User's Manual

Antenna Port
A DIVISION OF TRIMBLE
Functionality of the ThingMagic Nano 77
Antenna Port
The ThingMagic Nano has one monostatic antenna port. This port is capable of both
transmitting and receiving. The module also supports
Using a Multiplexer, allowing up to 8
total logical antenna ports, controlled using two GPIO lines.
Note
The ThingMagic Nano does not support bistatic (separate transmit and
receive port) operation.
Using a Multiplexer
Multiplexer switching is controlled through the use of one or two of the General Purpose
Input/Output (GPIO) lines. In order to enable automatic multiplexer port switching the
module must be configured to use Use GPIO as Antenna Switch in /reader/antenna/
portSwitchGpos.
Once the GPIO line(s) usage has been enabled the following control line states are
applied when the different Logical Antenna settings are used. The tables below show the
mapping that results using GPIO 1 and 2 for multiplexer control (as is used by the
ThingMagic 1 to 4 multiplexer) allowing for 4 logical antenna ports.
Note
The Logical Antenna values are static labels indicating the available control
line states. The specific physical antenna port they map to depends on the
control line to antenna port map of the multiplexer in use. The translation
from Logical Antenna label to physical port must be maintained by the
control software.