Specifications
ISDB-T (ARIB STD-B31) and ISDB-TB standard
4 ASI in, 1 RF in, 10MHz ref-clock and 1PPS input
adaptive digital pre-distortion
Outline
NDS2405C ISDB-T modulator is developed to adapt Japan, Brazil, Argentina and other South American country’s terrestrial digital television. The modulator's channel encoding and modulation mode is fully complying with the ARIB STD-B31 standard. This ISDB-T modulator supports four ASI hot backup input, single frequency network, and multi-frequency network. In order to improve the output performance of the transmitter, this ISDB-T modulator also simultaneously supports adaptive linear and nonlinear digital pre-distortion, layered transmission and three transmission modes. Furthermore, this device can be upgraded and controlled through network system, which can be widely used in ISDB-T digital broadcasting network's setting up and set-top box design's production and test.
Features
1.Fully complying with ISDB-T (ARIB STD-B31) and ISDB-TB standard
2.4 ASI in, 1 RF in, 10MHz reference clock and 1PPS in
3.Layered transmission with A, A+B, A+B+C hierarchy modes
4.ISDB-T BTS input (with IIP packet), support single frequency and multi-frequency network
5.Three transmission modes: mode1(2k), mode2(4k), mode3(8k)
6.Supports adaptive linear digital pre-distortion (DPD)
7.Supports adaptive non-linear digital pre-distortion (DPD )
8.MER≥42db
9.RF output range: 30~960MHz with 1Hz step
- Constant temperature crystal oscillating and excellent frequency stability (reach up to 0.1ppm)
- LCD display, keyboard and SNMP software operation
Specifications
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Input
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4 ASI input, hot backup, BNC interface
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GPS 10MHz reference clock input, BNC interface
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GPS 1PPS input, BNC interface
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1 RF input for DPD -25dbm~+5dbm
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Modulation
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Standard
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ARIB STD-B31
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Mode
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mode 1(2k), mode 2(4k), mode 3(8k)
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Constellation
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DQPSK, QPSK, 16QAM, 64QAM
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External coding
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RS (204,188)
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Internal coding
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Convolution (1/2, 2/3, 3/4, 5/6, 7/8)
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Guard interval
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1/4, 1/8, 1/16, 1/32
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Hierarchy mode
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A,A+B,A+B+C
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Time domain interlacing
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mode 1: 0, 4, 8, 16 mode 2: 0, 2, 4, 8
mode 3: 0, 1, 2, 4
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Bandwidth
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6MHz, 7MHz, 8MHz
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RF Out
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Connector
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N Type, 50ΩImpedance
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RF range
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30~960Mhz,1Hz step
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Output level ATT
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-26dbm~+3dbm,0.1db step
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MER
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≥ 42db
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Non-linear DPD
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over 10db ACPR improvement (normally)
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linear DPD
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over 10db non-flatness adjustment(normally)
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System
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LCD display, keyboard and SNMP operation
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Supporting software upgrading through network
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General
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Demission (W*L*H)
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440mm×414mm×44.5mm
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Weight
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4.9kg
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Temperature
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0~45°C(operation),-20~80°C(storage)
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Power supply
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AC 100V~240V,50/60Hz
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Consumption
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Principle chart
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