SIST TBR 007 E2:2004

SLOVENSKI STANDARD
01-oktober-2004
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Electromagnetic compatibility and Radio spectrum Matters (ERM); Enhanced Radio
MEssage System (ERMES); Receiver requirements
Ta slovenski standard je istoveten z: TBR 007 Edition 2
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL TBR 7
BASIS for December 1997
REGULATION Second Edition
Source: ERM Reference: RTBR/ERM-RP04-008
ICS: 33.020
Key words: ERMES, paging, radio, type approval
Electromagnetic Compatibility
and Radio spectrum Matters (ERM);
Enhanced Radio MEssage System (ERMES);
Receiver requirements
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1997. All rights reserved.

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TBR 7: December 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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TBR 7: December 1997
Contents
Foreword .7
1 Scope .9
2 Normative references.9
3 Definitions, abbreviations and symbols.10
3.1 Introduction .10
3.2 Vocabulary .10
3.2.1 Administrative terms.10
3.2.2 Identity related terms.10
3.2.3 Services, facilities and receiver features.10
3.2.4 Network related terms .10
3.2.5 Area concepts .11
3.2.6 Terms related to the radio subsystem.11
3.3 Abbreviations and acronyms.11
3.4 Symbols .12
4 General.12
4.1 Introduction .12
4.2 Choice of model for approval testing .12
4.3 Description of equipment .12
4.3.1 Manufacturer's declaration .12
4.4 Mechanical and electrical design.13
4.5 Categories and classes of receivers.13
4.5.1 Categories of receivers .13
4.5.2 Classes of receivers.13
4.6 Requirements and justifications.14
4.6.1 Average usable sensitivity (normal) .14
4.6.2 Degradation in required sensitivity under channel switching.14
4.6.3 Degradation in required sensitivity in extremes and offset.14
4.6.4 Co-channel rejection (normal).14
4.6.5 Adjacent channel selectivity (normal).15
4.6.6 Adjacent channel selectivity (extreme).15
4.6.7 Spurious response immunity.15
4.6.8 Intermodulation immunity .15
4.6.9 Blocking immunity or desensitisation .16
4.6.10 Usable input range .16
4.6.11 The maximum degradation in required sensitivity for combined multi-path
and quasi-synchronous transmissions .16
4.6.12 Spurious emissions .17
4.6.13 Last message in batch .17
4.6.14 Message continued in next batch.17
4.6.15 Message in last available batch .17
4.6.16 Tenure of message .17
4.6.17 Two messages in the same batch.17
4.6.18 Message continued in the next sub-sequence.18
4.6.19 Message reception on all ERMES channels .18
4.6.20 Recognition of zone code.18
4.6.21 Two messages in the same batch.18
4.6.22 Message in overlap areas (BAI = 1).18
4.6.23 Message in overlap areas (BAI = 0).19
4.6.24 Receiver paging categories.19
4.6.24.1 Tone-only functions .19
4.6.24.2 Numeric category functions .19
4.6.24.3 Alphanumeric category functions .19
4.6.25 Termination of numeric messages due to reception errors.19

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TBR 7: December 1997
4.6.26 Termination of alphanumeric messages due to reception errors . 20
4.6.27 Group call . 20
4.6.28 Tenure of group messages. 20
4.6.29 Recognition of Frequency Subset Indicator (FSI). 20
4.6.30 Multioperator environment. 20
4.6.31 RSVD bits . 20
4.6.32 Additional features . 21
4.7 Interpretation of measurement results . 21
5 General test requirements . 21
5.1 Test philosophy . 21
5.2 Receiver to be submitted for conformance testing. 21
5.3 Normal test conditions.21
5.4 Extreme test conditions. 22
5.5 Test fixture . 22
5.6 Test paging signal . 22
5.6.1 Successful tone-only call . 22
5.6.2 Successful numeric message. 22
5.6.3 Successful alphanumeric message. 22
5.7 Declared category . 22
5.7.1 General . 22
5.7.2 Test time saving procedure . 23
6 TBR requirements table. 24
7 Tests for radio parameter conformance . 25
7.1 Conformance requirements . 25
7.2 Method of measurement . 25
8 Tests for radio interface conformance. 26
8.1 Last message in batch . 27
8.2 Message continued in next batch. 28
8.3 Message in last available batch . 28
8.4 Tenure of message . 29
8.5 Two messages in same batch . 29
8.6 Message continued in the next sub-sequence. 29
8.7 Message reception on all ERMES channels . 30
8.8 Recognition of zone code. 30
8.9 Two messages in the same batch . 30
8.10 Message reception in overlap regions (BAI = 1) . 30
8.11 Message reception in overlap regions (BAI = 0) . 31
8.12 Messages. 31
8.12.1 Tone message (alert signal indicator bits "000") . 31
8.12.2 Maximum length numeric message. 31
8.12.3 Maximum length alphanumeric message. 32
8.13 Termination of numeric messages due to reception errors . 32
8.14 Termination of alphanumeric messages. 32
8.15 Group call. 33
8.16 Tenure of group message. 33
8.17 Recognition of FSI. 34
8.18 Multioperator environment. 34
Annex A (normative): Measurement procedures. 35
A.1 Average measured usable sensitivity expressed as field strength under normal conditions. 35
A.1.1 Definition . 35
A.1.2 Method of measurement . 35
A.2 Radiated spurious components . 36
A.2.1 Definition . 36
A.2.2 Method of measurement . 36
A.3 Co-channel rejection. 37

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TBR 7: December 1997
A.3.1 Definition.37
A.3.2 Method of measurement.37
A.4 Adjacent channel selectivity .38
A.4.1 Definition.38
A.4.2 Method of measurement.38
A.5 Spurious response immunity.39
A.5.1 Definition.39
A.5.2 Method of measurement.39
A.6 Intermodulation immunity .39
A.6.1 Definition.39
A.6.2 Method of measurement.40
A.7 Blocking immunity .41
A.7.1 Definition.41
A.7.2 Method of measurement.41
A.8 Combined multi-path and quasi-synchronous transmissions.42
A.8.1 Definition.42
A.8.2 Method of measurement.42
Annex B (normative): Ancillary test data .43
B.1 Simulated man .43
B.2 Definition of unwanted test signal.43
B.3 Definition of reference figure .43
B.4 Sensitivity measurement test sites.44
B.4.1 Description of test sites for receiver sensitivity measurements .44
B.4.2 Description of an open air test site .44
B.4.2.1 Receiver sensitivity measurement test site characteristics.44
B.4.2.2 Receiver sensitivity measurement test site .44
B.4.2.3 Position of the equipment under test.45
B.4.2.4 Transmitting antenna.45
B.4.2.5 Calibration .46
B.4.2.6 Substitution antenna.46
B.4.2.7 Selective measuring device.46
B.4.3 Description of an anechoic chamber .46
B.5 Definition of test sites suitable for spurious emissions measurements.46
B.5.1 An anechoic chamber .46
B.5.1.1 General.46
B.5.1.2 Description .47
B.5.1.3 Influence of parasitic reflections.48
B.5.1.4 Calibration and mode of use .48
B.5.2 Open air test site suitable for emission tests .50
B.5.2.1 Test site characteristics for radiated emissions testing.51
B.5.2.2 Radiation emissions test site.51
B.5.2.3 Position of the equipment under test.52
B.5.2.4 Measuring antenna support.52
B.5.2.5 Measuring antenna.52
B.5.2.6 Substitution antenna.53
B.5.2.7 Radio-frequency signal generator .53
B.5.2.8 Selective measuring device.53
B.6 Description of test fixtures.53
B.6.1 Test fixture to be used for testing according to all subclauses except subclauses 4.6.3
and 4.6.6.53
B.6.2 Test fixture to be used for testing subclauses 4.6.3 and 4.6.6 .53

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TBR 7: December 1997
B.7 Measurement uncertainty . 54
B.8 Maximum degradation in required sensitivity. 54
B.9 Differential factors. 54
B.9.1 General. 54
B.9.2 Definition of numeric differential factor. 55
B.9.3 Definition of alphanumeric differential factor. 55
B.10 Calculations of spurious responses frequencies .56
B.10.1 Introduction to the method .56
Annex C (normative): Character sets in the ERMES system . 57
C.1 Characters for numeric paging . 57
C.2 Characters for alphanumeric paging . 58
History. 59

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TBR 7: December 1997
Foreword
This second edition Technical Basis for Regulation (TBR) has been produced by the Radio Equipment
and Systems (RES) Technical Committee of the European Telecommunications Standards Institute
(ETSI).
This TBR covers the requirements for terminal (mobile) equipment for use within the Enhanced Radio
MEssage System (ERMES).
This TBR contains the procedures and requirements for the approval testing of ERMES terminal (mobile)
equipment which are mainly intended to be body worn.
The ERMES equipment to be approved is not intended to be physically attached to the public network.
This TBR is based on ETS 300 133-4 [2] and ETS 300 133-5 [3].
This TBR also includes a vocabulary of terms and a list of abbreviations and acronyms.
Annexes A, B and C are normative and therefore integral parts of this TBR.
ETSI Interim Intellectual Property Rights (IPR) Policy
The attention of ETSI has been drawn to the Intellectual Property Rights (IPRs) listed below which are,
or may be, or may become, essential to the present standard. The IPR owner has undertaken to grant
irrevocable licences on fair, reasonable and non-discriminatory terms and conditions to these IPRs
pursuant to the ETSI Interim IPR Policy. Further details pertaining to these IPRs can be obtained directly
from the IPR owner.
The present information is accurate to the best of ETSI's knowledge. Pursuant to the ETSI Interim IPR
Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given
as to the existence of other IPRs, which are, or may be, or may become, essential to the present
standard.
IPRs:
EP Patent No. 0090851: Decoder for Transmitted Message Activation Codes;
EP App. No. 89909668,9: Multiple Frequency Message System;
EP App. No. 89913131,2: Power Conservation Method and Apparatus for a Portion of Information Signal;
EP App. No. 92901376,1: Multiple Format Signalling Protocol for a Selective Call Receiver;
EP App. No. 90915018,7: Nation-wide Paging with Local Modes of Operation;
EP App. No. 91904526,0: Multiple Frequency Scanning.
IPR owner:
MOTOROLA Ltd, 110 Bath Road, Slough, GB-BERKSHIRE SL1 3SZ

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TBR 7: December 1997
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TBR 7: December 1997
1 Scope
This Technical Basis for Regulation (TBR) specifies the technical characteristics to be provided by
Enhanced Radio MEssage System (ERMES) terminal equipment, which are mainly intended to be body
worn and are capable of the reception and decoding of signals transmitted according to the ERMES
standard, as described in ETS 300 133-4 [2].
The objective of this TBR is to ensure that ERMES terminal equipment meets the essential requirements
as laid down in terms of the Directive 91/263/EEC [6], articles 4d to 4g.
There are no specific EMC requirements included in this TBR for Article 4c of Directive 91/263/EEC [6].
The general EMC requirements for ERMES are included in ETS 300 340 [9].
2 Normative references
This TBR incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this TBR only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies.
[1] ETS 300 133-2 (1997): "Electromagnetic compatibility and Radio spectrum
Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 2: Service
aspects".
[2] ETS 300 133-4 (1997): "Electromagnetic compatibility and Radio spectrum
Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 4: Air
interface specification".
[3] ETS 300 133-5 (1997): "Electromagnetic compatibility and Radio spectrum
Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 5: Receiver
conformance specification".
[4] ISO Standard 1073 parts 1 & 2: "Alphanumeric character sets for optical
recognition".
[5] CTR Scope (5/3/92): "European Radio Message System (ERMES) - Approval
requirements for paging receivers" (NTRAC).
[6] Official Journal of the European Communities Volume 34, 23 May 1991:
"Council Directive 91/263 /EEC of 29 April 1991 on the approximation of the
laws of the Member States concerning telecommunications terminal equipment,
including the mutual recognition of their conformity".
[7] ETS 300 133-6 (1997): "Electromagnetic compatibility and Radio spectrum
Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 6: Base
station conformance specification".
[8] ETR 028: "Radio Equipment and Systems (RES) - Uncertainties in the
measurement of mobile radio equipment characteristics".
[9] ETS 300 340: "Radio Equipment and Systems (RES); Electro-Magnetic
Compatibility (EMC) for European Radio Message System (ERMES) paging
receivers".
[10] ITU-T Recommendation E.212: "Identification plan for land mobile stations".
[11] ETR 027 (1991): "Radio Equipment and Systems (RES); Methods of
measurement for private mobile radio equipment".

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TBR 7: December 1997
3 Definitions, abbreviations and symbols
3.1 Introduction
The terms, definitions and abbreviations used within this TBR are given in this clause. A definition or a
reference to a definition given in this clause is valid for all clauses of this TBR.
An explanation of all the abbreviations and acronyms used in this TBR is given in alphabetical order in
subclause 3.3.
The definitions are presented in six groups. Within each group the definitions are given in a conceptual
order rather than alphabetical order.
3.2 Vocabulary
3.2.1 Administrative terms
user: A person or machine initiating an access to the operator network or receiving a message through
the operator network. User includes mobile subscribers, fixed subscribers and non-registered customers.
network operator: The administration/company which is responsible for the technical and commercial
operation of the operator network.
home operator: The network operator to which a specific user has subscribed.
3.2.2 Identity related terms
basic Radio Identity Code (RIC): The prime identity of the paging receiver allocated by the network
operator when service is initiated. It can not be changed without safeguards against unauthorised
changes.
country code: Binary representation of the country number defined in ITU-T Recommendation
E.212, annex A [10]. The country code consists of 7 bits.
initial address: The 18 most significant bits of the local address.
operator identity: The number used by the system on the radio path to identify the home operator of a
receiver. It has a total length of 13 bits and consists of three parts, the zone code, the country code and
the operator code.
operator code: The number used by the system to identify an operator within a country. It consists of
3 bits.
Radio Identity Code (RIC): The number used by the system on the radio path to identify the receiver(s)
for which the paging signal is intended. RIC has a total length of 35 bits and consists of four parts: The
zone code (3 bits) the country code (7 bits), the operator code (3 bits) and the local address (22 bits).
zone code: Binary representation of the zone number defined in ITU-T Recommendation
E.212, annex A [10]. The zone code consists of 3 bits.
3.2.3 Services, facilities and receiver features
group call: A call intended for two or more mobile subscribers.
3.2.4 Network related terms
ERMES system: The totality of the operator networks.
home network: The operator network with which a mobile subscriber has signed a subscription.

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3.2.5 Area concepts
paging area: The area controlled by a Paging Area Controller (PAC). It is the minimum area to which a
mobile subscriber is permitted to subscribe in order to receive his paging messages.
3.2.6 Terms related to the radio subsystem
alert signal: The signal generated by the receiver as an indication of a received paging signal.
alert signal indicator: The information bits contained in the I1 message header that determines which
alert signal should be generated at the receiver. It is related to the address code input by the calling party.
batch number: The 4 bit number corresponding to a particular batch type. Batch type A corresponds to
batch number 0000. Batch type P corresponds to batch number 1111.
batch type: The letter (A to P) which identifies one of the 16 batches within a sub-sequence.
code word: The standard information unit of 30 bits length (used on the air interface).
code block: The unit of nine interleaved code words used in the message partition of the air interface.
End Of Message (EOM) character: A specific character used to indicate the end of an alphanumeric
message. It corresponds to DC1 as defined in ETS 300 133-2 [1], clause B.2.
paging signal: The signal sent on the radio path to a paging receiver.
3.3 Abbreviations and acronyms
For the purposes of this TBR, the following abbreviations apply:
AII Additional Information Indicator
BAI Border Area Indicator
BER Bit Error Ratio
CTAP Common Temporary Address Pointer
EB External Bit
EOM End of Message
ERMES Enhanced Radio MEssage System
ETI External Traffic Indicator
EUT Equipment Under Test
FSI Frequency Subset Indicator
FSN Frequency Subset Number
IA Initial Address
LCD Liquid Crystal Display
MD Message Delimiter
OPID Operator Identity (of the home operator)
PA Paging Area
PAC Paging Area Controller
RF Radio Frequency
RIC Radio Identity Code
rms root mean square
RSVD Reserved bits for future definition
SSI Supplementary System Information
TBR-RT Technical Basis for Regulation - Requirements Table
VSWR Voltage Standing Wave Ratio

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3.4 Symbols
For the purposes of this TBR, the following symbols apply:
APT address partition terminator
PR preamble word
SI system information word
SSI supplementary system information word
SYN synchronization word
4 General
4.1 Introduction
This TBR is based on the CTR Scope statement [5] from NTRAC on CTR No. 7.
This TBR specifies the receiver conformance requirements and the considered relevance of the Articles
from the directive 91/263/EEC [6] with regard to ERMES receivers. The CTR Scope statement suggests
that this TBR should only consider Articles 4e, 4f, and 4g. Article 4a is dealt with under the Low Voltage
Directive (73/23/EEC), while Articles 4b and 4d are considered not relevant for this TBR. In the TBR
Requirements Table (TBR-RT) given in clause 6, the tests to be carried out on ERMES receivers are
tabulated.
4.2 Choice of model for approval testing
The applicant shall provide one preliminary or production model of the equipment, as appropriate for
approval testing.
If approval is given on the basis of tests on a preliminary model, then the corresponding production
models shall be identical in all respects to the preliminary model tested.
4.3 Description of equipment
The applicant shall provide the following information to the test laboratory.
4.3.1 Manufacturer's declaration
A declaration by the manufacturers or applicant shall be supplied detailing the following parameters:
a) the normal and extreme test voltages, see ETS 300 133-5 [3], subclauses 4.2 and 4.3;
b) any combination of the control characters ESC, LF and CR and any other character which should
not be used for test in subclause 4.6.24.3, see ETS 300 133-5 [3], subclause 7.3;
c) a statement demonstrating that no combination of the Reserved bits for future definition (RSVD)
bits affects the performance of the receiver with respect to this TBR, subclause 4.6.31;
d) the method to simulate insufficient quality of reception (Bit Error Ratio (BER), code word error rate,
erroneous system information) and the time constraints to be used in the test in subclause 8.11,
see ETS 300 133-5 [3] subclause 7.2.5;
e) a statement demonstrating that any features in the receiver that are additional to the requirements
of this TBR do not affect the performance of the receiver with respect to this TBR, see
subclause 4.6.32;
f) there will be a certain minimum time after a receiver is switched on before it is capable of receiving
messages as described in the tests in clause 6. It is required that this time is stated, see
ETS 300 133-5 [3] subclause 7.12.1;
g) the category of receiver shall be declared (see subclause 4.5);

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TBR 7: December 1997
h) the alerts associated with all the alert signal indicator bit sequences shall be declared. In addition
the means whereby these alerts may be tested shall be explained. If any additional equipment is
required to test these alerts, then this shall be supplied by the manufacturer, see ETS 300 133-5 [3]
subclause 6.3.1;
j) the message presentation technique shall be declared by the manufacturer. This is required to
enable the test laboratory to test the message function;
k) the receiver shall have a basic RIC. The manufacturer shall declare that this RIC is within the
definition in ETS 300 133-4 [2], clause 3;
l) the reference orientation that shall be close to the orientation in normal use;
m) for the calculations of spurious response measurement the manufacturer shall state the frequency
of the oscillator signal applied to the first mixer of the receiver, the intermediate frequencies of the
receiver and the switching range;
n) the time required by the receiver to achieve synchronization before the radio performance criteria
may be determined;
p) the time during which the receiver remains on channel after loss of signal;
q) the intended use of the receiver shall be declared as either being body worn (class 1) or non body
worn (class 2) (see subclause 4.5.2).
4.4 Mechanical and electrical design
Any control or adjustment which, if maladjusted, could affect the conformance of the product to this TBR
shall not be readily accessible to the user.
4.5 Categories and classes of receivers
4.5.1 Categories of receivers
There are four categories of receivers, according to the different paging services they are designed to
provide. Table 1 describes each of the four categories.
Table 1: Categories of receivers
Category Description
1 A receiver providing this function shall respond to at least one combination of the alert
signal indicator bits. Responses to the remaining seven alert indicator bits shall (if
implemented) be clearly distinguishable.
2 A receiver including this function shall provide for the reception of a 20 digit numeric
message. The numeric character set is included in annex C. Receivers having this
function shall also have the tone-only function.
3 A receiver including this function shall provide for the reception of a 400 character text
message. The alphanumeric character set is included in annex C. Receivers having this
function shall also have the numeric and the tone-only functions.
4 A receiver including this function shall provide for the reception of an arbitrary data
message.
4.5.2 Classes of receivers
Paging receivers are divided into classes according to their intended use as shown in table 2.
Table 2: Classes of paging receiver
Body worn Non body worn
Class 1 2
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TBR 7: December 1997
4.6 Requirements and justifications
4.6.1 Average usable sensitivity (normal)
The receiver under test shall meet the specifications as defined in subclause 7.1 a).
The receiver is required to meet the above specification in order to provide a sufficient call success rate
under static field conditions when the transmitted field strength is at the defined level. This level has been
chosen as a suitable limit level when economic, technical and regulatory considerations are taken into
account. Therefore receivers shall meet the specification as defined in subclause 7.1 a) and measured as
defined in subclause 7.2 a).
Reference:
ETS 300 133-5 [3], subclause 5.1 a).
4.6.2 Degradation in required sensitivity under channel switching
The receiver under test shall meet the specifications as defined in subclause 7.1 b).
One of the essential features of the ERMES system is that the paging messages are distributed in a
multiple frequency environment. It is therefore required that the receivers maintain their sensitivity to
paging messages while they are scanning through the frequencies used in the system as defined in
subclause 7.1 b) and measured as defined in subclause 7.2 l).
Reference:
ETS 300 133-5 [3], subclause 5.1 c).
4.6.3 Degradation in required sensitivity in extremes and offset
The receiver under test shall meet the specifications as defined in subclause 7.1 c).
The operating temperature range for the receiver is -10°C to +55°C. This range should cover the range of
temperatures normally experienced in Europe by a body worn product. The receiver under test is primarily
intended to be portable and therefore its power is derived from a battery. During the life of this battery, its
terminal voltage may change, and to ensure that the performance of the receiver is not impaired
unreasonably, this test includes measuring the sensitivity of the receiver at the extreme test voltage as
specified by the manufacturer. In the transmitter system that may be used for an ERMES network, the
transmitted frequencies can be up to 200 Hz offset from the nominal frequencies (see ETS 300 133-6 [7],
subclause 5.3). The receiver shall continue to receive paging messages at the extremes of the
temperature and voltage range (as specified in subclause 5.4) and with a transmitter frequency offset of
200 Hz as defined in subclause 7.1 c) and measured as defined in subclause 7.2 c).
References:
ETS 300 133-5 [3], subclause 5.1 e).
ETS 300 133-6 [7], subclause 5.3.
4.6.4 Co-channel rejection (normal)
The receiver under test shall meet the specifications as defined in subclause 7.1 d).
In the transmitter system that may be used for an ERMES network, the receiver can receive signal from
two transmitters on the same frequency, but with different data being transmitted. In order that paging
messages can still be received under these conditions, the receiver shall meet the specification as defined
in subclause 7.1 d) and measured as defined in subclause 7.2 e).
Reference:
ETS 300 133-5 [3], subclause 5.1 f).

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TBR 7: December 1997
4.6.5 Adjacent channel selectivity (normal)
The receiver under test shall meet the specifications as defined in subclause 7.1 e).
In the transmitter system that may be used for an ERMES network, a receiver can suffer from radio
interference from a signal being transmitted on a channel adjacent to the required channel. In order that
paging messages can still be received under these conditions, the receiver shall meet the specification as
defined in subclause 7.1 e) and measured as defined in subclause 7.2 f).
Reference:
ETS 300 133-5 [3], subclause 5.1 g).
4.6.6 Adjacent channel selectivity (extreme)
The receiver under test shall meet the specifications as defined in subclause 7.1 f).
In the transmitter system that may be used for an ERMES network, a receiver can suffer from radio
interference from a signal being transmitted on a channel adjacent to the required channel. The extreme
temperature conditions as described in subclause 4.6.3 can also be experienced at the same time. In
order that paging messages can still be received under these conditions, the receiver shall meet the
specification as defined in subclause 7.1 f) and measured as defined in subclause 7.2 f).
Reference:
ETS 300 133-5 [3], subclause 5.1 h).
4.6.7 Spurious response immunity
The receiver under test shall meet the specifications as defined in subclause 7.1 g).
In the normal radio environment radio signals can be presented to the receiver to which the receiver is not
intended to respond. However, the receiver may respond to some of these signals. This test is concerned
with the situation when these unwanted interfering signals are at particular frequencies at which the
receiver may respond. These frequencies are calculated by considering the design of the receiver. In
order that paging messages can still be received when these unwanted signals are present and below the
specified limit value, the receiver shall meet the specification as defined in subclause 7.1 g) and measured
as defined in subclause 7.2 g).
Reference:
ETS 300 133-5 [3], subclause 5.1 j).
4.6.8 Intermodulation immunity
The receiver under test shall meet the specifications as defined in subclause 7.1 h).
In the normal radio environment radio signals can be presented to the receiver to which the receiver is not
intended to respond. However, the receiver may respond to some of these unwanted interfering signals.
This test is concerned with the situation when there are two unwanted interfering signals which are
equidistant from the wanted signal and
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