Test Report

FCC ID: A92DCBMPR

Test Report

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FCCID_66399

FCC ID: A92DCBMPR

MEASUREMENT AND TECHNICAL REPORT
ON THE TEXAS INSTRUMENTS
ARC 13.56 MHz READER

Southwest Research Institute
6220 Culebra Road
San Antonio, Texas 78228-0510

Project 10-3169-001
Report Number EMCR 99/108

Prepared for:

Texas Instruments, Inc.
13536 North Central Expressway MS 457
Dallas, Texas 75243

Prepared by:
David A. Carmony

October 1999

Reviewed by: Approved by:

_______________________________________ ______________________________________
Ismael Martinez, Jr. James J. Polonis
Senior Engineering Technologist Manager
Electromagnetic Compatibility Research Section Electromagnetic Compatibility Research Section
Communications Engineering Department Communications Engineering Department

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TABLE OF CONTENTS

Page

List of Tables.......................................................................................................................................... 3

1.0 General Information.................................................................................................................... 4
1.1 Product Description.................................................................................................................... 4
1.2 Related Grants............................................................................................................................ 4
1.3 Tested System Details................................................................................................................. 4
1.4 Test Methodology....................................................................................................................... 5
1.5 Test Facility ............................................................................................................................... 5

2.0 Product Labeling ........................................................................................................................ 6
2.1 FCC ID Label ............................................................................................................................ 6
2.2 Location of Label on EUT .......................................................................................................... 6
2.3 Label for the Exterior of Devices Incorporating the EUT............................................................. 6
2.4 Supplemental Information to be in the Reader Manual................................................................. 6

3.0 System Test Configuration.......................................................................................................... 7
3.1 Justification................................................................................................................................ 7
3.2 EUT Exercise ............................................................................................................................ 7
3.3 Special Accessories .................................................................................................................... 7
3.4 Equipment Modification ............................................................................................................. 7
3.5 Configuration of Tested System .................................................................................................. 7
3.6 Antenna System.......................................................................................................................... 7

4.0 Block Diagram of the ARC 13.56 MHz Reader............................................................................ 8

5.0 Conducted and Radiated Measurement Photos................................................................... … … .. 9

6.0 Conducted Emission Data......................................................................................................... 10
6.1 Conducted Measurement Data .................................................................................................. 10
6.2 Conducted Test Instrumentation................................................................................................ 10

7.0 Radiated Emission Data............................................................................................................ 11
7.1 Radiated Measurement Data ..................................................................................................... 11
7.2 Test Instrumentation for Radiated Measurements ...................................................................... 15
7.3 Field Strength Calculation ........................................................................................................ 15

Appendix A: Conducted Emissions Measurement Plots.......................................................................... 16
Appendix B: Radiated Signature Measurement Plots.............................................................................. 19
Appendix C: Test Instrumentation ......................................................................................................... 25
Appendix D: Photos of Tested EUT....................................................................................................... 27
Appendix E: Photos of Test Setups........................................................................................................ 28

Attachment 1: Functional Description and Block Diagram
Attachment 2: FCC ID Label
Attachment 3: Schematics

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LIST OF TABLES

Table Page

1.1 ARC 13.56 MHz Reader Components ......................................................................................... 4
6.1 Worst Case Conducted Emission Levels..................................................................................... 10
7.1 Measurements of Fundamental Frequency.................................................................................. 11
7.2 Measurements of Spurious Emissions ........................................................................................ 11

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FCC ID: A92DCBMPR

1.0 GENERAL INFORMATION

1.1 Product Description

The Texas Instruments ARC 13.56 MHz Reader, FCC ID Number A92DCBMPR, allows
customers wishing to purchase motor fuel to interface directly with a fuel dispenser via a handheld
transponder. The ARC 13.56 MHz Reader transmits at 13.56 MHz which provides energy to the handheld
transponder causing it to reflect a signal (also at 13.56 MHz) containing the customer's data back to the
ARC 13.56 MHz Reader.

The Texas Instruments ARC (Automatic Recognition of Customer) 13.56 MHz Reader is a Radio
Frequency Identification Device (RFID) which is designed for use in conjunction with a handheld battery-
less transponder. The hand-held transponder is carried by the user. The transmitter portion of the ARC
13.56 MHz Reader operates at 13.56 MHz and is subject to FCC Part 15, Subpart C, “Intentional
Radiator,” paragraph 15.225 (13.553-13.567MHz). Radiated emissions from the intentional radiator
portion of the device is subject to the limits in Section 15.209 of the Rules outside of the 13.56 +/- 0.007
MHz band. Radiated emissions from the digital electronics portion of the device is subject to FCC Part 15,
Subpart B, ?Unintentional Radiator,? paragraph 15.109, under the Class A limits and as such, the device
is incorporated into an application that is subject to Class A limits. Conducted emissions from on the AC
power line are subject to FCC Part 15, Subpart C, ?Intentional Radiator,? paragraph 15.207. Table 1.1
lists the ARC 13.56 MHz Reader components.

1.2 Related Grants

There are no related grants.

1.3 Tested System Details

The ARC 13.56 MHz Reader is mounted into an enclosure such as a fueling dispenser and includes
two bezel-mounted 13.56 MHz low Q antennae, two Multi-Protocol Readers, a Data Control Board, a
Switched DC Power Supply and associated transformer. These components are listed in Table 1.1, and the
functional relationship is provided in block diagram in Attachment 1. The 13.56 MHz signal originates on
the Multi-Protocol Reader board (Texas Instruments part number RI-STU-TRDA-01) from which the
signal is sent via the Antenna Signal/Ground cable to the Bezel Antenna where it is intentionally radiated.
Attachment 1 contains a detailed technical description and functionality of the ARC 13.56 MHz Reader
and its components.

TABLE 1.1
ARC 13.56 MHz READER COMPONENTS

Component Description Texas Instruments Part No.
Data Control Board (DCB) RI-CTL-DCMA-02
Multi-Protocol Reader (2) RI-STU-TRDA-01
13.56 MHz Bezel Antenna (2) none
DC Power Supply
none
(Power One Model HC24-2.4-A)
Power Distribution Board (Dresser
none
Ind.,Wayne Div. 884599-001, Rev. 1)

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1.4 Test Methodology

Radiated and conducted testing was performed according to the procedures in ANSI C63.4-1992
and the limits prescribed in CFR 47, FCC Parts 15.109, 15.207, 15.209 and 15.225. Radiated testing was
performed at antenna to EUT distances of 3, 10, 20, and 30 meters.

1.5 Test Facility

The Open Area Test Site and Conducted Measurement Facility used to collect data are located at
Southwest Research Institute, 6220 Culebra Road, San Antonio, Texas. Details concerning these test sites
are found in the report entitled, "Description of Measurement Facility," dated 28 April 1997, which is on
file with the FCC Laboratory Division in Columbia, Maryland. On June 12, 1997, the FCC approved the
sites for the purpose of providing test results for submission with equipment authorization applications
under the Commission's Equipment Authorization Program.

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FCC ID: A92DCBMPR

2.0 PRODUCT LABELING
2.1 FCC ID Label
The FCC ID label is shown in the drawing in Attachment 2.
2.2 Location of Label on EUT
The location of the label is shown in the drawing in Attachment 2.

2.3 Label for the Exterior of Devices Incorporating the EUT
The ARC 13.56 MHz Reader will be incorporated in other devices such as a system housing. A
label will be supplied with the ARC 13.56 MHz Reader for placement on the exterior of the device in
which the equipment is incorporated. This label is shown in the drawing in Attachment 2.
2.4 Supplemental Information to be in the Reader Manual
In addition to reiteration of required information as an intentional radiator, in keeping with sections
15.21 and 15.105 of the FCC rules, the manual supplied with the ARC 13.56 MHz Reader will also
include the following admonitions:
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.
NO MODIFICATIONS: Modifications to this device shall not be made without the written
consent of Texas Instruments Incorporated. Unauthorized modifications may void the authority granted
under Federal Communications Commission Rules permitting the operation of this device.

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3.0 SYSTEM TEST CONFIGURATION

3.1 Justification

Radiated tests were performed on the ARC 13.56 MHz Reader intentional radiator from 13.56
MHz to 1 GHz for the highest fundamental and harmonics. Radiated tests were performed up to 1 GHz for
harmonics of the fundamental emission and spurious emissions related to the digital electronics portion of
the unit. Both vertical and horizontal polarizations were tested. Radiated signature scans were made at 3
meters in a shielded anechoic chamber.

3.2 EUT Exercise

The ARC 13.56 MHz Reader is powered by 115 VAC. The ARC 13.56 MHz Reader was
exercised by establishing the interrogation reply sequence using a handheld transponder.

3.3 Special Accessories

A CORCOM 10VR3 power line filter was installed on the ARC 13.56 MHz Reader AC power
line.

3.4 Equipment Modification

The requirement of the CORCOM 10VR3 power line filter was determined during conducted
emissions testing. The power line filter was required to meet the Part 15 conducted emission limits. A
photograph of the power line filter is provided in Appendix D.

3.5 Configuration of Tested System

Refer to Attachment 1 for block diagram of tested configuration. Refer to Appendix D for
photographs of the EUT test configuration.

3.6 Antenna Connector

This ARC 13.56 MHz Reader is intended for incorporation into other devices. It is not a consumer
device. It requires installation by a technician or assembly line worker trained in its installation in order to
properly install it in other devices. Because this is a device that inherently requires professional
installation, it complies with the requirements of Section 15.203 of the Commission’s Rules. The written
instructions packed with the device will explain the requirement for professional installation.

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4.0 BLOCK DIAGRAM OF THE ARC 13.56 MHz READER

Refer to Attachment 1 for a block diagram of the tested configuration.

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5.0 CONDUCTED AND RADIATED MEASUREMENT PHOTOS

Refer to Appendix E for photographs of the conducted and radiated test setups.

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7.0 RADIATED EMISSION DATA

The data below are the corrected highest level EME measurements taken from the following
radiated data sheets. The data sheets include the emission frequencies and the corrected level. An
explanation of the field strength calculation is given in paragraph 7.3.

7.1 Radiated Measurement Data

Measurements were made of the fundamental frequency of 13.56 MHz at 30 meters. Additionally,
the spectrum was investigated for harmonics and spurious emissions up to 30 MHz at 30 meters. No
harmonics or other spurious emissions were detected. The measurement level of the fundamental at the
center frequency, as well as the level of the fundamental at the band edges, is shown in Table 7.1.

TABLE 7.1
MEASUREMENTS OF FUNDAMENTAL FREQUENCY

Judgment: EUT Fundamental Passed by 32.2 dB
Band Edges passed by 2.2 dB
Frequency Corrected Level1 Limit
(MHz) dB(µV/m) dB(µV/m)
13.56 47.8 80 (30 meters)
13.5485 36.8 39 (10 meters)
13.5715 36.8 39 (10 meters)

1 All readings are quasi-peak manual measurements made with a receiver.

The spectrum from 30 MHz to 1 GHz was investigated for spurious emissions. The worst case
spurious emissions are given in Table 7.2. Peak signature scans are provided in Appendix B.

TABLE 7.2
MEASUREMENTS OF SPURIOUS EMISSIONS

Judgment EUT passed by 6.1 dB
Frequency Corrected Level 1 Limit “dB”
(MHz) dB (V/m) DB(V/m) Under limit
366.08 39.9 46 6.1
325.40 37.4 46 8.6
583.02 36.8 46 9.2
1 All readings are quasi-peak manual measurements made with a receiver.

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Radiated Emissions Test Data

FREQUENCY (MHz) 13.559 13.559 13.56 13.559 13.5485 13.5715

TRANSDUCER ALR-25 ALR-25 ALR-25 ALR-25 ALR-25 ALR-25

Antenna to DUT distance (meters) 30 30 30 10 10 10

Antenna height (meters) 1 1 1 1 1 1

POLARIZATION to DUT: ⊥ |
| = ⊥ ⊥ ⊥
Scanned 1
( |
|Parallel, ⊥ Perpendicular, = Parallel to Ground) 30 MHz, 3
109 109 109 109 109 109 polarizatio
SIGNAL DIRECTION (degrees)
other emis
RECEIVER ATTENUATION (dB) 0 0 0 0 0 0 detected.

METER (dBΦ V) 11.6 -7.4 -6.3 20.4 0.6 0.6

TRANSDUCER FACTOR (dB) 34.9 34.9 34.9 34.9 34.9 34.9

EXTERNAL GAIN/CABLE LOSS (dB) 1.3 1.3 1.3 1.3 1.3 1.3

CORRECTED LEVEL (dBΦ V/m) 47.8 28.8 29.9 56.6 36.8 36.8
1
LIMIT (dBΦ V/m) 80 80 80 901 39 391

Date: 8/31/99 Detection Method: _X_ CISPR ___ PEAK ___ AVERAGE ___ Other
Project No.: 10-3169-001 EUT: Texas Instruments
Test Category: FCC Part 15 OPR/Asst.: D.Smith
Temp, & %r.H: 90F/44RH
1
Used 20 dB per decade roll-off to adjust limit for closer distance.

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Radiated Emissions Test Data

FREQUENCY (MHz) 34.2 54.24 153.30 203.36 298.30 366.08 325.4

TRANSDUCER BDA-25 BDA-25 BDA-25 T-2 T-2 T-2

Antenna to DUT distance (meters) 3 3 3 3 3 3

Antenna height (meters) 4.14 2.34 4.14 1.34 1.56 2.4

POLARIZATION (V =Vertical H= Horizontal) H V H V H V

SIGNAL DIRECTION (ambient) 58Ε (ambient) 282Ε 217Ε 80Ε

RECEIVER ATTENUATION (dB) 0 0 0 0 0 0

METER (dBΦ V) 5.8 9.9 7.2 34.4 34.5 38.5

TRANSDUCER FACTOR (dB) 17 9.0 15.2 21.3 18.5 21.8

EXTERNAL GAIN/CABLE LOSS (dB) 2.1 2.6 4.6 -22.7 -21.1 -20.4

CORRECTED LEVEL (dBΦ V/m) 24.9 21.5 27.0 33.0 31.9 39.9
(ambient) (ambient)

LIMIT (dBΦ V/m) 40 40 43.5 43.5 46 46

Date: 8/31/99 Detection Method: _ X_ CISPR ___ PEAK ___ AVERAGE ___ Other
Project No.: 10-3169-001 EUT: Texas Instruments
Test Category: FCC Part 15 OPR/Asst.: D.Smith
Temp, & %r.H.: 90°F, 44%

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Radiated Emissions Test Data

FREQUENCY (MHz) 583.02 623.71

TRANSDUCER T-3 T-3

Antenna to DUT distance (meters) 3 3

Antenna height (meters) 2.62 1.48

POLARIZATION (V =Vertical H= Horizontal) H V

SIGNAL DIRECTION 246Ε 79Ε

RECEIVER ATTENUATION (dB) 0 0

METER (dBΦ V) 30.0 25.0

TRANSDUCER FACTOR (dB) 23.8 23.5

EXTERNAL GAIN/CABLE LOSS (dB) -17.0 -16.6

CORRECTED LEVEL (dBΦ V/m) 36.8 31.9

LIMIT (dBΦ V/m) 46 46

Date: 8/31/99 Detection Method: _ X_ CISPR ___ PEAK ___ AVERAGE ___ Other
Project No.: 10-3169-001 EUT: Texas Instruments
Test Category: FCC Part 15 OPR/Asst.: D.Smith
Temp, & %r.H.: 90°F, 44%

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The frequency tolerance of the ARC 13.56 MHz Reader 13.56 MHz fundamental emission was
verified to be within the +/-0.01% (+/-1.356 kHz) requirement from Part 15, paragraph 15.225, when
exposed to temperature variations of –20 degrees to +50 degrees C. The fundamental emission was
monitored on a spectrum analyzer as the ARC 13.56 MHz Reader was exposed to +50 degrees C for 10
minutes, and then –20 degrees C for 10 minutes, in accordance with the procedure in ANSI C63.4-1992,
paragraph 13.1.6.1. The frequency varied by approximately +/-1.000 kHz. In addition, the 115 VAC
supply voltage was varied from 85% to 115% at room temperature in accordance with paragraph 15.225.
The frequency of the fundamental emission did not vary more than approximately 280 Hz during the entire
procedure.

7.2 Test Instrumentation for Radiated Measurements

Scans were made at an open area test site (OATS) and in an RF semi-anechoic chamber 28' long x
16' wide x 16' high with its interior lined on the ceiling and four walls with pyramidal absorber material up
to four feet in length. Measurements were made with a spectrum analyzer and a quasi-peak adapter in the
anechoic chamber and with a receiver at the OATS. The list of test instrumentation used to perform the
testing is shown in Appendix C.

7.3 Field Strength Calculation

The field strength was calculated by adding the antenna factor and cable factor, and subtracting the
amplifier gain (when used) from the measured reading. The basic equation with a sample calculation is
provided below:

FS = RA + AF + CF - AG
Where FS = Field Strength
RA = Receiver Amplitude
AF = Antenna Factor
CF = Cable Attenuation
AG = Amplifier Gain

For example, reducing the 13.56 MHz measurement on the data sheet on page 12 (first column) yields:

11.6 dB (µV)
34.9 dB (1/m)
1.3 dB (CF/AG FACTOR)
FS = 47.8 dB (µV/m)

To equation convert the dB (µV/m) value to its corresponding level in µV/m is as follows:

Level in µV/m Common Antilogarithm [(47.8 dB µV/m)/20] = 245 µV/m

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APPENDIX A

CONDUCTED EMISSIONS MEASUREMENTS PLOTS

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APPENDIX B

RADIATED SIGNATURE MEASUREMENTS PLOTS

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APPENDIX C

TEST INSTRUMENTATION

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APPENDIX D

PHOTOS OF TESTED EUT

File Name EUT Photo

pic00021.jpg ARC 13.56 MHz Reader test box with EMI Power Line Filter

filter.jpg EMI Power Line Filter

pic00024.jpg ARC 13.56 MHz Reader test box disassembled

pic00023.jpg View of bezel antenna and Multiprotocol Reader in test box

pic00028.jpg Antenna and Multiprotocol Reader assembled on faceplate of test box

Antenna T&B.jpg 13.56 MHz Reader Bezel Antenna Board Assembly

pic00027.jpg Power supply and power distribution board in test box

pic00025.jpg ARC 13.56 MHz Reader Power Supply

pic00026.jpg Digital Control Board with cables; assembled on bracket

tiboards.jpg Top view of Digital Control Board Assembly

tiboard1b.jpg Bottom view of Digital Control Board Assembly

timprv14t.jpg Top view of Multiprotocol Reader (TI P/N RI-STU-TRDA-01)

timprv14b.jpg Bottom view of Multiprotocol Reader (TI P/N RI-STU-TRDA-01)

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APPENDIX E

PHOTOS OF TEST SETUPS

Test Setup File Name

Radiated Emissions Radiated 1.jpg

Radiated Emissions Radiated 2.jpg

Radiated Emissions Radiated 3.jpg

Radiated Emissions Radiated 4.jpg

Conducted Emissions Conducted 1.jpg

Conducted Emissions Conducted 2.jpg

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Document Modified: 2019-11-14 05:55:38

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