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HDTV Encoder Modulators



4 Ch HD-SDI to QAM, ASI & IP HD Encoder RF Modulator

Tech Specs
Application Drawing

B-QAM-SDI-IP-4CH-LL  series products are QuetTel’s new breakthrough all-in-one devices which integrate encoding (MPEG-2 HD, MPEG-4/AVC H.264) and modulating to convert signals into DVB-C/DVB-T/ATSC-T/ISDB-T RF output. It has equipped with 4 HD-SDI channels input and 1 ASI input and output with 2 ASI ports and 1 UDP IP (4*SPTS) port.
It adopts inner drawer-type structural design which greatly facilitates the change of encoding modules (SDI/HDMI) 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 TVs or STBs and etc.
With its various inputs available, our B-QAM-SDI-IP-4CH-LL series products are wildly used in public places such as the 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.

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4 Ch HD-SDI  to  QAM, ASI & IP HD Encoder RF Modulator

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    • MPEG2 & MPEG4 AVC/H.264 HD/SD encoding
    • Huge video buffer (for SDI interface), free to switch video sources
    • MPEG1 Layer II, MPEG2-AAC, MPEG4-AAC, AC3 2.0 (Optional) audio encoding
    • Up to 1920*1080@50P/60P supported (MPEG4 AVC/H.264)
    • Up to 1920*1080@50I/60I supported (MPEG2 HD)
    • 4* HD-SDI or HDMI inputs
    • 1*ASI input for re-mux; 1*RF input for mix
    • Support CC (closed caption ) for SDI interface
    • Simultaneously encoding each channel more than 10Mbps
    • 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
Tech Specs
Encoding Section
Video Encoding MPEG2; MPEG4 AVC/H.264
Interface x4 SDI(BNC)
Resolution SDI: 1920*1080_60p, 1920*1080_50p

(For MPEG 4 AVC/H.264 only),

1920*1080_60i, 1920*1080_50i,

1280*720_60p, 1280*720_50p

720*576_50i, 720*480_60i

Low Delay Normal, Mode 1, Mode 2
Audio Encoding MPEG1 Layer II; MPEG2-AAC; MPEG4-AAC; DD AC3(2.0)
Sample rate 48KHz
Bit rate 64/96/128/192/256/320kbps


B-QAM-SDI-IP-4CH-LL Digital Encoder Modulator  Pdf User Manual: B-QAM-SDI-IP-4CH-LL


CATV QAM Channel Center Frequency  CATV QAM Channel Center Frequency 


RF Section
MER ≥42dB
RF frequency 30~960MHz, 1KHz step
RF output level -30~ -10dbm (77~97 dbµV), 0.1db step
DVB-C Modulator Section 
Standard J.83A(DVB-C) J.83B J.83C
Constellation 16/32/64/128/ 256 QAM 64/ 256 QAM 64/ 256 QAM
Bandwidth 8M 6M 6M
RF Out 4*DVB-C adjacent carriers combined output
Symbol rate 5.000~9.000Msps adjustable
ATSC Modulator Section
Standard ATSC A/53
Constellation 8 VSB
RF Out 4*ATSC adjacent carriers combined output
Local interface LCD + control buttons
Remote management Web NMS
Stream Out 2 x ASI out (BNC type, 100M);

4 x IP SPTS out (RJ45, 100M)

NMS interface RJ45, 100M
Power supply AC 100V~240V
Dimensions 420*400*44mm
Weight 4.5 kg
Operation  temperature 0~45℃



Disclaimer: Products, specifications and data are subject to change without notice, to improve reliability, function, design or otherwise.

QuestTel shall have no liability for any error or damage of any kind resulting from the use of this document.
Application Drawing 4 Ch HD-SDI  to  QAM, ASI & IP HD Encoder RF Modulator's Application Drawing
QuestTel Quality - Guaranteed

The QuestTel's Quality System is an integral part of the management methodolgy of the organization and is designed to enhance and perpetuate the reputation of the Company as a designer and manufacturer of reliable quality Broadcast Systems products.



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