Outline
XLD2405C 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
* Fully complying with ISDB-T (ARIB STD-B31) and ISDB-TB standard
* Support 4 ASI, 1 RF, 1 external GPS 10MHz clock and 1PPS, 1RF input
* Layered transmission with A, A+B, A+B+C hierarchy modes
* Supports TS input(one Layer only) and ISDB-T BTS input(up to 3 Layers)
* Support MFN and SFN
* Support up to 3 transmission modes: mode1(2k), mode2(4k), mode3(8k)
* Supports adaptive linear digital pre-distortion (DPD)
* Supports adaptive non-linear digital pre-distortion (DPD )
* Excellent RF performance, MER≥42db
* RF output frequency range: 30~960MHz with 1Hz step
* Constant temperature crystal oscillator, as high as 0.1ppm stability
* LCD/Keyboard and net management(SNMP)
Specifications
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Input |
4 ASI input, hot backup |
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1external GPS 10MHz clock and 1pps input for SFN |
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1 RF input for DPD -25dbm~+5dbm |
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Modulation |
Standard |
ARIB STD-B31 |
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Transmission mode(FFT) |
mode 1(2k), mode 2(4k), mode 3(8k) |
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Constellation |
DQPSK, QPSK, 16QAM, 64QAM |
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External coding |
RS (204，188) |
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FEC rate |
1/2, 2/3, 3/4, 5/6, 7/8 |
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Guard interval |
1/4, 1/8, 1/16, 1/32 |
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Hierarchy mode |
A、A+B、A+B+C |
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Time domain interlacing |
mode 1: 0, 4, 8, 16 mode 2: 0, 2, 4, 8 mode 3: 0, 1, 2, 4 |
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Bandwidth |
6MHz, 7MHz, 8MHz |
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RF Out |
Connector |
N Type, 50ΩImpedance |
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RF range |
30~960Mhz，1Hz stepping |
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Output level |
-26dbm~+3dbm，0.1db stepping |
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MER |
≥ 42db |
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Non-linear DPD |
over 10db ACPR improvement (normally) |
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linear DPD |
over 10db non-flatness adjustment(normally) |
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System |
LCD/keyboard and net management (SNMP) |
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Supporting software upgrading through network |
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General |
Demission (W*L*H) |
440mm×414mm×44.5mm |
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Weight |
4.9kg |
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Temperature |
0~45℃(operation),-20~80℃(storage) |
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Power supply |
AC 100V~240V,50/60Hz |
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Consumption |
35W |
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Principle chart
