RFMURiver Falls Municipal Utilities (River Falls, WI)
RFMURadio Frequency Memory Unit
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The RFMU is basically a digital spectrum analyzer whose coverage (1840 to 2000 MHz) encompasses the PCS band The RFMU contains a PC-104, 386-based microprocessor for high level control tasks, such as scheduling and executing measurement sessions, preprocessing the measured data and uploading the data to the host computer In the PathGuard version a modem connects the RFMU to a system data collection site.
Because most PCS base stations have three sectors, the RFMU has three measurement ports.
The RFMU's common chassis design can be adapted for a 19-inch rack, portable instrument case or weatherproof case for unattended outdoor use.
The results of the test indicated that measured data collected by the RFMU characterized the interference environment more accurately than predictions alone.
The RFMU concept was developed by MLJ Inc., Arlington, VA, which provides engineering services, hardware and software to the wireless telecom industry.