User Manual
Model 2110 Limited Module Tag Manual
Page 7 of 12
Overview
Background
Tag tracking is accomplished by analyzing time-differences-of-arrival (TDOAs) of tag transmissions. When a tag
transmits a packet, PLUS ® Sensors that successfully receive the packet will send out information concerning
the tag packet, including a precise timestamp. The difference in the timestamp between sensors gives the
TDOA for that sensor pair/tag combination. At least three sensors must hear a tag in order to determine a
valid position for that tag.
Model 2110 Limited Modular Tag
The 2110 Limited Modular Tag allows the implementation of a controlled and defined UWB transmitter onto a
PWA, provided the specifications in the PLUS documentation with regards to PWB layout, board material,
component sources and values, and assembly of the 2110 Tag circuitry are followed.
The 2110 Series Tag is a small transmit only device with an active transmit duty cycle of less than 0.0026%.
The Tag consists of a plastic housing, 3V battery, and the 2110 Limited Module (FCC ID ZEH0414). The Module
includes one integrated antenna.
The data packets transmitted by the Tag include a tag identification code, status information, and time of
arrival data.
As mentioned in the introduction, the data packet rate can be set at the time of manufacture to 1Hz, 6Hz, or
10Hz. This is done by selection of the value of one part and is identified in a table in the schematic.
PLUS Documentation:
The controlling PLUS documentation for the 2110 Limited Module Tag is:
300-0214, PWB, 2110 TAG Module
200-0254 PWA, 2110 TAG Module
The PWB document controls the layout of the 2110 Tag printed circuit board, hence the antenna and
transmitter, and it defines the printed circuit board parameters including board material and thickness.