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Help CenterDVB-C Digital QAM rf Modulators, 8 Channels rf Modulator
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Specifications
QAM Modulator, 8 channels rf modulator1.DVB standard modulator, dvb-c
2.signal channel coding.
3.qam, qpsk,
8 channels rf modulator, QAM Modulator,
Features
i Complying DVB standard signal channel coding.
l Support full range variable data rate, bandwidth and QAM mode Data stuffing
l super buffer (optional),anti-burst code stream
l PID filter, re-reflection, PSI,SI information synchronal updating possible.
l Automatically code stream stuffing and empty pocket deleting.
l Code stream real-time monitoring, empty pocket filtering
l Support NIT table modifying
l real-time code stream monitoring
l PCR adjusting, output symbol rate variable:1-7Ms/s
l Fixed or agile channel output;
l Providing ASI and Ds3 input port and output port (optional)
l Providing RF output monitoring port(-20dB)
l Local or Remote administration possible.
l LCD display, flexible in operating
l High reliability design, stable in running
Specifications
1. Data interface
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
SPI input interface (Synchronous Parallel interface)
Connector: DB-25 female
Packet format: 188 or 204 bits
DVB Standard: LVDS
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)
3. RF interface
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)
4. Channel signal encoding
Constellation: 16QAM, 32QAM, 64QAM, 128QAM, 256QAM.
Channel encoding: RS encode, DVB standard
MER:≥42dB
SNR(out of band):≥50dB
5. Network management interface
IEEE802.3 ETHERNET, RJ45 interface
Software protocol: SNMP protocol
6. Power supply
Voltage: 165V~265VAC or 85V~265VAC
Frequency: 50Hz±2%
Power consumption: 50W
7. Operation environment
Operation temperature: +5~45°C
Storage temperature: -25~+55°C.
Relative humidity: 10~75%
8. Radiation and safety
Up to GB13837-92 and GB8898-88
9. 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: 75
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