DVB-T TRANSMITTER STANDARD

DVB-T TRANSMITTER STANDARD

TECHNICAL CHARACTERISTICS TV Standard                         DVB-T Power output             XX  kW Channel E XX UHF Hierarchical constellation 16QAM, 64QAM Non Hierarchical constellation QPSK, 16QAM, 64QAM Modulator Input - DVB-SPI Synchronous Parallel Interface (SPI), using DB-25 female     connector – LVDS, two Asynchronous Parallel Interfaces (ASI) BNC 75Ω.    Seamless switching between the inputs. - SFN adapter including MIP decoder for automatic modulator     configuration via data Frequency Reference Stand-alone 10 MHz OCXO for MFN; Intreface for external GPS receiver or internal GPS receiver (optional) for SFN. Input Data Rate Ranging from 4.98 Mbps to 31.67 Mbps depending on selected operating mode in SFN mode. Bit rate adaptation and PCR restamping in MFN mode (Constant input bit rate) Inner Code Rates 1/2; 2/3, 3/4, 5/6, 7/8 Punctured convolutional. IFFT Mode 2k, 8k Guard Intervals 1/4, 1/8, 1/16, 1/32 of symbol duration Frequency Stability with GPS receiver: 5x10 E-11 / long term; without GPS receiver: 1.5x10 E-7/year Frequency Step 1 Hz Amplitude-frequency response ± 0.5 dB (excluding output filter) Group delay ± 50 nsec (excluding output filter) SSB Phase noise -90 dBc/Hz at 1 KHz Test Signals PRBS (Pseudo Random Binary Sequence), ramp, packetized ramp, null packet Monitoring Outputs Local Oscillator, IF output, RF output Network Mode SFN  MFN TX Output connector 7/8” EIA Flange below 1 kW 1 5/8” EIA Flange for 1 –  5 kW 3 1/8” EIA Flange for 5 – 15 kW Control interface - Front panel (LCD display and cursor/ execute keys) - R HW interface - S232 interface D 9 - Ethernet Interface RJ 46 Harmonic & spurious < 60 dB Cooling system - Inside TX cabinet Air cooling system below 2 kW - Liquid cooling above 2 kW Operating voltage 220 VAC for single phase +/- 10% 380 VAC for three phase +/- 10%