Comtech EF Data MD2401 - Manual (Page 17)

MN-MD2401 1–1
Revision 7
Chapter 1. INTRODUCTION
1.1 Description
The Radyne MD2401 L-Band Multi Demod system is intended for use as apart of the receiving
ground equipment in a satellite communication system. The unit is a 2RU rack mount system
capable of supporting up to four independent L-Band demodulators and outputs the data onto a
single 10/100/1000 Base-T interface or four independent RS422 synchronous interfaces. The
MD2401 is compatibility with all Radyne's DMD products including the DMD20, DMD50 and
OM20.
Figure 1-1. MD2401 L-Band Multi Demod
The MD2401 is designed to perform at one end of the satellite Single Channel Per Carrier
(SCPC) Link receiving up to four downlink carriers. The MD2401 can be used in a Mesh or Star
Topology Network. Each Demodulator operated independently using BPSK, QPSK, OQPSK or
8PSK Modulation.
All Demodulators can be accessed via a single RS485 serial link system for complete remote
monitor and control (M&C) capability. Each demodulator also offers the terminal control via an
RS232 connection.
Selection of any data rate is provided over the following ranges:
BPSK: 9.6 Kbps to 1200 Kbps
QPSK: 9.6 Kbps to 4.375 Mbps
OQPSK: 9.6 Kbps to 4.375 Mbps
8PSK: 64.0 Kbps to 5.0 Mbps
The MD2401 can track and acquire a carrier over a programmable range of ± 1 kHz to ± 42 kHz.
Acquisition times of less than three seconds are typical at data rates greater than 64 Kbps over a
range of ± 25 kHz.
To facilitate link testing, the MD2401 incorporates a built-in ‘2047’ test pattern with BER
measurement capability.