Design Guide

RF Characteristics
A DIVISION OF TRIMBLE
34 Hardware Overview
RF Characteristics
RF Output Power
The output power may be set to a separate value for read and write operations (for many
tags, more power is required to write to read). The range of values for both settings is
from 0 dBm to +27 dBm, in 0.01 dB increments. (For example, 27 dBm will be configured
as “2700” in units of centi-dBm.) The modules are calibrated when they are manufactured
in 0.5 dB increments and linear interpolation is used to set values with greater granularity
than this.
The granularity of the RF output power setting should not be confused with its accuracy.
The accuracy of the output level is specified to be +/- 1 dBm for each regional setting.