User's Manual

Product Description
RF Frequency Control Algorithm
The ROOO module's frequency-hopping spread-spectrum has a sequence of at least
50 different channels for transmitting data. Associated with the 50 channels are 50
frequencies that can be pre-selected in a pseudo random manner. These 50 fre-
quencies are coded into the software.
The R900 module avoids 914 MHz to prevent potential collisions with the Advan-
tage probe.
RF Transmission Period and Randomness
The random period generation uses the same random seed created for the channel
definition to generate the transmission randomness. The randomness algoritlun is
defined so that no two consecutive transmissions from the two R900 modules will
interfere with one another.
R900 Module Range and Read Success Rates
The R900 module is a radio frequency device that complies with FCC Part 15.247
allowing for a higher output power device. The higher output power coupled with
the sensitivity of Neptune's reading systems enhances a utility's range, minimizing
the reading time while maximizing read success rates.
R900G Endpoint Value-Added Features
The R900G Endpoint provides tamper indications, such as, removal