RoadMAPS Overview
2-14
RoadMAPS User’s Manual
Figure 2.8 RoadMAPS Unit Diagram
RF Receiver
Radio Frequency (RF) Front End
The RF front end module receives the 915 MHz receiving band
from the antenna through the duplexer. The duplexer functions as
a translator, ensuring that the receiving band is passed from the
antenna to the RF receiver. The RF front end module then trans-
lates the RF spectrum from the 915 MHz band down to a 41 MHz
band.
Digital Multi-channel Receiver (DMR)
The DMR module receives and decodes the bands from the RF
front end module to determine if the signals are from an RF mod-
ule that uses the SURF protocol (R900) or an RF module that uses
an ITRON protocol (R100, R200, R300, ERTs). Samples from up to
8 identified frequencies are processed to obtain the data signals.
The signals are compared to a profile, and if there is a match, the
signal is processed to extract and validate the data within it. The
extracted data is stored in local cache memory.
The RoadMAPS Unit reads signals from R900 water MIUs and
R100, R200,R300, and ERT gas and electric MIUs with a high rate
of success on the first pass. Inbound meter readings are collected
PPC
12V DC
RF Receiver
RF
Front End
DMR
PC104
RF Transmitter
Logic Control
Transmitter
Duplexer
Power Supply
Summary of Contents for RoadMAPS
Page 1: ...RoadMAPSTM User s Manual Version 2 0 ...
Page 10: ...x RoadMAPS User s Manual Notes Tables ...
Page 66: ...Using the RoadMAPS Unit Notes 4 22 RoadMAPS User s Manual ...
Page 70: ...Closing the RoadMAPS Unit Notes 5 4 RoadMAPS User s Manual ...