Detailed Product Description

DMB-5100 CATV QAM Modulator not only succeeds to DMB-5000 high reliability and stability, but also provides user with powerful additional functionalities. The Modulator can receive QPSK signal, QAM signal, or DS3 signal directly to extract MPEG TS. The MPEG TS can be multiplexed with other MPEG TS from ASI to one MTPS. Finally the MTPS will be send to QAM modulation module to realize DVB-C modulation and upconvert to RF. The modulator can meet all of the requirements of Digital Cable TV operators economically and effectively.

Main features:

• Comply to ITU-U J.83, Annex A (DVB), B(Open Cable)
• PID filter and remapping can be configured
• PSI/SI information updating possible
• Filling MPEG TS automatically and delete empty packet intellectively
• PCR correction supported
• 188/204 data packet adaption automatically
• RF output frequency scope 48~862MHz, in 0.1MHz step
• Output level can be adjusted in 100~113dBuV
• Powerful MPEG TS remux and QAM modulation conversion
• Front panel -20dB RF testing output provided
• Parameter record when power off, it can store 99 channels parameters
• Web browser remote control, network upgrade supported

Specification

MPEG TS Input

1 DVB-ASI input

Comply to EN50083-9 ASI connecter

Effective bit rate               1Mbps~54Mbps

ASI mode                        BYTE or BURST

MPEG frame                    188/204 data packet

Return loss                      ≥10dB

Connector                        75ohm BNC

DS3 Input(Optional)

Max input bite rate           44.736Mbps

Format                            Comply to G804/G752 standard

Connector                        75ohm, BNC

DS3 Output(Optional)

Max input bite rate            44.736Mbps

Format                             Comply to G804/G752 standard

Connector                         75ohm BNC

QPSK Input

Input frequency scope        950~2150MHz

Input level                         -25~ -65dBm

Symbol rate                      2~45MBauds

Rolling off Factor               0.35

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

Interleave depth                 I=12

Polarization                       0/13V/18VOptional

Connector                         75ohm, F type

MPEG TS output

2 DVB-ASI output

Comply to EN50083-9 ASI connecter

Max bite rate                     170Mbps

Effective bit rate                 2Mbps~51.6Mbps

ASI mode                         BYTE or BURST

MPEG frame                    188/204 bytes packet

Connector                         75ohm, BNC

RF Output

Output frequency               48MHz~862MHz

Output level                       100dBuV~ 113 dBuV (adjustable)

Output return loss              ≥10dB

I/Q amplitude unbalanced   0.1%

I/Q quadrature error            0.1º

Phase jitter                       0.5º RMS

Outband restrain               55dB

MER                                33dB

C/N                                  45dB

Connector                         75ohm, F

QAM parameter

Mode                               16, 32, 64, 128, 256 QAM

Bandwidth                        ≤8MHz