Appendix A
26 MACH 10 Residential Ultrasonic Meter Installation and Maintenance Guide
RF Frequency Control Algorithm
The MIU’s FHSS has a sequence of at least 50 different channels for
transmitting data. Associated with the 50 channels are 50 frequencies
that are preselected in a pseudo-random manner. These 50 frequencies
are coded into the software.
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 algorithm is defined so that no two consecutive
transmissions from two MIUs interfere with one another.
MACH 10)R900i Specifications
This section provides you with the specifications for the
MACH 10)R900i.
Electrical Specification
Transmitter Specifications
Environmental Conditions.
Functional Specifications
Power Lithium battery
Transmit Period • Every 14 seconds - standard
mobile message.
• Every seven and one-half
minutes - standard, high power,
fixed network message.
Transmitter Channels 50
Channel Frequency 910-920 MHZ
Output Power Meeting FCC Part 15.247
FCC Verification Part 15.247
Operating temperature -14º to 149ºF (-10º to +65ºC)
Storage temperature -40º to 158ºF (-40º to 70ºC)
Operating humidity 0 to 100% condensing (pit only)
Register Reading 8 digits (AMR)
9 digits (Visual)
MIU ID 10 digits
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