MDR2400 Digital Radio Link

2.4 GHz Spread Spectrum

Description

• The MDR2400 2.4 GHz Digital Radio provides short to medium range, point-to-point digital communication with high data security at rates up to 2.048 Mbit/s.     
• The MDR2400 series use a split Indoor Unit (IU) and Outdoor Unit (OU) configuration for lowest loss between antenna and transceiver, ensuring better long-range performance than one-piece systems.     
• The MDR2400-D Outdoor Unit uses a Type-N RF output connector for connection to any 2.4 GHz antenna for applications where long range or multiple system co-location is important .     
• The product makes use of Direct Sequence Spread Spectrum technology and may be operated license-free in the 2.4 GHz ISM band.     
• The OU offers two software adjustable frequency plans.     
• The Indoor Unit provides the user interface and status display information.     
• The IU occupies only 1U of 19" rack space and is available with an E1 or a T1 interface card.     
• Interconnection between OU and IU is achieved by low cost data cable.     
• The system is available as a high power FCC version or a standard power ETSI version.     
• The MDR Network Management System provides control and management of networks and SNMP support ensures open network management compatibility.     
• Comprehensive data and RF loop-back functions ensure that the system is easy to install and maintain.

Applications

• Telecommunications companies, cellular operators and private carriers     
• Cellular/PCS base station interconnects     
• Internet distribution     
• Video surveillance data distribution     
• Rural communications

MDR2400 Digital Radio Features 

• Full-duplex data communications     
• Direct Sequence Spread Spectrum technology     
• Split indoor unit and outdoor unit configuration     
• Range of 90 miles (150 km) for 20dB of fade margin using a 27 dBi antenna     
• Available with E1 and T1 data interfaces     
• G.826 compliant error reporting on payload data     
• Unique integrated antenna design allows full-duplex operation over the frequency band without a diplexer     
• Low RF cable losses between the antenna and outdoor unit ensures long range operation     
• Two software selectable frequency plans     
• Low IU to OU interconnecting cable cost     
• Network management software provided allows control and management of networks     
• SNMP support for open network management     
• Built-in AC and DC power supplies

General Characteristics
Frequency Range: 2400 to 2483.5 MHz
Data Capacity: E1 (2048 Mbit/s) T1 (1544 Mbit/s)
Range: 150 km with 20 dB link fade margin using a 27dBi antenna
RF Channel Bandwidth: 18MHz
Modulation: DQPSK
Coding: Direct Sequence Spread Spectrum
PN Code: E1: 11 bits, T1: 13 bits
Processing Gain: 10 to 11dB
Frequency Plan A: 2412 and 2454 MHz
Frequency Plan B: 2430 and 2472 MHz
Transmission Delay: 50 us maximum for radio only 

Transceiver Characteristics

Power Output
High-Power Version, software adjustable, +26 dBm maximum
Standard Power: +12 dBm
Receiver Sensitivity: -90dBm for BER = 1x10-6
Maximum Receive Level: -30 dBm 

Antenna Characteristics

Flat panel (user defined)
Gain: 19 - 22 dBi
Beamwidth: 13 to 16 degrees
Cross Polarization: better than 20 dB
Sidelobe Level: -10 to -13 dB from main lobe
Front-to-Back Ratio: 25 dB min

Parabolic dish (user defined)
Gain: 24 - 27 dBi
Beamwidth: 7.2 to 7.5 degrees
Cross Polarization: 26 to 32 dB
Sidelobe Level: -15 dB from main lobe
Front-to-Back Ratio: 29 to 31 dB 

Yagi (user defined) 
Gain: 14 dBi
Beamwidth: 30 degrees
Sidelobe Level: -13 dB from main lobe
Front-to-Back Ratio: 18 dB 

Data Interface

E1 Interface 
Data Rate: full-duplex 2.048Mbit/s
Digital Interface: ITU-T G.703, G.823 compliant
Connectors: unbalanced 75 ohm BNC and balanced 120 ohm RJ-11
Line code: HDB3 or AMI selectable 

T1 Interface
Data Rate: full-duplex 1.544Mbit/s
Digital Interface: DSX-1, G.703 compliant
Connectors: unbalanced 75 ohm BNC and balanced 100 ohm RJ-11
Line code: AMI or B8ZS selectable 

IU Control Panel
Annunciators: Communications Status Near and Far Alarms
Auxiliary User I/O: 2 in, 2 out (relays)
Wayside Channel: RS -232; 19,200 bps
Management Channel: RS-232; 19,200 bps 

Power Supply and Environment
AC Power: 110 to 240 VAC, 50/60 Hz
DC Power ±21 VDC to ±56 VDC
Power Consumption 15 W Typ., 20 W Max.

Temperature 
OU Temperature Operation: -20°C to +60°C
IU Temperature Operation: 0°C to +50°C 

Size
Outdoor Unit: 270mm x 135mm x 120mm, 2.5kg
Flat Panel Antenna: 530mm x 530mm x 25mm, 3.0kg
Indoor Unit: 1RU 19" housing, table top or rack mounting, 3.5kg 

Regulatory Compliance
USA: FCC Part 15.247
Canada: Industry Canada (IC) RSS210/139
Europe: ETS300-328 

Ordering Information

Included with an MDR2400-D system
2 x outdoor units
2 x indoor units with data interface cards
2 x 20m IU to OU Interconnecting cables
NMS Software for system configuration and management