QPSK Modulator:
Outline
COL5500 QPSK digital TV modulator adopts advanced digital signal processing technology, of which receiving port can directly use digital satellite receiver for receiving, thus fully complying DVB-S standard. Not only can it gain relatively high frequency spectrum usage ratio, having very strong anti-interference and relatively high price performance ratio, but also it can well comply analogue FM microwave equipment.
COL5500 QPSK digital TV modulator adopts various processing method, such as random energy spread processing, RS coding, convolution interweave, contracting convolution coding, and pre-modulating baseband shaping processing, etc. all these contribute a high guarantee to the data transmitting performance. In a word, its a high performance QPSK modulator fortransmitting digital TV and other digital signal.
Features
ü DVB-S Standard for error correction encoding
ü Input bit rate:1~60M bps
ü Output symbol rate: 1~45Mbaud(adjustable),1Kbaud step
ü Output band width:1.25~56.25MHz(Roll-fall modulus0.25)
ü Output level:100dBuV~110dBuV(step adjustable)
ü 188 and 204 packet automatic identification
ü Output frequency 250MHz~2700MHz(adjustable in segment),min step:50KHz
ü NIT mapping and sending, support 44 NIT mapping
ü PID filtering and re-mapping
ü PSI/SI information pick-up, parse and modification
ü SI information replacement and insert
ü Input data null packet filtering and output data filling.
ü PCR correction
ü Show and inspect system input bit rate and valid bit rate real time
Specifications
Data interface | |
ASI interface (Asynchronou Serial interface) | |
A:Input: Connector Impedance Packet format Access data rate Max valid bit rate DVB standard B: Loop output Connector Impedance: | BNC 75Ω 188/204 bits 270Mbps 60Mbps BNC 75Ω |
SPI input interface (Synchronous Parallel interface) | |
Connector Packet format DVB Standard | DB-25 female 188 or 204 bits LVDS |
RF interface | |
A. RF output Connector Impedance | BNC 5Ω |
Output Frequency 250MHz~500MHz, 450MHz~950MHz,950MHz~1800MHz(Supplied by different unit)Reflect loss ≥15dB | |
Output level Carrier rejection SNR(out of band) | 100~110dBuV (adjustable) > 55dB ≥45dB |
B: RF output for test | |
Connector Impedance Output level | BNC 75Ω 85dBuV~100dBuV (adjustable) |
Channel signal encoding | |
Constellation Channel encoding MER SNR(out of band) | QPSK RS encode, DVB-S standard ≥40dB ≥45dB |
Network management interface | |
IEEE802.3 ETHERNET, RJ45 interface | |
Software protocol | SNMP protocol |
Network management interface | |
IEEE802.3 ETHERNET, RJ45 interface | |
Software protocol | SNMP protocol |
Power supply | |
Voltage Frequency Power consumption | 165~265VAC or 85V~265V AC 50Hz±2% 50W |
Operation environment | |
Operationtemperature Storage temperature Relative humidity | +5~45°C; -25~+55°C. 10~75% |
To know more ,welcome to contact our salesman!
Colable Elecronics Co,.LTD
