Antenna detection – ThingMagic M5e User Manual
Page 10
4 Port Multiplexer Board
Accessory Board Configuration
9
Antenna Detection
When using the multiplexer in the
configuration the M5e
functionality for manually (Get Antenna Configuration - 61h command) and automatically
(Set Reader Configuration - 9Bh, option 0x04 - Check Antenna Connection) detecting
connected antennas can be used.
This functionality requires the M5e module to be running firmware v1.3.0 or later.
Note
Reliable antenna detection requires that an attached antenna pass at least a
small amount of DC current. Many antennas do not pass DC current. Due to
such antennas an indication that a port is connected/terminated is always
accurate, but an indication that a port is not connected/terminated may not
be accurate.
MUX1
Mux switch control
Jumper to OUT1 (GPIO Output
#1) if multiplexer is to be con-
trolled by module.
Use this pin to bring in
external control from
motherboard if multi-
plexer is not controlled
through ribbon cable.
+5
+5V source to
multiplexer
Ignore
Use this pin to bring in
+5V from motherboard if
multiplexer is not con-
nected to power source
through ribbon cable.
Gnd
Ground to multi-
plexer
Ignore
Use this pin to bring
ground to multiplexer from
motherboard if multi-
plexer is not connected to
power source through rib-
bon cable.