User's Manual

Page 1 of 5
Banner RM912HP Transceiver
1 Watt, 900 MHz DTS
User Manual
Overview
The Banner RM912HP device is a direct sequence spread spectrum transceiver
(DSSS) operating in the 902 – 928 MHz band. It is an implementation of a particular
ISM band transceiver IC that includes an external LNA in the receive path and external
power amplifier in the transmit path, as well as all necessary RF switches and matching
components. Users need only supply power and ground, control signals, and a controlled
impedance path to one of our FCC approved antennas to fully implement the device
transceiver.
Typical users of this module are projects that are conceived and built by Banner
engineering, usually for low power wireless sensor network telemetry. Projects will
fundamentally be time division multiple access (TDMA) architecture with DSSS
employed for distributing RF energy evenly across the ISM band.
Users will have to comply with the modulation schemes, number of channels,
dwell times, and other parameters that are covered in FCC part 15, and bounded by the
limits set up in the test report. All questions regarding these limits should be directed to
the factory.
This certification only covers operation of the transceiver in particular modes of
modulation scheme and data rate. In particular, the device is licensed for to operate
within the parameters of the IEEE 802.15.4 standard, which deals with 40 kb/s or 250
kb/sec data. It is also licensed for a proprietary 1000 kb/s mode that has nearly the same
spectrum as an 802.15.4 mode. Be aware that there are modes of operation on the
transceiver IC that are not covered by this certification and must be avoided by the user.
This document will discuss fixed and configurable parameters and their relation to
meeting the FCC specifications. Such parameters include the frequency plan, the time
sharing architecture, power control, and approved antennas.
Frequency Plan
The radio is licensed to transmitting or receiving on any of 10 equally spaced,
non-overlapping channels available in the 902-928 MHz band (906, 908 …924 MHz)
when it is operating in the standard 802.15.4 compliant modes. In the proprietary 1000
kb/s mode, there are 17 equally spaced frequencies available (903, 904.5 …927 MHz)
Because it is operating under DTS rules, changing frequencies isn’t specifically required,
but it is still a good practice.
TDMA Plan
The radio is intended for operation in deterministic and ad-hoc networks. The
communications channel is shared in these networks using a time domain multiple access
protocol. The underlying structure to this protocol is a frame made up of N time slots,