Design Guide

RF Characteristics
A DIVISION OF TRIMBLE
Hardware Overview 37
Receive Sensitivity
The receive sensitivity is influenced by both user-defined settings and by external
environmental factors. These factors are:
Transmit Level
Gen2 “M” setting
Region of Operation
Receive sensitivity is strongly influenced by the amount of interference caused by the
readerʼs own transmit signal. This interference can be reduced by reducing the transmit
level. ThingMagic always quotes the receive sensitivity at the highest transmit level (+27
dBm for the Nano), but 1 dB of sensitivity is typically gained for every dB that the
transmitter output level is reduced.
The Gen2 “M” setting influences how data is encoded when sent from the tag to the
reader. Higher “M” values send data at lower rates and are more noise immune,