The 2Ghz Digital Microwave Radio(2 Mbps and 8 MBPS) - DMR 2120 is a compact power efficient point to point communication equipment, which is widely deployed as a backbone network for communication links.
 

United Communications - DMR 2120

The DMR2120 is used in rural and semi-urban areas as a terminal or as regenerative type repeater, covering the entire frequency range of 2.0 ghz-2.5Ghz. Bands.

System Features

Synthesized trans-receiver frequency control
O-QPSK modulation.
Built-in Test Equipment (BITE)
Supervisory facilities provided to monitor the status of the system
Order Wire with Remote supervisory facility permits monitoring of remote station from any site
Flexibility to configure either to 4 X 2 Mbps / 1 X 8 Mbps
Compact and modular in construction offering efficient, flexible & low cost transmission solution
Front panel LCD display for configuration and monitoring
MTBF : >52,000 hours
Coverage is not a constraint for a clear line of sight

Operating Temperature : 0° C to 50° C

Redundancy

In Hot standby Tx and Rx path switching is independent. Switching can be either automatic or manual

Power

Power

Power supply : -40 V to -60 V, (-48 V nominal)
Power consumption : < 100 W for 1+1 System

Standards
As per CCITT and ITU-T& ITU-R Stds

TECHNICAL SPECIFICATIONS

Capacity : E1 ,4xE1 or E2
Channel Capacity : 120 Max
Data Rate (Mbps): 4x2 Mbps /8Mbps
Adjacent channel spacing: 7.0
System gain (dB): > 112
Modulation : OQPSK
Demodulation: Coherent
Insertion loss : Tx port to antenna port <= 2.5.0 dB
Tx-Rx isolation :90 dB or better

Transmitter specifications

RF frequency range: (2.0-2.5)GHz
RF power : +31 dBm. (nominal)
RF output impedance : 50ohm (nominal)
Spurious and harmonic o/p: -50 dB or better at the antenna port
Frequency step: Settable in 3.5 MHz increments

Receiver Specifications

RF frequency range : (2.0-2.5)GHz
Overall noise figure <= 4 dB
LO stability:± 20 ppm or better
IF frequency:70 MHz
AGC dynamic range : 45 dB min
Decoding : De-scrambling

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