Specifications

ISDB modulator
Fully compliant to ARIB STD-B31 (ISDB-T)
both SFN and MFN
linear/non-linear adaptive digital pre-distortion

ISDB modulator

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

 

 Principle chart