digital wireless system QPSK modulator

digital wireless system QPSK modulator DVB-S Standard for error correction encoding, Input bit rate::1 60M bps Output symbol rate: :1 45Mbaud(adjustable),1Kbaud step Output band width::1.25 56.25MHz(Roll-fall modulus0.25) Output level:100dBuV 110dBuV(step adjustable) 188 and 204 packet automatic identification Output frequency 250MHz 2700MHz(adjustable in segment),min step:50KHz NIT mapping and sending, support 44 NIT mapping PID filtering and re-mapping PSI/SI information pick-up, parse and modification SI information replacement and insert Input data null packet filtering and output data filling. PCR correction Show and inspect system input bit rate and valid bit rate real time 4. Technical specification 4.1 Data interface 4.1.1 ASI interface (Asynchronous Serial interface) A:Input: Connector: BNC Impedance: 75Ω Packet format: 188/204 bits Access data rate: 270Mbps Max valid bit rate: 60Mbps DVB standard B: Loop output: Connector: BNC Impedance: 75Ω 4.1.2 SPI input interface (Synchronous Parallel interface) Connector: DB-25 female Packet format: 188 or 204 bits DVB Standard: LVDS 4.2 RF interface A. RF output: Connector: BNC Impedance: 75Ω Output Frequency: 250MHz 500MHz, 450MHz 950MHz,950MHz 1800MHz(Supplied by different unit) Reflect loss ≥15dB Output level: 100 110dBuV (adjustable) Carrier rejection: > 55dB SNR(out of band):≥45dB B: RF output for test Connector: BNC Impedance: 75Ω Output level: 85dBuV 100dBuV (adjustable) 4.3 Channel signal encoding Constellation: QPSK Channel encoding: RS encode, DVB-S standard MER:≥40dB SNR(out of band):≥45dB 4.4 Network management interface IEEE802.3 ETHERNET, RJ45 interface Software protocol: SNMP protocol 4.5 Network management interface IEEE802.3 ETHERNET, RJ45 interface Software protocol: SNMP protocol 4.6 Power supply Voltage: 165 265VAC or 85V 265V AC Frequency: 50Hz±2% Power consumption: 50W 4.7 Operation environment Operation temperature: +5 45°C; Storage temperature: -25 +55°C. Relative humidity: 10 75% 4.8Radiation and safety Up to GB13837-92 and GB8898-88