User's Manual

DRAFT PLUS Tag User’s Manual 7
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The pulse characteristics are determined only by the drive circuit and are not a function of the 1 MHz PRF.
This direct signal generation approach does not use an intermediate frequency and up-conversion approach.
The tag signaling only consists of an OOK modulated 1 MHz pulse train and does not use channel coding,
frequency hopping, or other channelization techniques. All signal shaping is implemented in the hardware
circuit described above.
The tag programming interface is for factory loading of the microcontroller firmware only. The programming
pins are internal to the tag (only accessible prior to welding of the plastic enclosure). The programming pins
can not be accessed by the user after the tag case has been ultrasonically welded.
It is not possible for the user to change RF signal characteristics, PRF, or transmitted data content. The tag
antenna is integrated onto the circuit board inside the plastic enclosure and cannot be accessed, removed, or
replaced.