hd dvb-t module

4 channels HDMI in, 1*ASI in MPEG2 HD/MPEG4 HD video encoding 2*RF DVB-T(or 4* ATSC) out 2 (or 4)carriers combined output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NDS3542 MPEG2 HD/MPEG4 HD Encoder Modulator 

Product overview

NDS3542 series products are one branch of DEXIN’s knock-out all-in-one devices which integrate tuning (DVB-S/S2, ISDB-T) or encoding (MPEG-2, MPEG-4/AVC H.264) and modulation (DVB-C, DVB-T/T2, ISDB-T, or ATSC) to convert V/A signals into RF output. This sheet is going to introduce a 1U rack model which integrates MPEG-2 HD/MPEG-4 HD encoding and DVB-Tmodulation to convert 4 HDMI channels A/V signals to DVB-TRF out in the frequency range of 30~960MHz.

It adopts inner drawer-type structural design which greatly facilitates the change of encoding modules (HDMI/CVBS/SDI/YPbPr/…) as needed. To meet customers’ various requirements, NDS3542 is also equipped with 1 ASI input, and output with 2 ASI ports and 1 UDP IP port.

The signals source could be from satellite receivers, closed-circuit television cameras, Blue-ray players, and antenna etc. Its output signals are to be received by TVs, STB and etc with corresponding standard.

With its various inputs available, our NDS3542 series products are wildly used in public places such as metro, market hall, theatre, hotels, resorts, and etc for advertising, monitoring, training and educating in company, schools, campuses, hospital… It’s a good choice to offer HD channels and more.  

Key Features

 

 MPEG2 HD/MPEG4 HD video encoding

 Up to 1920*1080@50I/60I supported(MPEG2 HD)

 4* HDMI in, 1*ASI in

 2*RF DVB-T out (2 carriers combined output), double output bandwidth

 LCN support (Logical Channel Number)

 Excellent modulation quality MER≥42dB

 RF Frequency range 30Mhz~960Mhz

 LCD display, Remote control and firmware

 Updates via web

 Lowest cost per channel --- breakthrough price

 

Principle chart

 

 

 

 

Specification

Encoding section

Video

Encoding	MPEG2 HD/MPEG4 HD
Input	HDMI*4
Resolution	1920*1080_60i, 1920*1080_50i, 1280*720_60p, 1280*720_50P

Audio

encoding	MPEG1 Layer II, MPEG2-AAC, MPEG4-AAC
Sample rate	48KHz
Bit rate	64kbps, 96kbps,128kbps, 192kbps, 256kbps, 320kbps

 

DVB-T Modulator Section

 

Standard	EN300744
FFT mode	2K, 8K
Bandwidth	6M, 7M, 8M
Constellation	QPSK, 16QAM, 64QAM
Guard Interval	1/4, 1/8, 1/16, 1/32
FEC	1/2, 2/3, 3/4, 5/6, 7/8
MER	≥42dB
RF frequency	30~960MHz, 1KHz step
RF out	2*RF COFDM DVB-T out (2 carriers combined output); Double output bandwidth
RF output level	-30~ -10dbm (81~97 dbµV), 0.1db step

 

 

ATSC Modulator Section

Standard	ATSC A/53
Constellation	8 VSB
RF Output Level	26~-10dbm (81~97dbµV), 0.1db step
RF out	4*RF COFDM ATSC-T out (4 carriers combined output)
MER	≥42dB
RF frequency	30~960MHz, 1KHz step

 

System

Local interface	LCD + control buttons
Remote management	Web NMS
output	ASI out (BNC type); IP out (RJ45, 100M)
NMS interface	RJ45, 100M
Language	English

 

General

Power supply	AC 100V~240V
Dimensions	482*300*44mm
Weight	4.5 kgs
Operation temperature	0~45°C

Why do we need 2 x DVB-T (or 4 ATSC-T) carrier output in one device?

Firstly, it is to guarantee the sound picture quality of HD programs.

As we all know, to guarantee the picture quality of 1920x1080@50I/60I resolution HD program, the video bit-rate may exceed 10Mbps, even up to 15Mbps. However, the maximum possible bit-rate output for single DVB-T carrier is only around 30Mbps.

15Mbps x4channel =60Mbps > 30Mbps.

It means the single DVB-T carrier simply can't carry the 4 channels 1080i HD programs if the average bit-rate reaches 15Mbps.

That's why we design 2*DVB-T carrier modulation board which double the maximum possible bit-rate bandwidth up to 60Mbps, which rightly makes it reliably carry 4 channels HD programs output simultaneously.

Below brief chart will help to more clearly illustrate the working principle.

Secondly, it is cost-saving.

Its high integration allows users to transmit more programs with fewer devices. It undoubtedly saves the cost for you and me.

hd dvb-t module