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HDTV Encoder Modulators



2Ch HDMI & YPbPr, CVBS to QAM/ATSC, ASI & IP HD Encoder RF Modulator

Tech Specs
Application Drawing

All-in-one 2 Channel Full HD Compact Encoder Modulator which integrates encoding MPEG-2, MPEG-4/H.264 modulation to convert HDMI/YPbPr /CVBS signals to digital RF output. To meet customers various requirements the B-QAM-HDMI-IP-2CH is also equipped with 1 ASI input and 2 ASI output ports. In addition, two ethernet network ports are provided, one for configuration (NMS GUI) and a second for IPTV output.  The B-QAM-HDMI-IP-2CH is ideal solution to distribute 2 SD or HD 720p / 1080i / 1080p Video Signals to an unlimited number of HD Television over the existing coax cables. QuestTel Encoder/Modulator capable of modulating both standards QAM and ATSC, using the NMS GUI. QuestTel's Encoder Modulator series products are wildly used in public places such as the metro, market hall, theatre, hotels, restaurants and etc for advertising, monitoring, training and educating in company, schools, campuses, hospitals.

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2Ch HDMI & YPbPr, CVBS to QAM/ATSC, ASI & IP HD Encoder RF Modulator

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Questtel 2Ch HDMI modulators are designed to convert HDMI signals, composite and component video feeds to RF QAM signals. These can then be distributed to an unlimited number of TV sets (via coaxial cable). High quality H264 and MPEG2 circuitry provide flawless HD video encoding. When in conjunction with QAM and ATCS processors they enhance 1B-HDMI-QAM-2CH units; providing the best solution for affordable coax video distribution. These units feature IPTV output, allowing you to stream live video over IP. 1B-HDMI-QAM-2CH is equipped with NMS GUI. This enables easy setup and remote control via any web-browser over LAN network. This solution is ideal for live video streaming and HD cable television applications.
    • MPEG2 HD & MPEG4 AVC H.264 HD video encoding

    • DD AC3 (2.0), MPEG4-AAC, MPEG2-AAC, MPEG1 Layer II audio encoding 

    • Support DD AC3 (2.0/5.1/7.1) passthrough 

    • Support AC3 Dialog Normalization 

    • 2x HDMI/YPbPr/CVBS  channels in 

    • 1xASI in for re-mux; 1xRF in for RF mix 

    • 2x DVB-C & 4 ATSC RF out in one device   ( DVB-C & ATSC modulation dynamic switching)

    • 2 separate ASI output to mirror MPTS or one carrier programs; 

    • IP (2xSPTS & 1xMPTS) out 

    • Support CC (Closed Caption) EIA608 

    • Low Latency available 70 -120 ms

    • LCN (Logical Channel Number) support 

    • Supports IPTV output in UDP format for unicast or multicast
    • VCT (Virtual Channel Table) support 

    • Excellent modulation quality 

    • LCD display, Remote control and firmware

    • Web-based NMS management; Updates via web

    • All cables included in the box

Tech Specs
Encoding Section
Video Encoding MPEG2; MPEG4 AVC/H.264
Interface x2 HDMI/CVBS/YPbPr(RCA)
Resolution HDMI: 1920*1080_60p, 1920*1080_50p

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

YPbPr: 1920*1080_60i, 1920*1080_50i,

1280*720_60p, 1280*720_50p

CVBS: 720*576_50i, 720*480_60i

Aspect Ratio 4:3; 16:9
Audio Encoding MPEG1 Layer II; MPEG2-AAC; MPEG4-AAC; DD AC3(2.0);

DD AC3 (2.0/5.1/7.1) passthrough

Interface x2 HDMI/SPDIF (x2 Stereo/x4 Mono)
Sample rate 48KHz
Bit rate 64/96/128/192/256/320kbps


B-QAM-HDMI-IP-2CH Digital Encoder Modulator  Pdf User Manual: B-QAM-HDMI-IP-2CH

CATV QAM Channel Center Frequency  CATV QAM Channel Center Frequency 

B-QAM-HDMI-IP-2CH HDMI Encoder Modulator Promo  B-QAM-HDMI-IP-2CH Promo Page 

RF Section
MER ≥43dB
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 2*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 2*ATSC adjacent carriers combined output
Local interface LCD + control buttons
Remote management Web NMS
Stream Out 2 ASI out (BNC type, 100M);

IP (2* SPTS&1*MPTS) over UDP out (RJ45, 100M)

NMS interface RJ45, 100M
Power supply AC 100V~240V
Dimensions 333*232*44mm
Weight 2.5 kg
Operation  temperature 0~45℃


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

Application Drawing 2Ch HDMI & YPbPr, CVBS to QAM/ATSC, 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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