User's Manual

PT40 Postal Tag RFID-LSCAN
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1 INTRODUCTION
1.1 Purpose
The purpose of this document is to describe the functionality and operation of the PT40 tag intended for use in a RFID system
custom designed for International Post Corporation. The tag features reflect the application requirements. You can find more
details into “PT40 Functional Specifications”.
1.2 Definitions
Valid LF Field – A 125 kHz carrier signal modulated OOK with a signal carrying the exciting device identification number
(ExID).
Excitation Mode – tag transmits its ID together with the exciter ID when it is woken up by a valid LF field.
Transmission – When is excited by a valid LF field, the tag transmits its ID over a 433.92 MHz FSK modulated carrier.
2 PT40 OPERATION DESCRIPTION
Postag PT40 is a transponder (RF Tag) that receives an excitation signal and responds by transmitting back a message. It is
custom designed for low cost and reliability in the postal environment. It is a direct replacement of previous models PT21, PT23,
and PT30 tags and can be used with any of the Lyngsoe RFID systems – S96, S21 S23, and S30.
Figure 1 – PT40 Front side Figure 2 – PT40 Back side
Postag PT40 provides the following main functions:
- Identifies a valid 125kHz excitation field and reads its excitation identifier (ExId);
- Following a valid excitation, it transmits on 433.92MHz several identical messages that include (among others) the tag user
data, the ExId and a battery flag.
- Its user data and operating parameters are programmed wirelessly using a special programming device
2.1 Modes of operation
Postag PT40 has several main modes of operation: sleep, LF excitation recognition, UHF transmission and programming. The
sleep mode is the normal mode of operation.