User's Manual

708UM0210-01 October 1999 Autotag-P User Manual Page: 2 of 35
Table of Contents
1. INTRODUCTION...........................................................................................................................4
2. TECHNICAL DATA.......................................................................................................................6
2.1. System Parameters ................................................................................................................6
2.2. Autotag-P Base Station ATR430P series................................................................................6
2.2.1. Electrical...........................................................................................................................6
2.2.2. Mechanical.......................................................................................................................6
2.2.3. Environmental ..................................................................................................................6
2.2.4. RF Channel......................................................................................................................6
2.2.5. Communications...............................................................................................................7
2.2.6 Relay Outputs...................................................................................................................7
2.3. Autotag-P Tag Transponder AT430P......................................................................................8
2.3.1. Electrical...........................................................................................................................8
2.3.2. Mechanical.......................................................................................................................8
2.3.3. Environmental ..................................................................................................................8
2.3.4. RF Channel......................................................................................................................8
2.3.5. Code ................................................................................................................................9
2.4. Autotag-P Tag with Proximity Transponder.............................................................................9
3. FCC REGULATIONS..................................................................................................................10
4. OPERATING PRINCIPLES.........................................................................................................11
4.1. Radio Frequency Communications: Important concepts .......................................................11
4.1.2. Reflection and absorption...............................................................................................12
4.1.3. Noding and nulls.............................................................................................................12
4.1.4. Radiation pattern............................................................................................................13
4.2. Autotag-P Communications Architecture...............................................................................14
4.3. Coding..................................................................................................................................14
4.3.1 32 Bit User Data (Tag only) ............................................................................................14
4.3.2 16 Bit Installer Code.......................................................................................................15
4.3.3 8 Bit Distributor / OEM Code ..........................................................................................15
4.3.4 32 Bit Mask (Base Station Only).....................................................................................15
4.4 R.F. Communications between Base Station and Tag ..........................................................15
4.4.1. Poll from the Base Station..............................................................................................15
4.4.2 Response from the Tag..................................................................................................15
4.4.3 Acknowledge from the Base Station...............................................................................15
4.5. Communication Protocol Options..........................................................................................16
4.5.1 Wiegand Communication Protocol..................................................................................16
4.5.2 Clock&Data Communication Protocol.............................................................................16
4.5.3 RS-232 – Autotag-P Point-to-point Communication Protocol..........................................17
4.5.4 RS-485 – Nortech Multi-drop Communication Protocol...................................................17