الوصف

CATV QAM Modulator not only succeeds in DMB****0 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 sent 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 ***** Features: 1) Complies with DVB standard signal channel coding 2) Supports full range variable data rate, bandwidth and QAM mode data stuffing 3) PID filter, re-mapping, PSI, SI information synchronal updating. possible 4) Automatic code stream stuffing and empty pocket deleting 5) Code stream real-time monitoring, empty pocket filtering 6) Supports NIT table modifying 7) PCR adjust, output symbol rate variable: **7MS/s 8) Fixed or agile channel output. 9) Provides DVB ASI / SPI code stream interface *0) Provides RF output monitoring port (**0dB) *1) Local or remote administration *2) LCD display, flexible operation *3) High reliability design. Specifications: 1) Modulating mode: *6, *2, *4, **8, **6 QAM 2) Symbol rate: 2 ~ 7Mbaud/s 3) Correction coding: RS coding **4 4) Input data rate: 1.5 ~ *1Mbps 5) Channel data rate: *0 ~ *6Mbps IF output: 1) IF channel: *5.*5 / *6.*5 / *6.*5 / *0MHz (optional) 2) Output level: **0dBmV 3) Impedance: *0Ω / *5Ω. Physical and operational: 1) Dimensions: *9inch, 1 rack unit standard structure 2) Temperature: 0 ~ *5°C (operating), **0 ~ *0°C (storage) 3) Power: **0V AC ±*0%, *0Hz, *5W