module is designed based on FPGA to ensure the stability of device
· Adopt extra large cache memory for both uniform and burst input stream
· Self adaptive filter circuit design ensures outstanding out-of-band rejection
· Supports Web/SNMP-based network management and monitoring, online upgrade of firmware
Technical Specifications
| ASI Transport Stream Input | ||
| Numbers of Input | 2 x ASI Input | |
| Connector Type | BNC (Female, 75Ω) | |
| Input Bit Rate | 0 to 80Mbps each | |
| Standards | TS 102 831, EN 102 773(T2-MI) | |
| Data Format | MPEG-TS(188/204 Bytes) or T2-MI | |
| Operation Mode | 1+1 hot redundancy(seamless switch) | |
| Ethernet Input | ||
| Numbers of Input | 2 x 100/1000 Base-T Ethernet Input | |
| Connector Type | RJ-45 | |
| Supported Protocols | IP, RTP, UDP, IGMP (V2 & V3) | |
| VLAN ID | 0 to 4095(IEEE 802.1q) | |
| Encapsulation & FEC | SMPTE-2022 | |
| Data Format |
MPEG-TS-over- IP/UDP/RTP(7 x 188Bytes ) or T2-MI-over-IP/UDP/RTP |
|
| Operation Mode | 1+1 hot redundancy (seamless switch) | |
| Clock & Synchronization | ||
| External Clock & Sync. |
1 x 1PPS In (BNC, 50Ω) 1 x 10MHz In (BNC, 50Ω) 1 x TOD In (DB-9) |
|
| Internal GPS Module | Optional built-in GPS or GPS / Glonass module | |
| 1 x GPS In(BNC, 50Ω, with 3.3V DC feed for external GPS antenna) | ||
| Operation Mode | Reference clock redundant management | |
| Internal Clock | Default internal 10MHz clock | |
| Digital Pre-correction | ||
| Linear Pre-correction | 1 x FBA input | |
| RF feedback signal from amplifier output | ||
| Non-Linear Pre-correction | 1 x FBF input | |
| RF feedback signal from filter output | ||
| Connector | BNC, 50Ω | |
| Pre-correction Mode |
Digital Adaptive Pre correction(DAP) Enhanced DAP (software option) |
|
| Modulation Output | ||
| Interface |
1 x RF Output 1 x -20dB RF Output(Test Port) |
|
| Connector Type | F-Type (Female, 75Ω) | |
| RF Frequency Range | 470 to 862 MHz (1Hz step size, 0.2Hz accuracy) | |
| Bandwidth | 5MHz, 7MHz, 8MHz | |
| Transmission Mode | MFN, SFN-SISO, SFN-MISO | |
| Modulation Mode | System A, System B, Multi-PLP | |
| Constellations |
QPSK, 16/64/256 QAM (standard or rotated mode) |
|
| Carriers | 1k, 2k, 4 k, 8k, Extended 8k, 16k, Extended 16k,32k, Extended 32k | |
| Protection Interval | 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 | |
| RF Output Power Level |
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