User's Manual

PRELIMINARY FCC ID: BIB61201001 INTRODUCTION 1-2
PRELIMINARY MCC-6120 SDR Packet Data Radio Network
802.11(b) access points in the infrastructure mode, or to other 802.11(b) devices in an add-hoc
mode.
As a remote station it can operate as a mobile unit roaming throughout the entire network,
automatically linking with the nearest base station or repeater. When a remote station is installed
at a fixed site it also links itself automatically to the nearest base station or repeater.
The MCC-6120 SDR operates line-of-sight using groundwave. The range of communication by
groundwave is primarily determined by diffraction around the curvature of the earth,
atmospheric diffraction and tropospheric propagation. These ranges are successfully extended
by MCC through the use of robust protocols, sensitive receivers, 100 watt transmitters (low
band) or 30 watt transmitters (high band), and short packetized messages. MBNET200 is the
operating system that successfully integrates these features, providing error-free communication
throughout the network at ranges from 25-50 miles.
The network protocol embedded within the MCC-6120 SDR uses a combination of both carrier
sense multiple access (CSMA) and time division multiple access (TDMA) for achieving a
channel utilization rate greater than 90%.
The MCC-6120 SDR uses GMSK modulation and has selectable data rates of 4.8 Kbps, 9.6Kbps
and 19.2Kbps. Data rates and modulation filtering are limited by internal software to values that
have been type accepted by the FCC for the particular frequency band selected. This prevents
transmitting on an unauthorized frequency or modulation format.
The MCC-6120 SDR has 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. In addition, it has a built-in test capability that automatically monitors the operating
integrity of the unit at all times. This feature also eliminates the need for any special test
equipment during the installation phase. A laptop, or equivalent, is required to initialize and
operate the MCC-6120 SDR packet radio.
1.1 Manual Organization
There are three major sections in this manual, plus a number of appendices:
Section 2.0 DESCRIPTION
This section provides both a physical description and a functional description of each module in
the MCC-6120 SDR. The detailed technical specifications are provided for each printed circuit
board assembly (PCA), as well as the organization of the unit’s computer memory.
Section 3.0 INSTALLATION
This section covers site selection and general installation guidelines, including instructions for
cabling, antenna and power source connections. Power up procedures, initialization and