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Specifications
ISDB-T digital modulatorFully compliant to ARIB STD-B31 (ISDB-T)
both SFN and MFN
linear/non-linear adaptive digital pre-di
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
10.Constant temperature crystal oscillating and excellent frequency stability (reach up to 0.1ppm)
11.LCD display, keyboard and SNMP software operation
Specifications
Input | 4 ASI input, hot backup, BNC interface | ||
GPS 10MHz reference clock input, BNC interface | |||
GPS 1PPS input, BNC interface | |||
1 RF input for DPD -25dbm~+5dbm | |||
Modulation | Standard | ARIB STD-B31 | |
Mode | mode 1(2k), mode 2(4k), mode 3(8k) | ||
Constellation | DQPSK, QPSK, 16QAM, 64QAM | ||
External coding | RS (204,188) | ||
Internal coding | Convolution (1/2, 2/3, 3/4, 5/6, 7/8) | ||
Guard interval | 1/4, 1/8, 1/16, 1/32 | ||
Hierarchy mode | A,A+B,A+B+C | ||
Time domain interlacing | mode 1: 0, 4, 8, 16 mode 2: 0, 2, 4, 8 mode 3: 0, 1, 2, 4 | ||
Bandwidth | 6MHz, 7MHz, 8MHz | ||
RF Out | Connector | N Type, 50ΩImpedance | |
RF range | 30~960Mhz,1Hz step | ||
Output level ATT | -26dbm~+3dbm,0.1db step | ||
MER | ≥ 42db | ||
Non-linear DPD | over 10db ACPR improvement (normally) | ||
linear DPD | over 10db non-flatness adjustment(normally) | ||
System | LCD display, keyboard and SNMP operation | ||
Supporting software upgrading through network | |||
General | Demission (W*L*H) | 440mm×414mm×44.5mm | |
Weight | 4.9kg | ||
Temperature | 0~45°C(operation),-20~80°C(storage) | ||
Power supply | AC 100V~240V,50/60Hz | ||
Consumption |
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Principle chart
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