4 qam-qam modulator in:4 qam Out:4 qam/dvb-c rf Control:LCD+keypad,NMS OEM/ODM 4-Channel qam to qam Trans Modulator Overview

QAM is compliant with DVB-C standard. Device convert QAM signal to mpeg-2 TS, then can be processed by QAM modulation. It includes technology such as convolution, RS correction .After IF process, the output will be RF 87~870MHz which can be transmitted in HFC or MMDS network. It is widely used in digital TV head end system, data broadcasting, VOD, internet, TV conference etc.

Features

QAM Modulator consists of following modules.

>Data process unit converts all inputs signal into standard signal and process .These data will be further processed by QAM modulation.

>QAM Modulation unit modulates the TS into spectrum signal.

>RF modulation up-converts the IF into 87~870MHz TV channels.

>CPU/LCD/LED/ is for controlling the equipment and input order to equipment.

 

> QAM Mode 16QAM,32QAM,64QAM,128QAM,256QAM,512QAM,1024QAM

>Input port :DVB-C/QAM

>Input bit rate range :1.5~108Mbps

>Output bit rate range :2~56Mbps

>Output signal bandwidth (BW) :1.15~8.05MHz(rolling factor 0.15)

>Output data symbol rate range :1~7Mbaud/s

>RF range :87~860MHz

>RF output level :85dBuV~105dBuV( step possible)

>PCR correction

>PDF filtering

>super cache-buff

>PSI/SI editable

>RF test port

>Alarm error display

>LCD display local control of all parameters

>Ethernet port, remote control possible

  SPECIFICATIONS

1 DATA PORT1.1DVB-C/QAM PORT

Input port: 4 DVB-C/QAM

Connector: F-head

Impedance: 75W

Data stream standard: ISO13818-1

Data rate: Max 214Mbps (each route)

Start Mode: 16QAM, 64QAM, 256QAM

Symbol: 1-7Mbps

2 RF PORT2.1 RF OUTPUT PORT

Connector: F-head

Impedance: 75Ω

Output frequency: 87MHz~870MHz

Output return loss: ≥15dB

Output level:85dBuV~105dBuV( adjustable)

Carrier suppression: >55dB

SNR(out band ): ≥50dB

2.2 RF TEST PORT

Connector: F-head

Impedance: 75Ω

Output level: 65dBuV~85dBuV(adjustable)

2.3 SIGNAL ENCODING

   Modulation: QPSK, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM

Channel encoding: DVB RS encoding

Modulation error rate (MER): ≥40dB

SNR(out band): ≥50dB

2.4 NETWORK INTERFACE

Ethernet port: IEEE802.3 ETHERNET PORT, RJ45 PORT

Protocol: UDP

2.5 POWER FAILURE AUTO SAVE

Automatically save when the power fails

2.6 POWER SUPPLY

Voltage                                               90V~250VAC

Frequency                                                 50Hz±2%

Power consumption                  25W

2.7 WORK TEMPRATURE

Environment                                        0°C~50°C

Storage                          -25°C~+55°C

Humidity                    10~75%

2.8 MECHANICAL FEATURE

44.5mm(H,1U)×483mm(W,19″)×410mm(D)

2.9WEIGHT

5.0 kg      

Modulation Mode		16,32,64,128,256,1024QAM
Symbol rate		1~7Mbaud/s
Error-correcting codes		RScode188/204
Input data code rate		1.5~51Mbps
MER		>33dB
BER		0
Input		4 ASI or 4 DVB-C/QAM RF in
Output		4 QAM/DVB-C RF out
RF Frequency		87MHz~860MHz (agility or fixed output)
Output LEV		>=115dBmV
Output LEV adjustable range		0-16 dB(0.5 dB stepping)
Impedance		75ohm
Output Return Loss		>=12 dB
General Features	Size	44mm*482*410mm
	Environment	0 ~ 45(Operating);-20 ~ 80(Storage)
	Power	100-240VAC(-+10%),50Hz,25W
Management		Network RJ-45 10/100 M
		Keyboard + LCD

  NMS OPERATION

User can set the parameters via NMS on computer

 

Connect QAM to PC via RJ 45 cable

1 Click” add freq node” to build a frequency node

2 Then click” add device” to add a device. Here please select QAM modulator

3. Name the equipment and input IP address(default is 192.168.0.42), then click” ok”

4. After connection, you can set all parameter in software the same as front panel settings

The NMS menu as below:

 

4in1 QAM to QAM TransModulator(4 RF(QAM) IN,4 RF out)