Microyal Model MDH-1000TM

Digital Cable TV QAM /QAM Agile Transmodulator

MDH-1000TM is a Digital Video Broadcast-Cable (DVB-C) TV QPSK/QAM Full Frequency Range Agile Transmodulator, which combines the digital satellite QPSK (DVB-S) demodulator and digital cable QAM (DVB-C) modulator in a single unit. MDH-1000TM is designed to receive DVB TS signal (transport stream) from satellite or other digital headend devices, then to modulate and channel code into DVB-C format, MDH-1000TM will output the up-converted DVB-C signal to the CATV system (47MHz~860MHz). The signal from satellite should be QPSK demodulated directly, or the signal can be supplied by other devices (for examples, MPEG2 Multiplexer, Encode, digital Video server) from its DVB-ASI or DVB-SPI (LVDS) interface input. The QAM modulation could be chosen among 16, 32, 64, 128 and 256 level numbers. MDH-1000TM also has the package stuffing function for low rate stream input. Microyal's MDH-1000TM Digital Cable TV QPSK/QAM Agile Transmodulator is mainly used in digital CATV system. It could be used to transmodulate the digital satellite signal from DVB-S/QPSK to DVB-C/QAM; It also could be used as a DVB-C/QAM modulator when using the DVB-ASI or DVB-SPI signal input. MDH-1000TM has LCD monitor and front panel key pad for easy operation, and it is suitable for 19'' rack with 1U height. It is the most economical and the most efficient choice for up-grading the exist CATV systems and MMDS systems.

Features:
  • Fully comply with the CATV professional design
  • Fully comply with DVB-S / ETSI 300421 & DVB-C / ETSI 300429 standard
  • Auto identify FEC code, including RS and Viterb1/2、2/3、3/4、5/6 and 7/8
  • Support one ASI input and one SPI (LVDS) input
  • Auto calculate and convert satellite TV DVB-S symbol rate into cable TV DVB-C symbol rate
  • Empty package stuff
  • Output full frequency (47~860MHz) RF CATV signal, and directly input the desired frequency through the LCD monitor
  • Directly enter the desired RF output level through the LCD monitor（100-113 dBμV）
  • User friendly operation interface through LCD monitor
  • Automatic last channel memory
  • Store up to 99 channel parameters
    •

Specifications:

QAM demodulation
Input Frequency Range

900~2050MHz
Input level -25~-65dBm
Input Impedance 75Ω
Connector F connector
Symbol Rate 2~45MBauds
Rolling Off Factor 0.25 or 0.35
Punctured Rates 1/2, 2/3, 3/4,5/6, 7/8
De-Interleaving I=12
Polarization 0/13V/18V optional
0/22K 0/22KHz switch

QAM modulator
QAM mode 16, 32, 64, 128, 256 QAM
Output Symbol Rate 3.5~7MBaud/sec
I/Q Amplitude deviation < 0.3%
I/Q Phase deviation <0.3°
PHASE JITTER <0.5°RMS
MER >32dB
Output Frequency 47~860MHz（Agile）
RF Connection 75Ω, F connector
Output Level 100~113 dBμV adjustable
RF Harmonics and Spurious >50dBc
Return Loss ≥14dB

Input TS

ASI

Connector

75Ω，BNC

Data Rate

270Mb/s

Available Bit Rate

1M~54Mb/s

Data Mode

BYTE or BURST

Packet Length

188 or 204 byte

Signal Level

1Vp-p±0.1V

Return Loss

>10dB

SPI

Connector

25 pin sub-D Female

Data Rate

1M~54Mb/S

Packet Length

188 or 204 byte

Signal Level

0.25~0.45V

General

Operating Temperature

0~40°C

Storage Temperature

-20~70°C

Humidity

<95%

Power Supply

AC 90~240V,50Hz±2Hz, 45W

Dimensions

483mm×440mm×44mm

Weight

7Kg