User's Manual

PRELIMINARY FCC ID: BIB61201001 INTRODUCTION 1-1
PRELIMINARY MCC-6120 SDR Packet Data Radio Network
1.0 INTRODUCTION
The MCC-6120 SDR PACKET DATA RADIO is used in MCC’s Network. This is an
Extended Line-of-Sight (ELOS), packet switched, digital data network that operates on a single
frequency in the low VHF band (40-50 MHz), a high VHF band (151-162 MHz), or a UHF band
(896-901/935-940 MHz). A network has a cellular structure that uses the programmable MCC-
6120 SDR as a base station, a repeater and as a remote station. One or more Data Centers are
normally used for the central collection and distribution of data to a customer’s office. The
network can be as small as one base station or may be comprised of thousands of base stations,
repeaters and remote stations. The networks are used for position reporting in mobile
applications (AVL), fixed site data collection (SCADA) and messaging.
TYPICAL NETWORK
FIGURE 1.0
The MCC-6120 SDR can be dynamically programmed to operate in three distinct modes: (1) as
a base station, (2) a repeater station, or (3) as a remote station. As a base station it is connected
to a Data Center or Host through a Data Network. The Data Network can be frame relay,
microwave, the Internet or other forms of existing infrastructure. The MCC-6120 SDR has two
Ethernet (10MHz) network interface adaptors. If a direct connection is not available the MCC-
6120 SDR operates as a repeater into the nearest base station. Multiple repeater links may be
chained together for expansion of the network when no other communication infrastructure is
available. In addition the unit has an 802.11(b) network adaptor that can be used to connect to
CLIENT’S
OFFICES
DATA
NETWORK
DATA CENTER
OR
HOST
CLIENT’S
OFFICES
B
R
M
BASE STATION
REMOTE STATION (FIXED OR MOBILE)
REPEATER STATION
M B
M
M
M
M
R
B
R
M M M
R B
ELOS RF NETWORK
OTHER
CLIENTS