Q2 main  

Q2 Encoder-Modulator

IP Modulator





Q2 main  

Q2 Encoder-Modulator

IP Modulator






Q2 is a flexible encoding&modulating board combination of encoder modulator and transmodulator, this AV/HDMI/RF to RF Modulators headend units are an ideal product to create your own digital TV channels over existing coax. The channel sources from any RF tuner, AV and HDMI devices can be easily distributed to all your televisions quickly and efficiently, and the best quality SD/HD picture allows you to broadcast any AV/HDMI/RF device into your RF modulated channel at the lowest cost per channel.

Q2 is an all-in-one device integrated encoding (MPEG-2/ H.264 /H.265), multiplexing and modulation functions in one standard 1 Ru case. It has total 6 module, each module can support 4 tuner or 4 AV/ HDMI input, total up to 8 RF output. In a word, it can convert AV/HDMI and RF signals input to RF out. It is also equipped with ASI ports to input and output, and IP port to output TS. Its flexible configuration is making it extremely scalable, reliable with high performance.

Q2 is an efficient, low-cost digital TV headend device, which can be used in public place such as metro, market hall, theatre, hotels, resorts for advertising. It also can be used for monitoring, training and educating in company, campus, hospital.

Key Features

  • Distribute 8/12/16/20/24 FTA Tuners, SD or HD contentover RF to an unlimited number of TVs
  • flexible encoding&modulating board combination
  • Selectable DVB-S2, ISDB-T, DVB-C, DVB-T/T2, DTMB,ATSC free to air Tuners inputs
  • Optional DVB-C (QAM), DVB-T (COFDM), ATSC-T, ISDB-T,DTMB Modulation, 4*Carrier RF Out, (8/12*Carrier RFOut optional)
  • MPEG-2 encoding supported in AV input
  • H.264/H.265 (optional) encoding supported in HDMIinput
  • In modulation Mode, support 128*IP input
  • Two separate ASI input for External TS Multiplexing
  • Simulaneously 1*MPTS and N*SPTS over UDP/RTP IPout in modulation mode
  • Simulaneously 4*MPTS and N*SPTS over UDP/RTP IPout in encoder mode
  • 4 separate multiplexing and Up-converter modulatingadjacent carrier out
  • Selectable the Value of PCR PID same as Video PID
  • LCN (Logical Channel Number) support
  • Support TTL editing
  • PSI/SI editing & inserting
  • PID Remapping & Filtering
  • Selectable LOGO,QR code,OSD insertion for every, Allor Each module of local channel
  • Support PCR correct and PCR interval adjusting
  • Easy-to-Use System Management via Web



FTA Tuners Inputs Part

FTA Tuner Module

Numbers of Boards

4 Tuners ports per module

Up to 6 Modules in Back panel

Numbers of Ports 8; 12; 16; 20; 24 Channels


DVB-S/S2 Tuners

F-female type
Input Frequency 950-2150Mhz
Symbol rate

2~45Mbauds(DVB-S QPSK)

1~45Mbauds(DVB-S2 QPSK)

2~30Mbauds(DVB-S2 8PSK)

Signal Strength - 65 ~ -25dBm
FEC Demodulation

1/2, 2/3, 3/4, 5/6, 7/8(DVB-S QPSK)

1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10


Roll Off 0.20; 0.25; 0.35(Only DVB-S)
Demodulation Mode QPSK, 8PSK(Only DVB-S2)

LNB Polarity Selection Vol 0, 13V, 18V Selectable

LNB Band Selection Tone 0/22Khz Selectable

Input Impedance 75 Ω
FEC (Code Rate) 1/2, 2/3, 3/4, 5/6, 7/8

Satellite Selection

ATSC Tuners

Command DiSEqC 2.0
Frequency range 50860 MHz

Key reference specification ATSC A/53

Input level -34 to +40 dBmV
Constellation 8-VSB


DVB-C Tuner Input

Connector Type 8*F type female 75Ω for Input
Input Frequency Range 51 ~ 862MHz
Input Level 51 ~ 75dBμV
Symbol Rate 1 ~ 7MBaud (ITU J.83 Annex A, B, C)
Constellation 16QAM, 32QAM, 64QAM, 128QAM,256QAM
Bandwidth 6MHz, 7MHz, 8MHz

Input Return Loss

DTMB Tuner Input

7dB (typ.)
Connector Type 8*F type female 75Ω for Input
Input Frequency Range 46.5 ~ 866MHz
Input Level -87 ~ -29dBm
Symbol Rate 7.56MBaud
Bandwidth 6MHz, 7MHz, 8MHz
Constellation 4QAM-NR, 4QAM, 16QAM, 32QAM, 64QAM
Guard Interval PN420, PN595, PN945
Roll-off Factor 0.05
Interleaving Depth 240, 720

FEC Code Rate

DVB-T/T2 Tuners

0.4, 0.6, 0.8
Frequency Range 30MHz-1000Mhz
Bandwidth 6Mhz, 7Mhz, 8Mhz
Level -87 ~ -20dBm
Constellation QPSK, 16QAM, 64QAM
FEC Demodulation

DVB-T: 1/2, 2/3, 3/4, 5/6, 7/8,

DVB-T2: 1/2, 3/5, 2/3, 3/4, 4/5, 5/6

Guard Interval

ISDB-T Tuners

DVB-T: 1/4, 1/8, 1/16, 1/32,

DVB-T2:1/4, 5/32, 1/8, 5/64, 1/16, 1/32, 1/64, 1/128

Input frequency range 30 ~ 900MHz
Bandwidth 6MHz
Constellation DQPSK, QPSK, 16QAM, 64QAM
Interleave 0, 4, 8, 16
Guard Interval 1/32, 1/16, 1/8, 1/4
Transmission Mode 2K, 4K, 8K (FFT)
FEC (Code Rate) 1/2, 2/3, 3/4, 5/6, 7/8


Encoder Inputs Part

HDMI H.264/H.265(optional) encode Module 

Numbers of Boards             4 HDMI ports per module

Up to 6 Modules in Back panel

Numbers of Ports                8; 12; 16; 20; 24 Channels

NOTE: Up to 24 channels  in FTA tuner / encoder inputs 

Input Resolution

1920×1080@60P, 1920×1080@60i, 



1920×1080@50P, 1920×1080@50i,


1920x1080@59.94P, 1920x1080@59.94i,


1920×1080@30P,1280×720@60P, 1280×720@50P 



Output Resolution

19201080P@60P, 1920×1080@30P,


1920×1080@50P, 1920×1080@25P 




1280x720@60P, 1280x720@50P 




 Encoding format

  MPEG-4 AVC/H.264






GOP Structure

IPPPP (P Frame adjustment, without B Frame)


AVMPEG-2 encode Module 

24 Composite inputs(Option 4,8,12,16 Channels)

6 module in total

48 Pairs of  R/L unbalanced Analog inputs


Connector 9-pin sub-D female

Return loss 35 dB, 10Hz to 5.5MHz


Input Resolution               720*576i/ 720*480i (PAL/NTSC)

Output Resolution            720*576 / 720*480 (PAL/NTSC)

544*576 / 544*480 (PAL/NTSC)

480*576 / 480*480 (PAL/NTSC)

352*576 / 352*480 (PAL/NTSC)

352*288 / 352*240 (PAL/NTSC)

176*144 / 176*112 (PAL/NTSC)

Encoding format                  MPEG-2

GOP Structure                     IBBP, IIIII, IPPPP, IBPBP



Bit-rate                                   1Mbps~13Mbps

Rate Control                         CBR

Select to configure Logo, Caption and QR Coder in any Position of Video Picture (only for

HDMI inputs) 




ModulationoutputModel   128IPinputs



Modulation Outputs Part




Output Return Loss

1Port, F-Type,75




RF output level -24~0dbm,1dbstep
RF frequency 50~960Mhz,1KHzstep
separate control


Numbers of RF Channel







DVB-T Standard         EN300744

FFT mode                           2K,8K 

Bandwidth                           6M,7M,8M

Constellation                       QPSK,16QAM,64QAM

GuardInterval                     1/4,1/8,1/16,1/32

FEC                                       1/2,2/3,3/4,5/6,7/8


DVB-C Standard         J83.A(DVB-C,J83.B,J83.C)


Carrier ANNEXA AnnexB AnnexC



16,32,64,128,256 64 256 64/256



8 6 6 6



5-7 5.057 5.361 4.2-5.3


ISDB-TStandard         ARIBSTD-B31


Constellation                       DQPSK,QPSK,16QAM,64QAM

GuardInterval                     1/32,1/16,1/8,1/4


TransmissionMode           2K,4K,8K(thismodedonotsupportSPTSout)

Coderate                             1/2,3/4,5/6,7/8


BandWidth                           6Mhz



ATSCStandard            ATSC A/53

Constellation                        8 VSB 


DTMBStandard            GB20600-2006

Constellation                        4QAM, 16QAM, 32QAM, 64QAM

Code rate                              0.4, 0.6, 0.8

Guard Interval                      420, 595, 945 



DVB-ASI                               2 Separate ASI (Select from  modulation Channels or MPTS  channel)

75, BNC, 188Bytes

MPEG TS over DVB-ASI (EN 50083-9)

RJ45 Port                              100/1000M GbE Port

Simultaneous output with N*SPTS (from AV/HDMI channels and  1*MPTS ( modulation or MPTS channels) MPEG TS over UDP, unicast, and multicast streaming


Configurable packet size(2-7)x188Bytes 

Encoding bitrate)

Filter Null Packet Total Bitrate                          1-200Mbps (Should be More than 



Maximum EIT Remapping 180 input per channel

EIT remapping by automatically or manually

PSI/SI                                    SDT/PMT/TOT/PAT/BAT/CAT/TDT/NIT Accurate PCR adjusting

Max Numbers                       4 mux  for  RF and  1 Mux for  4*MPTS (4*MPTS

channels can Separate MUX) IP out in Modulation

4 Mpts  IP out  In Tuners gateway



Local interface                     LCD + control buttons

Remote management         Web/NMS NMS

interface                               RJ45, 100M

Language                             English



Voltage range                      100 to 240V AC ; 50/60Hz

Power consumption            60W

Operation Temperature     0 ~ 45

Storage  Temperature        -20 ~ 80

Dimensions                          482mm (L) * 380mm (W) * 44mm (H) Weight                                   4.5 kg



Functional scheme

Q2 diagram




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