ISO/IEC 18046-2:2020

INTERNATIONAL ISO/IEC
STANDARD 18046-2
Second edition
2020-03
Information technology — Radio
frequency identification device
performance test methods —
Part 2:
Test methods for interrogator
performance
Technologies de l'information — Méthodes d'essai des performances
du dispositif d'identification par radiofréquence —
Partie 2: Méthodes d'essai des performances de l'interrogateur
Reference number
©
ISO/IEC 2020
© ISO/IEC 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO/IEC 2020 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 2
4.1 Symbols . 2
4.2 Abbreviated terms . 2
5 Conditions applicable to the test methods . 3
5.1 Number of interrogators to be tested. 3
5.2 Test environment . 3
5.3 RF environment . 3
5.4 Pre-conditioning . 3
5.5 Default tolerance . 3
5.6 Total measurement uncertainty . 3
5.7 Test result reporting . 4
5.8 Test communication parameters . 4
5.9 TE limits . 4
5.10 Human exposure to EMF . 4
6 Setup of TE for interrogator test . 4
6.1 Test apparatus and test circuits for ISO/IEC 18000-3 interrogators . 4
6.2 Test apparatus and test circuits for ISO/IEC 18000-61, ISO/IEC 18000-62, ISO/
IEC 18000-63, ISO/IEC 18000-64 interrogators . 5
6.3 Test apparatus and test circuits for ISO/IEC 18000-7 interrogators . 5
7 Functional tests for inductive interrogators as defined in ISO/IEC 18000-2 and ISO/
IEC 18000-3 . 7
7.1 Interrogator sensitivity in Listen mode (Receiving mode) . 7
7.1.1 Purpose . 7
7.1.2 Test procedure . 7
7.1.3 Test report . 7
7.2 Interference rejection (I ) . 8
Rejection
7.2.1 Purpose . 8
7.2.2 Test procedure . 8
7.2.3 Test report . 9
7.3 Maximum EMF exposure (E ) .10
max
7.3.1 Purpose .10
7.3.2 Test procedure .10
7.3.3 Test report .10
7.4 Ratio between field radiated and power consumption .10
7.4.1 Purpose .10
7.4.2 Test procedure .10
7.4.3 Test report .10
7.5 Field strength distribution .11
7.5.1 Purpose .11
7.5.2 Test procedure .11
7.5.3 Test report .11
8 Functional tests for interrogators as defined in ISO/IEC 18000-6 and in particular
ISO/IEC 18000-63 .12
8.1 Receiver sensitivity for UHF interrogators using wave propagation .12
8.1.1 Purpose .12
8.1.2 Test procedure .12
© ISO/IEC 2020 – All rights reserved iii

8.1.3 Test report .15
8.2 Inductive UHF interrogators .16
9 Functional tests for 433,920 MHz propagative interrogators as defined in ISO/
IEC 18000-7 .17
9.1 Identification electromagnetic field threshold (E ) and frequency
THR Identification
tolerance .17
9.1.1 Purpose .17
9.1.2 Test procedure .17
9.1.3 Test report .18
9.2 Reading/writing electromagnetic field threshold (E ) and frequency
THR Read/Write
tolerance .18
9.2.1 Purpose .18
9.2.2 Test procedure .18
9.2.3 Test report .19
9.3 Sensitivity directivity (S ) .20
Directivity
9.3.1 Purpose .20
9.3.2 Test procedure .20
9.3.3 Test report .21
9.4 Interference rejection (I ) .22
Rejection
9.4.1 Purpose .22
9.4.2 Test procedure .22
9.4.3 Test report .23
9.5 Maximum operating electromagnetic field (E ) .23
Max Operating
9.5.1 Purpose .23
9.5.2 Test procedure .23
9.5.3 Test report .24
9.6 Survival electromagnetic field (E ) .24
Survival
9.6.1 Purpose .24
9.6.2 Test procedure .25
9.6.3 Test report .25
Annexe A (normative) Backscatter power measurement .27
Bibliography .28
iv © ISO/IEC 2020 – All rights reserved

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that
are members of ISO or IEC participate in the development of International Standards through
technical committees established by the respective organization to deal with particular fields of
technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other
international organizations, governmental and non-governmental, in liaison with ISO and IEC, also
take part in the work.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for
the different types of document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject
of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent
rights. Details of any patent rights identified during the development of the document will be in the
Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents) or the IEC
list of patent declarations received (see http:// patents .iec .ch).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 31, Automatic identification and data capture techniques.
This second edition cancels and replaces the first edition (ISO/IEC 18046-2:2011), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— addition of test methods for UHF RFID in the 860-930 MHz in Clause 7.
A list of all parts in the ISO 18046 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO/IEC 2020 – All rights reserved v

Introduction
Radio frequency identification (RFID) technology has broad applicability to the automatic identification
and data capture (AIDC) industry in item management. As a wireless communication technique based
on radio frequency technology, the applications cover multiple levels of the industrial, commercial and
retail supply chains. These can include:
— freight containers,
— returnable transport items (RTI),
— transport units,
— product packaging, and
— product tagging.
Performance tests define test methods which deliver results that allow the comparison of different
RFID systems, interrogators and tags in order to select among them for use in a particular application.
The performance characteristics of devices (tags and interrogation equipment) can vary drastically due
to application factors as well as the particular RFID air interface (frequency, modulation, protocol, etc.)
being supported. Of key concern is the matching of the various performance characteristics to the user
application. Additionally, in an open environment, users of such technology demand multiple sources
for these devices from technology providers. A key challenge is a method of evaluating the differences
between various technology providers' products in a consistent and equitable manner.
This document provides a framework for meeting the above noted concerns and challenges. To this end,
clear definitions of performance as related to user application of RFID technology in the supply chain
are provided. Based on such application-based definitions, test methods are defined with attention to
the test parameters required for a consistent evaluation of RFID devices.
Of particular significance, these tests are defined for RFID devices with one antenna. It is common
practice to have products with both single and multiple antennae to define an RFID transaction zone
sufficient for the application. The defined test methods used are for a single antenna but can equivalently
be extended to equipment with multiple antennae, in order to evaluate performance under conditions
more closely matching those of a particular application. However, it is important to exercise care in
multiple-antenna measurement since multiple antennae can cause antenna-to-antenna interactions,
physical packaging limitations, mutual coupling issues, shadowing issues, directivity issues and other
impacts, even with respect to interrogators since these can be limited in size, shape and mounting
method for many RFID applications.
vi © ISO/IEC 2020 – All rights reserved

INTERNATIONAL STANDARD ISO/IEC 18046-2:2020(E)
Information technology — Radio frequency identification
device performance test methods —
Part 2:
Test methods for interrogator performance
1 Scope
This document defines test methods for performance characteristics of RFID interrogators and
specifies the general requirements and test requirements for interrogators which are applicable to the
selection of the devices for an application. The summary of the test reports forms a unified interrogator
datasheet.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/IEC 18000-2, Information technology — Radio frequency identification for item management —
Part 2: Parameters for air interface communications below 135 kHz
ISO/IEC 18000-3, Information technology — Radio frequency identification for item management —
Part 3: Parameters for air interface communications at 13,56 MHz
ISO/IEC 18000-7, Information technology — Radio frequency identification for item management — Part 7:
Parameters for active air interface communications at 433 MHz
ISO/IEC 18000-63, Information technology — Radio frequency identification for item management —
Part 63: Parameters for air interface communications at 860 MHz to 960 MHz Type C
ISO/IEC 19762, Information technology — Automatic identification and data capture (AIDC) techniques —
Harmonized vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 19762 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
© ISO/IEC 2020 – All rights reserved 1

4 Symbols and abbreviated terms
4.1 Symbols
E
electromagnetic field threshold
THR
E
identification electromagnetic field threshold
THR Identification
E
reading electromagnetic field threshold
THR Read
E
writing electromagnetic field threshold
THR Write
E
maximum electromagnetic field exposure
Max
E
maximum operating electromagnetic field
Max Operating
E
survival electromagnetic field
Survival
I
interference rejection
Rejection
D distance between the tag and the antenna
P
interrogator receiver sensitivity power level
rcv
P
tag backscatter power
back
P
interrogator transmit power
TX
P
power received on the spectrum analyser
r
f
antenna factor of the reference antenna
a
|ΔC| loss of cable
F
field strength
f
S
sensitivity directivity
Directivity
G antenna gain
f
frequency tag side band left
tsbl
f
frequency tag side band right
tsbr
4.2 Abbreviated terms
LM load modulation
EMF electromagnetic field
DUT device under test
MPE maximum permissible human exposure
SAR specific absorption rate
TE test equipment
RF radio frequency
2 © ISO/IEC 2020 – All rights reserved

RFID radio frequency identification
RTI returnable transport items
UHF ultra high frequency
AIDC automatic identification and data capture
BLF backscatter link frequency
UII unique item identifier
5 Conditions applicable to the test methods
5.1 Number of interrogators to be tested
All measurements defined in this document shall be performed at least on a single interrogator, but
higher sampling numbers can be required for statistical purposes.
5.2 Test environment
Unless otherwise specified, testing shall take place in an air environment of temperature (23 ± 3) °C
[(73 ± 5) °F] with relative humidity within the range of 40 % to 60 %.
5.3 RF environment
The tests shall be performed in a known RF environment.
For measurements of propagative UHF interrogators (see ISO/IEC 18000-63 and ISO/IEC 18000-7), an
anechoic chamber is the recommended test environment. The size of the anechoic chamber shall be
justified based on the dimensions of the test setup.
For measurement of inductive interrogators, a typical laboratory environment is sufficient, where
consideration is given to minimize the impact of electromagnetic sources that can influence the results.
5.4 Pre-conditioning
Where pre-conditioning is required by the test method, the identification interrogators to be tested
shall be conditioned to the test environment for a period of 24 hours before testing.
5.5 Default tolerance
Unless otherwise specified, a default tolerance of ±5 % shall be applied to the quantity values given to
specify the characteristics of the TE (e.g. linear dimensions) and the test method procedures (e.g. TE
adjustments).
For power values represented in dB or dBm, the tolerance shall be ±0,5 dB.
NOTE ±0,5 dB is approximately ±12 % of the non-logarithmics value.
5.6 Total measurement uncertainty
The total measurement uncertainty for each quantity determined by these test methods shall be stated
in the test report.
NOTE Basic information is given in ISO/IEC Guide 98-3.
© ISO/IEC 2020 – All rights reserved 3

5.7 Test result reporting
Each test result shall be reported with the DUTs tested. For statistical evaluation, optionally, the
minimum value, maximum value, mean value and standard deviation may be reported as well.
5.8 Test communication parameters
All of the tests may be carried out for various communication parameters (forward and return link).
The test conditions shall be recorded in the test report.
5.9 TE limits
TE for survival field maximum level shall be able to handle the maximum level declared by the product
vendor. It shall be ensured that the TE is not limiting the performance measurement.
5.10 Human exposure to EMF
High magnetic or electromagnetic field strength may exceed the limits of maximum permissible
human exposure to EMF, which should be considered accordingly. FCC guidelines for MPE and SAR or
EC 1999/519/CE are examples for relevant documents.
6 Setup of TE for interrogator test
6.1 Test apparatus and test circuits for ISO/IEC 18000-3 interrogators
The specification for ISO/IEC 18000-3 tags and interrogators specifies an operating frequency of
13,56 MHz ± 7 kHz. Since both the interrogator and the tag may be shifted by 516 ppm and potentially
in opposite directions, it is necessary for the interrogator to function with a tag simulator that may
be ±1032 ppm (±14 kHz) relative to the nominal centre frequency of the interrogator under test.
This frequency adjustment is made using only the tag simulator's signal source since there might be no
convenient way to adjust the frequency of the interrogator being evaluated. The relative interrogator to
tag frequency shift is still achieved using this method.
For convenience in setting up the signal source in the tag simulator, use a low carrier frequency at
13,546 MHz, a nominal centre frequency at 13,560 MHz, and a high carrier frequency at 13,574 MHz for
all frequency offset tests.
Unless defined differently in the test description, the set up of all TE shall be in an anechoic chamber
or some other fully characterized and controlled location that is free from interference sources and
propagation influences, such as significant signal reflections, absorptions, or blockages.
Unless otherwise specified, all the tests should be run using a known reference antenna attached to the
tag simulator.
The tag simulator used for these tests shall be able to receive interrogator commands and transmit
tag replies in conformance with ISO/IEC 18000-3. The command decoder needs to provide a signal to
trigger a properly timed response from the code generator so that the entire assembly acts as a tag
simulator.
The output of the decoder in the tag simulator is also connected to a computer and appropriate
monitoring software so that it can display the tag commands as received from the interrogator being
tested in order to confirm that it is sending correct commands.
The timing of the interrogator's transmitted signal and modulation can be monitored using the output
of the tag simulator's receiver attached to a storage scope that has sufficient memory depth to allow the
capture of complete interrogator/tag transactions.
4 © ISO/IEC 2020 – All rights reserved

The interrogator is connected to a control and monitoring computer that allows issuing of wakeup and
command transmissions. This software should also provide a display of decoded data received by the
interrogator to confirm that it is able to properly decode and output received tag responses.
Unless otherwise specified, the recommended test distance between the interrogator's location and
the reference antenna attached to the tag simulator should be 75 % of the maximum working distance
which can be obtained with the interrogator under test and the tag simulator.
6.2 Test apparatus and test circuits for ISO/IEC 18000-61, ISO/IEC 18000-62, ISO/
IEC 18000-63, ISO/IEC 18000-64 interrogators
The test apparatus and test circuits for ISO/IEC 18000-61, ISO/IEC 18000-62, ISO/IEC 18000-63,
ISO/IEC 18000-64 interrogator tests are defined in 8.1.
6.3 Test apparatus and test circuits for ISO/IEC 18000-7 interrogators
The specification for ISO/IEC 18000-7 tags and interrogators specifies an operating frequency of
433,920 MHz (±20 ppm), which is approximately ±8,7 kHz. Since both the interrogator and the tag may
be shifted by 20 ppm and potentially in opposite directions, the interrogator needs to function with a
tag simulator that may be ±40 ppm (approximately 17,4 kHz) relative to the nominal centre frequency
of the interrogator under test.
This frequency adjustment is made using only the tag simulator's signal source since there may be no
convenient way to adjust the frequency of the interrogator being evaluated. The relative interrogator to
tag frequency shift is still achieved using this method.
For convenience in setting up the signal source in the tag simulator, use a low carrier frequency at
433,900 MHz, a nominal centre frequency at 433,920 MHz, and a high carrier frequency at 433,940 MHz
for all frequency offset tests.
The setup of all TE shall be in an anechoic chamber or some other fully characterized and controlled
location that is free from interference sources and propagation influences, such as significant signal
reflections, absorptions, or blockages.
Unless otherwise specified, all the tests should be run using a known reference antenna attached to the
tag simulator through a splitter/combiner of a known loss as shown in Figure 1.
© ISO/IEC 2020 – All rights reserved 5

Figure 1 — Test setup for ISO/IEC 18000-7 interrogator measurements
A second reference antenna is located in the place of the interrogator at its test location and shall be
connected to a spectrum analyser at the beginning of testing with the tag simulator's signal source set
to 0 dBm output to establish the field strength, F , at the test site where the interrogator will be placed.
f
Calculation of field strength is as follows:
F = 107 + (P + f + |ΔC|)
f r a
where
107 is dB above 1 uV at 0 dBm,
P is the power received on the spectrum analyser,
r
f is the antenna factor of the reference antenna, and
a
|ΔC| is the loss of cable in dB (absolute value).
EXAMPLE P = −35 dBm, f = 22 dB, ΔC = |−1,2 dB|
r a
F = 107 + (−35 + 22 + 1,2) = 107 + (−11,8) = 95,2dBuV/m
f
The field strength at 0 dBm reference level shall be used during interrogator sensitivity testing.
The tag simulator used for these tests consists of a code generator conforming to ISO/IEC 18000-7, an
FSK modulated 433,920 MHz signal source, an FSK 433,920 MHz receiver, and a decoder conforming to
ISO/IEC 18000-7. The decoder needs to provide a signal to trigger a properly timed response from the
code generator so that the entire assembly acts as a tag simulator.
6 © ISO/IEC 2020 – All rights reserved

The step attenuator shown in the diagram allows adjustment over a 100 dB range in 1 dB steps. The
100 dB of output level change can be adjusted solely using the step attenuator or, as a practical matter,
using the level setting capabilities of both the attenuator and the FSK signal source.
The output of the decoder in the tag simulator is also connected to a computer and appropriate
monitoring software so that it can display the tag commands as received from the interrogator being
tested in order to confirm that it is sending correct commands.
The timing of the interrogator's transmitted signal and modulation can be monitored using the output
of the tag simulator's FSK receiver attached to a storage scope that has sufficient memory depth to
allow the capture of complete interrogator/tag transactions.
The interrogator is connected to a control and monitoring computer that allows the issuing of wakeup
and command transmissions. This software should also provide a display of decoded data received by
the interrogator to confirm that it is able to properly decode and output received tag responses.
Unless otherwise specified, the recommended test distance between the interrogator's location and
the reference antenna attached to the tag simulator should be 2 m, minimum, with 3 m preferred.
This will provide sufficient distance to ensure far field conditions at the interrogator's location yet not
require use of a test site exceeding practical dimensions. A 3 m test distance is recommended since
this is a common regulatory test distance and is also a distance at which many reference antennae
have been calibrated for antenna factor. This distance also meets the far field criteria at a frequency of
433,920 MHz.
7 Functional tests for inductive interrogators as defined in ISO/IEC 18000-2 and
ISO/IEC 18000-3
7.1 Interrogator sensitivity in Listen mode (Receiving mode)
7.1.1 Purpose
This test determines the minimum level of modulated carrier at the antenna of the interrogator that
can be detected by its receiver.
7.1.2 Test procedure
The LM of the tag simulator is set to the nominal level: 0.
The tag simulator is positioned on the axis of the interrogator's antenna. The distance between the tag
simulator and the interrogator's antenna (D) is equal to 75 % of the E distance.
THR Identification
The LM is then increased from 0 to the level where the interrogator starts to recognize the identification
data from the tag simulator.
7.1.3 Test report
The test report shall give the measured minimum LM. All parameters shall be recorded according to
Table 1.
© ISO/IEC 2020 – All rights reserved 7

Table 1 — Parameters recorded for sensitivity measurement
Test: Interrogator sensitivity in Listen mode (Receiving mode)
Temperature: Humidity:
Interrogator type: Interrogator ID:
Air interface protocol between interrogator and tag:
Test results
LM minimum xx,xx
7.2 Interference rejection (I )
Rejection
7.2.1 Purpose
This test determines the interference rejection ability of the interrogator.
This test determines the minimum distances between two identical interrogators (same devices) at
which the DUT can read the tag without disturbances.
7.2.2 Test procedure
The waveform generator shall be set to the required operating frequency of 125 kHz or 134,2 kHz or
13,56 MHz respectively for ISO/IEC 18000-2 or ISO/IEC 18000-3 and the waveform generator amplitude
shall be set to a value below the identification magnetic field threshold. This amplitude is typically zero.
The tag simulator is positioned on the axis of the interrogator's antenna. The distance between the tag
simulator and the interrogator's antenna (D) is equal to 75 % of the E distance.
THR Identification
A second interrogator (identical to the DUT) is positioned near the DUT. The test covers two positions:
face to face and side by side.
The test configurations are shown in Figure 2.
8 © ISO/IEC 2020 – All rights reserved

Figure 2 — Test configurations
The dialogue between the DUT and the tag simulator is monitored.
The 2nd interrogator is moved to the DUT until errors are detected in the dialogue between the DUT
and the tag simulator.
The dialogue shall alternate between read commands and write commands from the DUT to the tag
simulator.
7.2.3 Test report
The test report shall give the measured minimum distance between the two identical interrogators. All
parameters shall be recorded according to Table 2.
Table 2 — Parameters recorded for interference rejection distance
Test: Interrogator sensitivity in Listen mode (Receiving mode)
Temperature: Humidity:
Interrogator Type: Interrogator ID:
Air interface protocol between interrogator and tag:
Test results
Distance D1 (side by side) xx,xx
Distance D2 (face to face) xx,xx
© ISO/IEC 2020 – All rights reserved 9

7.3 Maximum EMF exposure (E )
max
7.3.1 Purpose
This test determines the maximum value of the EMF generated by another interrogator at which the
DUT ceases to operate.
7.3.2 Test procedure
The EMF generated for the test is similar to the field generated by the DUT (same frequency/modulation/
protocol). The strength of the EMF should be limited to the maximum allowed value (ETSI EN 300 330-
[30]
1/2 or 47CFR15 ).
Exposure time for this test is 1 min for each step of the test. The DUT shall be able to read a tag after
each exposure period.
7.3.3 Test report
The test report shall give the measured maximum electomagnetic field exposure, E . All parameters
max
shall be recorded according to Table 3.
Table 3 — Parameters recorded for maximum electomagnetic field exposure
Test: Maximum electromagnetic field exposure (E )
max
Temperature: Humidity:
Interrogator Type: Interrogator ID:
Air interface protocol between interrogator and tag:
Test results
E xx,xx A/m
max
7.4 Ratio between field radiated and power consumption
7.4.1 Purpose
This test determines a ratio between the field radiated and the power consumed by the interrogator.
7.4.2 Test procedure
The LM of the tag simulator is set to the level obtained as a result of test 7.1, interrogator sensitivity in
Listen mode (Receiving mode).
The tag simulator is positioned on the axis of the interrogator's antenna. The distance between the tag
simulator and the interrogator's antenna (D) is equal to 1 cm, 5 cm, 10 cm, 50 cm and finally 100 cm.
Measurements are expressed as follows:
— Measurement of the average power consumption of the interrogator when transmitting during
1 second: P1 in W (Watt).
— Measurement of the field strength: F in A/m.
f
The ratio between the field radiated and the power consumed is equal to F /P1.
f
7.4.3 Test report
The test report shall give the ratio between the field radiated and the power consumed by the
interrogator. All parameters shall be recorded according to Table 4.
10 © ISO/IEC 2020 – All rights reserved

Table 4 — Parameters recorded for power injected into the antenna
Test: Power injected into the antenna of the interrogator
Temperature: Humidity:
Interrogator type: Interrogator ID:
Air interface protocol between interrogator and tag:
Test results
Ratio (1 cm) xx,xx
Ratio (5 cm) xx,xx
Ratio (10 cm) xx,xx
Ratio (50 cm) xx,xx
Ratio (100 cm) xx,xx
7.5 Field strength distribution
7.5.1 Purpose
This test determines the 3D map of the EMF generated by the interrogator.
[30]
Interrogators should be grouped (as defined below) according to ETSI EN 300 330-1/2 and 47CFR15 .
In order to ease user comparison, 5 groups are defined:
— Class A interrogator with radiated H-field level between 80 % and 100 % of the maximum radiated
H-field allowed by local regulations;
— Class B interrogator with radiated H-field level between 60 % and 80 % of the maximum radiated
H-field allowed by local regulations;
— Class C interrogator with radiated H-field level between 40 % and 60 % of the maximum radiated
H-field allowed by local regulations;
— Class D interrogator with radiated H-field level between 20 % and 40 % of the maximum radiated
H-field allowed by local regulations;
— Class E interrogator with radiated H-field level between 0 % and 20 % of the maximum radiated
H-field allowed by local regulations.
7.5.2 Test procedure
Measurement should be performed using test procedures as outlined in ETSI EN 300 330-1/2 and
[30]
47CFR15 . This test gives a table of field strength measurements.
Measurements are performed every 1 cm in the normal direction if the value measured is higher than
0,15 A/m. Measurements in other directions are performed every 1 cm for positions in the normal
direction with a measured value higher than 0,15 A/m. Measurements in other directions shall be
performed if the value measured is higher than 0,15 A/m.
7.5.3 Test report
The test report shall give a table of EMF measurements. This allows the user to estimate the read range
in all directions in front of the interrogator antenna. All parameters shall be recorded according to the
example in Table 5.
© ISO/IEC 2020 – All rights reserved 11

Table 5 — Parameters recorded for power injected into the antenna
Test: Power injected into the antenna of the interrogator
Temperature: Humidity:
Interrogator type: Interrogator ID: Interrogator group:
Air interface protocol between interrogator and tag:
Test results
Other directions X and Y Y = xx Y = −1 Y = 0 Y = 1 Y = xx
X = xx xx,xx xx,xx xx,xx xx,xx xx,xx
X = −1 xx,xx xx,xx xx,xx xx,xx xx,xx
Normal direction – Z: 1
X = 0 xx,xx xx,xx xx,xx xx,xx xx,xx
X = 1 xx,xx xx,xx xx,xx xx,xx xx,xx
X = xx xx,xx xx,xx xx,xx xx,xx xx,xx

Other directions X and Y Y = xx Y = −1 Y = 0 Y = 1 Y = xx
X = xx xx,xx xx,xx xx,xx xx,xx xx,xx
Normal direction – Z: xx X = −1 xx,xx xx,xx xx,xx xx,xx xx,xx
X = 0 xx,xx xx,xx xx,xx xx,xx xx,xx
X = 1 xx,xx xx,xx xx,xx xx,xx xx,xx
X = xx
8 Functional tests for interrogators as defined in ISO/IEC 18000-6 and in
particular ISO/IEC 18000-63
8.1 Receiver sensitivity for UHF interrogators using wave propagation
8.1.1 Purpose
This test determines the interrogator receiver sensitivity power level, P , which is typically reported
rcv
in dB
...