Detailed Product Description

QPSK Modulatorfor Digital CATV system, adopts advanced FPGA technology to implement DVB-S channel encoding and QPSK modulation. It fully complys to DVB-S standard and has better IF output performance. The QPSK modulator can be used in the digital satellite television broadcasting system. In addition, it also can be used in MMDS microware point to point transmission system. DMB-9500 QPSK modulator is the most effective DVB-S modulator in the market.

Features:
1) QPSK modulator
2) Compliant with ETS 300 421, (DVB-S)
3) Symbol rate up to 30MS/s
4) Bit rate up to 48Mbit/s
5) DVB-ASI or optional DVB-SPI Transport Stream input
6) Automatic Transport Stream adaptation
7) IF output: (optional frequencies up to 2700 MHz)
8) User-friendly local control with front panel display and keypad
9) RS232 remote control interface
10) Stand-alone unit, 1 rack unit high

Applications:
1) Digital microwave link IF modulator
2) Satellite uplink IF modulator (DVB-S)
3) CATV - MMDS

Specifications:
1) Modulation scheme: QPSK (ETS 300 421 DVB-S)
2) IF output frequency 70 Hz (optional: frequencies up to 2700MHz)
3) Input digital interface DVB - ASI (BNC socket) option: DVB - SPI
4) Output level: -5 ±2dBm
5) Output impedance and connector 50ohm L16 socket
6) Bit rate: Up to 48.382MB/s
7) Symbol rate: up to 30MS/s
8) Baseband shaping (roll-off): 35%
9) Foward Error Correction (FEC) encoding
10) Code rate: 1/2, 2/3, 3/4, 5/6, 7/8 selectable
11) Outer code: Reed Solomon (204, 188, T=8)
12) Interleaving: Convolutional, I=12
13) Data scrambling: Per ETS 300 421

Physical and operating:
1) Power Supply 220V AC ± 10% 50/60Hz
2) Operating temperature range: 0°C to 45°C
3) Housing rack drawer: 19", 1 rack unit

QAM Modulator (TLQM-3):
QAM Modulator CATV digital head-end, receives DVB transport streams which come from a coder, multiplexer, DVB gateway, scrambler, video server etc. It performs signal processing such as RS coding, convolution interleaving and QAM modulating, and provides IF/RF output.

Features:
1) Complying DVB standard signal channel coding
2) Support full range variable data rate, bandwidth and QAM mode data
stuffing
3) PID filter, re-reflection, PSI,SI information synchronal updating possible
4) Automatically code stream stuffing and empty pocket deleting
5) Code stream real-time monitoring, empty pocket filtering
6) Supports NIT table modifying
7) PCR adjusting, output symbol rate variable:1-7MS/s
8) Fixed or agile channel output
9) Providing DVB ASI/SPI code stream interface
10) Providing RF output monitoring port(-20dB)
11) Local or Remote administration possible
12) LCD display, flexible in operating
13) High reliability design, stable in running

Specifications:
1) Modulating mode: 16, 32, 64, 128, 256 QAM
2) Symbol rate: 2 ~ 7Mbaud/s
3) Correction coding: RS coding 204
4) Input data rate: 1.5 ~ 51Mbps
5) Channel data rate: 20 ~ 56Mbps

IF output:
1) IF channel: 35.25 / 36.15 / 36.65 / 70MHz (optional)
2) Output level: 100dBmV
3) Impedance: 50Ω / 75Ω

Miscellaneous:
1) Dimensions: 19", 1 rack unit standard structure
2) Temperature: 0 ~ 45°C (operating) -20 ~ 80°C (storage)

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