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HDTV Encoder Modulators



1 Ch HDMI, YPbPr & CVBS to QAM HD Encoder RF Modulator

Tech Specs
Application Drawing

QuestTel's all-in-one 1 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. The B-QAM-HDMI-1CH is ideal solution to distribute HD 720p / 1080i / 1080p Video Signals to an unlimited number of HD Television over the existing coax cables. QuestTel Encoder/Modulator capable of modulating QAM DVB-C or DVB-T or ATSC. Also our 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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1 Ch HDMI, YPbPr & CVBS to QAM HD Encoder RF Modulator

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    • MPEG-2, MPEG-4 AVC/H.264 HD video encoding

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

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

    • 1* HDMI/YPbPr/CVBS  channels in 

    • 1*RF in for RF mix 

    • 1* DVB-C/DVB-T/ATSC /ISDB-T (Optional) - RF out in one device 

    • Video recording and playback through a USB

    • LCN (Logical Channel Number) support 

    • VCT (Virtual Channel Table) support 

    • Excellent modulation quality 

    • LCD display and buttons control

Tech Specs
Encoding Section
Video Encoding MPEG-2, MPEG-4 AVC/H.264
Interface x1 HDMI/CVBS/YPbPr

HDMI: 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

CVBS: 720x576_50i (PAL);720x480_60i (NTSC)

YPbPr: 1920*1080_60i, 1920*1080_50i;1280*720_60p, 1280*720_50p

Bit rate 0.500~19.500 Mbps
Audio Encoding MPEG1 Layer II, MPEG2-AAC, MPEG4-AAC, DD AC3 2.0 AC3 Passthrough
Interface HDMI/1 Stereo /2 mono
Sample rate 48KHz
Bit rate 64, 96,128, 192, 256, 320, 384kbps


B-QAM-HDMI-1CH Digital Encoder Modulator  Pdf User Manual: B-QAM-HDMI-1CH

CATV QAM Channel Center Frequency  CATV QAM Channel Center Frequency 


RF Section
MER ≥42dB
RF frequency 30~960MHz, 1KHz step
RF output level -16~ -36 dBm (71~91 dbµV), 0.1db step
DVB-C Modulator Section
Standard J.83A (DVB-C)  / J.83B / J.83C
Constellation 16/32/64/128 /256 QAM
Bandwidth 6-8M
Symbol rate 5000-9000 Ksps
DVB-T Modulator Section (Option)
Standard DVB-T COFDM
Constellation QPSK, 16QAM, 64QAM
Bandwidth 6M, 7M, 8M
Code rate 1/2, 2/3, 3/4, 5/6, 7/8.
Guard Interval 1/32, 1/16, 1/8, 1/4
Transmission Mode: 2K, 8K
ATSC Modulator Section (Option)
Standard ATSC A/53
Constellation 8VSB
ISDB-T Modulator Section (Option)
Standard ARIB STD-B31
Constellation DQPSK,QPSK, 16QAM, 64QAM
Bandwidth 6M
Guard Interval 1/32, 1/16, 1/8, 1/4
Transmission Mode 2K, 4K, 8K
Management Local control: LCD + control buttons
LCN Insertion yes
Power supply DC 12V
Dimensions 144x238x52mm
Weight Approx 1kg
Operation temperature 0~45°C


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 1 Ch HDMI, YPbPr & CVBS to QAM HD Encoder RF Modulator's Application Drawing
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