User Manual

MDR2400/5800-SR, Orion2410/5810-SRi and Orion 5825-SR
862-01881 Issue 12c Page 17
SNMP Management application. The FCC standards for the MDR2400 unit require a
limited output power as stated on page 2, U.S. only.
NOTE 1 The firmware on the Orion and MDR type RFUs will not accept power level
settings that fall outside the FCC compliant levels.
2.2.3 MDR2400, MDR5800, Orion2410i, Orion5810i and Orion 5850 RF Units
The RF Units transmit and receive RF signals through a diplexer interfaced via an RF
cable to an external antenna. The unit has a type-N connector for connection to the
RF cable used between the RFU and the antenna.
The RF Unit houses the following main parts:
a. Transmit/Receive Modules
b. Baseband Modulator/Demodulator Circuitry
c. Microcontroller/Framing & Buffering Circuitry
d. Power Amplifier
e. Diplexer
2.3 MDRMTE, MDRMETU, Orion10 and Orion25 Digital Indoor Unit
The Digital Indoor Unit is designed for mounting in a 19” rack, occupying a 1U slot. It
can also be used as a table-top system.
The Digital Indoor Unit accepts n x T1/nE1 user payload channels and combines it
with Wayside Service Serial Data and IP data to be transmitted across the radio link.
The Digital Indoor Unit is fitted with a DC power supply.
There are four types of Digital Indoor Units:
An MDR 120 Ohm (scalable up to 4 T1/E1),
an MDR 75 / 120 Ohm (scalable up to 4 T1/E1),
an Orion 10 Digital Indoor Unit (Orion 25 with only up to 4 T1/E1)
and an Orion 25 Digital Indoor Unit (scalable up to 8 T1/E1).
The MDRMTE and MDRMETU Digital Indoor Units can operate with the MDR2400,
MDR5800, Orion2410i and Orion5810i RF Units.
The Orion 10 and Orion 25 Digital Indoor Unit is used with the Orion 5850 RF Unit, but
can also support the MDR2400, MDR5800, Orion2410i and Orion5810i RFUs if the
appropriate firmware version is loaded on the Digital Indoor Unit.
MDR MTE DIGITAL INDOOR UNIT V2, 120 OHM 651-03810-02.1, front panel
1 Payload
T1/E1
2 DIU
Status
LED
3 Reset
button
4
5
6 10BaseT
RJ45 Socke
t