DVB-C digital QAM rf modulators, 8 channels rf modulator

Specifications

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