Design Guide

Antenna Port
A DIVISION OF TRIMBLE
Functionality of the ThingMagic Nano 81
ONLY GPIO 1 Used for Antenna Switching
ONLY GPIO 2 Used for Antenna Switching
MercuryAPI allows you to assign your own port numbers to these logical ports so that the
port labels are not confusing to the user.
By default, antennas are activated sequentially, from lowest to highest, returning to the
lowest whenever a new read command is executed. The user can define a port list if they
wish to change this order.
Port Power and Settling Time
The ThingMagic Nano allows the power and settling time for each logical antenna to be
set using the reader configuration parameters /reader/radio/portReadPowerList
and /reader/antenna/settlingTimeList, respectively.
Note
Settling time is the time between the control lines switching to the next
antenna setting and RF turning on for operations on that port. This allows
time for external multiplexerʼs to fully switch to the new port before a signal is
sent, if necessary. Default value is 0.
GPIO
Output 1
State
Logical Antenna
Setting
Low 1
High 3
GPIO
Output 2
State
Logical Antenna
Setting
Low 1
High 2