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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) |
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Constellation |
DQPSK, QPSK, 16QAM, 64QAM |
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External coding |
RS (204,188) |
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Internal coding |
Convolution (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 |
|
RF range |
30~960Mhz,1Hz step |
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Output level ATT |
-26dbm~+3dbm,0.1db step |
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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 display, keyboard and SNMP operation |
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Supporting software upgrading through network | |||
General |
Demission (W*L*H) |
440mm×414mm×44.5mm |
|
Weight |
4.9kg |
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Temperature |
0~45°C(operation),-20~80°C(storage) |
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Power supply |
AC 100V~240V,50/60Hz |
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Consumption |
|
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Principle chart
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