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Summary of Contents for Texas Instruments TIRIS 2000 Series
- Page 1 July ’00 Preface Series 2000 Reader System 4-Channel TX/RX Multiplexer Module for Remote Antenna RFM RI-MOD-TX8A Reference Guide 11-06-21-039 July 2000...
- Page 2 Series 2000 4-Channel TX/RX Multiplexer for RA-RFM RI-MOD-TX8A Texas Instruments (TI) reserves the right to make changes to its products or services or to discontinue any product or service at any time without notice. TI provides cus- tomer assistance in various technical areas, but does not have full access to data concerning the use and applications of customer's products.
- Page 3 PREFACE Read This First About This Guide This manual describes the TIRIS 4-Channel Transmit/Receive Multiplexer (TX/RX MUX) Module RI-MOD-TX8A. It describes the module itself, how to install it and how to use it. Conventions WARNING: WARNING IS USED WHERE CARE MUST BE TAKEN OR A CERTAIN PROCEDURE MUST BE FOLLOWED IN ORDER TO PRE VENT INJURY OR HARM TO YOUR HEALTH...
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Page 4: Table Of Contents
S2000 RA-RFM MUX Module - Reference Guide July ’00 Document Overview Page Chapter 1: Product Description........5 Introduction.................. -
Page 5: Chapter 1: Product Description
CHAPTER 1 Product Description Chapter 1: Product Description This chapter will introduce you to the Multiplexer Module and the products with which it works. It also provides an overview of the function of the RA-RFM multiplexer. Topic Page Introduction ....................6 1.1.1 General ....................6 Product Description................... -
Page 6: Introduction
S2000 RA-RFM MUX Module - Reference Guide July ’00 Introduction 1.1.1 General This document provides information about the TIRIS 4-Channel Transmit/Receive Multiplexer (TX/RX MUX) Module RI-MOD-TX8A. It describes the module and how to install it. The multiplexer module allows the use of up to 4 transmit/receive (TX/RX) antennas with one Remote Antenna Radio Frequency Module (RA-RFM) System. -
Page 7: Figure 1: Top View
July ’00 Chapter 1. Product Description The multiplexer switches the selected Antenna to the RA-RFM. The multiplexer switches both the transmit and receive functions of the Antenna. Low resistance high voltage switches (MOSFETs) are used to switch the antenna connection because of the high voltage used during transmitting. -
Page 8: Figure 2: Block Diagram
S2000 RA-RFM MUX Module - Reference Guide July ’00 Figure 2: Block Diagram TX/RX TX/RX TX/RX TX/RX A N T Connection to RF Module antenna terminals G N D TX Channel Selection ENTX- GNDTX All multiplexed antennas have one common terminal, which is the antenna terminal ANT. -
Page 9: Chapter 2: Connectors And Jumpers
CHAPTER 2 Connectors and Jumpers Chapter 2: Connectors and Jumpers This chapter describes the connectors and jumpers on the multiplexer. Topic Page Connectors ....................10 Jumpers ....................12 2.2.1 Jumper J2 .................. 12 2.2.2 Jumper J5 .................. 12 2.2.3 Jumper J7 .................. 12... -
Page 10: Table 1: 1 Pin Functions
S2000 RA-RFM MUX Module - Reference Guide July ’00 Connectors Table 1 lists the pin functions for connector J1. The connector type is a 4-pin plug-in screw connector with 5.08 mm pin spacing. Table 2 lists the pin functions for the antenna screw block terminal J4. The multiplex- er is connected to the RA-RFM antenna terminals via connector J4. -
Page 11: Table 4: J6 Pin Functions
July ’00 Chapter 2. Connectors and Jumpers Table 3: J3 Pin Functions Pin# Signal Direction Description Switched antenna signal (switched to ground A_OUT2 IN/OUT GNDTX, when active). Connected to Tuning Board. Antenna resonator signal. Connected to Tuning IN/OUT Board. Switched antenna signal (switched to ground A_OUT1 IN/OUT GNDTX, when active). -
Page 12: Figure 4: Jumper Locations
S2000 RA-RFM MUX Module - Reference Guide July ’00 Jumpers There are 3 jumpers on the Multiplexer, for location of the jumpers please refer to Figure 4. The jumpers are described in detail following: Figure 4: Jumper Locations 2.2.1 Jumper J2 This jumper is used to enable all TX/RX channels. -
Page 13: Chapter 3: Specifications
CHAPTER 3 Specifications Chapter 3: Specifications This chapter provides the specific details that you will need in order to use the TIRIS 4-Channel Transmit/Receive Multiplexer (TX/RX MUX) Module RI-MOD-TX8A cor- rectly. It includes general data, electrical characteristics, timing characteristics and mechanical data. -
Page 14: Recommended Operating Conditions
S2000 RA-RFM MUX Module - Reference Guide July ’00 Recommended Operating Conditions These specifications are based on a free-air temperature of 25 ºC. Note: Free-air temperature: air temperature immediately surrounding the Multiplexer module. If the module is incorporated into a housing, it must be guaranteed by proper design or cooling that the internal tem- perature does not exceed the absolute maximum ratings. -
Page 15: Mechanical Data
July ’00 Chapter 3. Specifications CAUTION: Shorting the antenna terminals during operation may cause permanent damage to the RA-RFM. Mechanical data The mechanical size and weight is given in Table 6. Further mechanical details are provided in Figure 5. All of the measurements given in Figure 5 have a tolerance of ±... -
Page 16: Chapter 4: Installation And Use
CHAPTER 4 Installation & Use Chapter 4: Installation and Use This chapter provides the specific details that you will need in order to install the TI- RIS 4-Channel Transmit/Receive Multiplexer correctly. It includes a detailed descrip- tion of the power supply requirements, the antenna characteristics, the connecting cable and how to tune the antenna to resonance. -
Page 17: Connecting Multiplexer To Remote Antenna Rfm
July ’00 Chapter 4. Installation & Use Connecting Multiplexer to Remote Antenna RFM Figure 6 shows how the multiplexer should be connected to the RA-RFM and how the TX/RX antennas should be connected. If you wish to connect the antenna con- necting cable shields to ground at the reader end, the cable shields can be connect- ed together and then connected to pin 1 of the RA-RFM antenna connector. -
Page 18: Power Supply
S2000 RA-RFM MUX Module - Reference Guide July ’00 Note: Enabling a TX/RX channel enables both the transmit and receive function. However disabling a TX/RX channel only disables the Trans- mit function (charge-up of a transponder). The transmit function of a disabled channel is never completely switched off, as there is still some coupling of the antenna resonance voltage from the active channel to the disabled channels via the parasitic capacitance of the... -
Page 19: Connecting Cable
July ’00 Chapter 4. Installation & Use Table 7: Antenna Characteristics Parameter Conditions Min. typ. max. Unit Antenna inductance range, within which µH L_ANT the antenna can be tuned to resonance using the tuning coil on the RF Module Recommended quality factor of antenna Q_ANT coil for proper operation Connecting Cable... - Page 20 S2000 RA-RFM MUX Module - Reference Guide July ’00...
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