NDS3542A low latency 4HD to DVB-C modulator
USD $1 - $2,000 /Set
Min.Order:1 Set
Dexin Digital Technology Corp. Ltd. (Chengdu)
NDS3542A low latency 4HD to DVB-C modulator
4HDMI to DVB-C
4SDI to DVB-C
Product overview
NDS3542A series products are DEXIN’s new breakthrough all-in-one devices which integrate encoding (MPEG-2 HD/SD, MPEG-4/AVC H.264 HD/SD) and modulating to convert V/A signals into DVB-C RF output. It has equipped with 4 HDMI (4 SDI optional) channels input and 1 ASI input and output with 2 ASI ports and 1 UDP IP (4*SPTS) port.
Delay problem has been greatly reduced to achieve an extremely low value from the encoding progress to the decoding terminals.
It adopts inner drawer-type structural design which greatly facilitates the change of encoding modules (HDMI/SDI /…) as needed.
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 DVB-C TVs or STBs and etc.
Key Features
* MPEG2 & MPEG4 AVC/H.264 HD/SD encoding
*Up to 1920*1080@50P/60P supported (MPEG4 AVC/H.264)
*Up to 1920*1080@50I/60I supported (MPEG2 HD)
* 4* HDMI/SDI input
*1*ASI input for re-mux; 1*RF input for mix
*Simultaneously encoding each channel more than 10Mbps
*4* DVB-C RF out (4 carriers combined output)
*Support 4 * SPTS output
*Extremely low delay
* LCN support (Logical Channel Number)
* Excellent modulation quality MER≥42dB
* RF Frequency range 30Mhz~960Mhz
* LCD display, Remote control and firmware
* Web NMS management; Updates via web
* Lowest cost per channel
Principle chart
Specifications
Encoding section
Video
Encoding | MPEG2, MPEG4 AVC/H.264 |
Input | HDMI*4 (or SDI*4) |
Resolution | 1920*1080_60P, 1920*1080_50P, (-for MPEG4/H.264 only) 1920*1080_60i, 1920*1080_50i, 1280*720_60p, 1280*720_50P 720*480_60i, 720*576_50i |
Audio
encoding | MPEG1 Layer II, MPEG2-AAC, MPEG4-AAC |
Sample rate | 48KHz |
Bit rate | 64kbps, 96kbps,128kbps, 192kbps, 256kbps, 320kbps |
DVB-C Modulator Section
Standard | J.83A , J.83B, J.83C |
MER | ≥42dB |
RF frequency | 30~960MHz, 1KHz step |
RF output level | -30~ -10dbm(81~97 dbµV), 0.1db step |
J.83A |
|
Constellation | 16/32/64/128/256QAM |
Symbol rate | 5.000~9.000Msps adjustable |
bandwidth | 8M |
J.83B |
|
Constellation | 64QAM/ 256QAM |
bandwidth | 6M |
J.83C |
|
Constellation | 64QAM/ 256QAM |
bandwidth | 6M |
System
Local interface | LCD + control buttons |
Remote management | Web NMS |
output | ASI out (BNC type); 4*SPTS out (RJ45, 100M |
NMS interface | RJ45, 100M |
Language | English |
General
Power supply | AC 100V~240V |
Dimensions | 482*400*44mm |
Weight | 4.5 kgs |
Operation temperature | 0~45°C |
Why do we need 4 x DVB-C 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 and even reach up to 15Mbps. However,
when the modulating constellation is 64QAM, the maximum possible bit-rate output for single DVB-C carrier is only around 20Mbps.
15Mbps x4 =60Mbps > 20Mbps.
It means the single DVB-C carrier simply can't carry the 4 channels 1080i HD program if the average bit-rate exceeds 10Mbps.
That's why we design 4*DVB-C carrier modulation board which quadruples the maximum possible bit-rate bandwidth up to 80Mbps and above when 64QAM constellation is used. This rightly makes it reliably carry 4 channels MPEG2 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.
About Dexin Digital Technology Co.,Ltd