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Tag Talks First

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RFID Edit

In a Tag Talks First (TTF) transaction, an RFID tag communicates its presence to an RFID reader when the tag is within the reader’s RF field. If the tag is passive, then it transmits as soon as it gets power from the reader’s signal to do so. If the tag is active, then it transmits periodically as long as its power supply lasts. This type of transaction might be used when it is necessary to identify objects that pass by a reader, such as objects on a conveyer belt.

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