Digital microwave transmission system

1.High reliability; 2.High anti interference capability; 3.Business interface rich; 4.Remote management capabilities.

Microwave series products use the technology of computer aided design ( CAD ) and computer aided manufacturing ( CAM ) design, with large scale integrated circuit FPGA, frequency synthesis, Modularization and other advanced technology, improving equipment integration, and ensure the equipment of high performance, high reliability. QPSK/16QAM modem, the data stream is processed by the energy diffusion random processing, RS coding, convolutional interleaving, punctured convolutional coding, modulation baseband forming processing, forward error correction ( FEC ) coding and decoding technique and time domain equalization technology. Greatly improve the bit error rate performance of the system, and the anti-interference ability, anti-multipath fading.

Properties of microwave series products:

1.Modular design, supports hot plug and play, easier to maintain equipment, upgrade; built-in LCD panel, convenient user configuration, operation;

2. Transmitting power range 0-23dBm, software adjustable, equipment with ATPC functions, operation optimization;

3. Rich user service interface, 4/8/16/24/32E1, LAN, E1+LAN services interface;

4. Local loop and distal ring back test function, convenient troubleshooting;

5. Channel selection, modulation mode QPSK or 16QAM, all software adjustable, convenient user configurations;

6. Support group online BER detection function;

7. Support for SNMP network management protocol and Web management, user management;

8. The system of protection, 1+0 or 1+1backup and frequency diversity backup, stronger stability and reliability;

9. Support analog service telephone call or digital IP telephone call, more convenient communication between sites;

10. Forward error correction (FEC) coding and decoding technique and time domain equalization technology. Greatly improve the bit error rate performance of the system, and the anti-interference ability, anti-multipath fading.

 

 

System description
Working frequency (GHz)			15
Transceiver frequency   interval (MHz)			420/490
Transmission capacity			4E1/8E1/16E1/24E1/32E1
Occupied bandwidth (MHz)			3.5/7/14/28
Modulation type			QPSK/16QAM
Transceiver frequencymeta-stable(ppm)			±10
Standby mode			(1+0) No protection (1+1) Same frequency hot   backup (1+1) Frequency diversity   backup
The selection of   operating frequency			IDU or NMS
E1 interface			Code type:HDB3; Interface impedance: 75Ω or 120Ω
Ethernet interface			10/100BASE-T , RJ45
Power supply voltage (V)			DC -48V±20%
Power consumption (W)			30
RF interface			UBR140
Transmitter
Transmitting Intermediate frequency (MHz)				310
Output power (dBm)	QPSK			23
	16QAM			20
Power regulating range				0~max
ATPC (dBm)				+5dBm~max
Receiver
Receiving Intermediate frequency (MHz)				70
Input power(dBm)				- 20 ~ - 90
Receiving   threshold (dBm) BER=1E-6	4×E1			-87/-83
	8×E1			-84/-80
	16×E1			-81/-77
	32×E1			/-74
Input saturation power(dBm)				-10
Auxiliary business and   management
Service phone		3.5mm(1/8 inch)*1
Auxiliary data interface		19.2kbit/s,   RS232C, RJ45
Software upgrade interface		115.2kbit/s, RS232C, RJ45
Management interface		100Mbit/s,   10/100BASE-T, RJ45
Operating system		WIN2000 / WINDOWS NT / WINXP
Mechanics
Size (mm)		IDU:482 × 44× 265 ODU:265×265×110
Weight (kg)		IDU:3.5               ODU:5.5
Work environment index
Working temperature		IDU:0~+50°C         ODU: -33~+55°C
Working humidity		IDU: 20%~90%   ODU:All-weather
Altitude (m)		≤4500

Digital microwave transmission system