PT40A Postal Tag RFID-LSCAN PT40A Postal Tag User Manual Version 2 – Feb 2012 Page: 1 of 6
PT40A Postal Tag RFID-LSCAN TABLE OF CONTENTS 1 INTRODUCTION 3 1.1 Purpose 3 1.2 Definitions 3 2 BLOCK DIAGRAM 3 3 PT40A OPERATION DESCRIPTION 3 3.1 Modes of operation 4 3.2 Valid Excitation Fields 4 3.3 Commands and Parameters 4 3.4 PT23 / PT40A vs. PT21 3.4.1 ExId range 3.4.2 Black-out 4 4 4 4 REGULATORY COMPLIANCE 5 4.1.1 4.1.
PT40A Postal Tag 1 1.1 RFID-LSCAN INTRODUCTION Purpose The purpose of this document is to describe the functionality and operation of the PT40A 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 “PT40A 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).
PT40A Postal Tag 3.1 RFID-LSCAN Modes of operation Postag PT40A has several main modes of operation: sleep, LF excitation recognition, UHF transmission and programming. The sleep mode is the normal mode of operation. In the sleep mode, only the LF receiver is powered up and the total current consumption is less than 5uA. When a LF signal is detected by the LF receiver, it wakes-up the microcontroller to check if this signal has a valid modulation pattern.
PT40A Postal Tag RFID-LSCAN Programmer UP23 box. The tag will not transmit if it enters an LF field but the excitation pattern cannot be recognized (i.e. overlapping fields or interference). 4 REGULATORY COMPLIANCE This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
PT40A Postal Tag 4.1.2 RFID-LSCAN Maximum Duty Cycle To comply with 15.231(a) of FCC regulations from average transmitted power point of view, the maximum transmission Duty Cycle for PT40A must not exceed 24% in any 100ms time window. The maximum value of duty cycle in PT40A is achieved when 100ms window falls on the Excitation transmission bursts. The table below shows the best estimate of the duty cycle in 100ms for different combinations of WEP = WIP+WRC and WSD.
