Specifications

Table Of Contents
INTRODUCTION
Page 15 MRC-565 Packet Data Radio Operations and Maintenance
Figure 1. MRC-565 Packet Data Radio
The MRC-565 has two Printed Circuit Assemblies and one optional GNSS Daughter board:
1. A Communications Management Unit (CMU)
The CMU contains an embedded 32-bit controller for managing all the network functions
associated with a packet switched data network and for interfacing to a variety of peripheral
devices. It also contains an RF Analog to Digital Converter (ADC), a Field Programmable
Gate Array (FPGA), a Digital Signal Processor (DSP) to perform all receive and transmit
functions without the need for any Analog Signal Processing requiring physical tweaking or
adjustments. In addition, it has a built-in test capability that automatically monitors the
operating integrity of the unit at all times.
2. A variable power level (10,25,50,100 watt) Power Amplifier (PA)
The power amplifier is used to boost the RF TX level of the CMU from 0 DBM to 40-
50DBM (10,25,50,100 watts) using a 3-stage power amp. This amplifier contains an AGC
that maintains a fixed power level under varying DC voltage levels over a temperature range
of -30 to +60 C.
3. Optional GNSS Daughter board can be added to the MRC565 allowing for Sub 10cm
accurate positioning, given that RTK broadcasts are setup at the Base Station radio.