User's Manual

Operation: C1SR Version
6-4 CENTRON Meter Technical Reference Guide
Transmission Scheme
A transmission cycle contains a wait period before and after each message burst
and a period of random silent time. The silent time is determined by the scaling
factor, which sets a minimum and maximum silent time between each
transmission cycle.
The transmission frequencies (within the 910-920 MHz band), the frequency
hopping pattern, and the time interval between transmission cycles are completely
random in nature. This randomness provides a method for avoiding interference
with transmissions from other devices. Figure 6.3 shows an example of the
CENTRON C1SR transmission cycle containing one message burst.
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Figure 6.3 CENTRON C1SR Transmission Cycle
FCC Regulations
The C1SR communicates in the unlicensed, 910-920 MHz band governed by the US
Code of Federal Regulations (CFR) Title 47, Part 15 Radio Frequency Devices, Sub
Part C Paragraph 249 Intentional Radiator.
Changes or modifications not expressly approved by Itron could void the users authority
to operate the equipment.