DVB cable TV QAM modulator

DVB cable TV QAM modulator 1. Main features Support ITU-T J.83A and B DVB-C Standard Constellation:16QAM,32QAM,64QAM,128QAM,256QAM Input interface: ASI and SPI (or DS3 /E3 optional) Input bit rate: 1.5 51.6Mbps Output bit rate:2 56Mbps Output bit rate:1.15 8.05MHz(Modulus 0.15) Output symbol rate:1 7Mbaud/s RF output:48 860MHz Output level:105dBuV 115dBuV(step adjustable) 188/204 packet automatic identification NIT mapping and sending function,support 44 NIT mapping 10 PID filter 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 3 Show and inspect system input bit rate and valid bit rate real time 2. Technical specification 2.1 Data interface 2.1.1 ASI interface (Asynchronous Serial interface) A:Input: Connector: BNC Impedance: 75Ω Packet format: 188/204 bits Access data rate: 270Mbps Max valid bit rate: 51.6Mbps DVB standard B: Loop output: Connector: BNC Impedance: 75Ω 2.1.2 SPI input interface (Synchronous Parallel interface) Connector: DB-25 female Packet format: 188 or 204 bits DVB Standard: LVDS 2.2 IF interface A: IF input Connector: BNC Impedance: 50Ω IF frequency: 35.25/36/36.15/44 MHz (optional) IF Bandwidth≤8MHz Reflect loss ≥18dB Input level: 100dBuV (rms) B:IF loop output: Connector: BNC Impedance: 50Ω IF frequency: 35.25/36/36.15/44 MHz (optional) IF Bandwidth≤8MHz Reflect loss ≥18dB Output level: 100±2dBuV(rms) 2.3 RF interface . . . . 2.8Radiation and safety Up to GB13837-92 and GB8898-88 2.9 Mechanic characteristics Dimension: 44.5mm(1U)*483mm*(19”)*400mm Weight: 7kg 2.10 E3 /DS3 Interface (optional) A: Input (G.703 standard) Connector: BNC Impedance: 75Ω Packet format 188/204 bits Bit rate: E3/DS3 No-frame format (34.368Mbps/44.736Mbps) B. Output (loop) Connector: BNC Impedance: 75Ω A. RF output: Connector: BNC Impedance: 75Ω Output Frequency: 48 800MHz Reflect loss ≥15dB Output level: 105 115dBuV (adjustable) Carrier rejection: > 55dB SNR(out of band):≥50dB B: RF output for test Connector: BNC Impedance: 75Ω Output level: 85dBuV 105dBuV (adjustable) 2.4 Channel signal encoding Constellation: 16QAM, 32QAM, 64QAM, 128QAM, 256QAM. Channel encoding: RS encode, DVB standard MER:≥42dB SNR(out of band):≥50dB 2.5 Network management interface IEEE802.3 ETHERNET, RJ45 interface Software protocol: SNMP protocol 2.6 Power supply Voltage: 165V 265VAC or 85V 265VAC Frequency: 50Hz±2% Power consumption: 50W 2.7 Operation environment Operation temperature: +5 45°C; Storage temperature: -25 +55°C. Relative humidity: 10 75%