SIST ETS 300 328 E1:2005

SLOVENSKI STANDARD
01-februar-2005
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Radio Equipment and Systems (RES); Wideband transmission systems; Technical
characteristics and test conditions for data transmission equipment operating in the 2,4
GHz ISM band and using spread spectrum modulation techniques
Ta slovenski standard je istoveten z: ETS 300 328 Edition 1
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN ETS 300 328
TELECOMMUNICATION November 1994
STANDARD
Source: ETSI TC-RES Reference: DE/RES-02-09
ICS: 33.060.20
Land mobile radio, data transmission, wideband, spread spectrum, type testing
Key words:
Radio Equipment and Systems (RES)
Wideband data transmission systems
Technical characteristics and test conditions
for data transmission equipment
operating in the 2,4 Ghz ISM band and using
spread spectrum modulation techniques
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - secretariat@etsi.fr
X.400: Internet:
Tel.: +33 92 94 42 00 - Fax: +33 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 1994. All rights reserved.
New presentation - see History box

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ETS 300 328: November 1994
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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ETS 300 328: November 1994
Contents
Foreword.5
Introduction .5
1 Scope .7
2 Normative references .8
3 Definitions and abbreviations.8
3.1 Definitions.8
3.2 Abbreviations.9
4 General . 10
4.1 Manufacturer declarations. 10
4.2 Presentation of equipment for type testing . 10
4.2.1 Choice of model . 10
4.2.2 Presentation . 11
4.2.3 Choice of operating frequencies . 11
4.3 Design. 11
4.3.1 General . 11
4.3.2 Controls. 11
4.4 Marking. 11
4.5 Interpretation of the measurement results . 11
5 Technical characteristics. 11
5.1 Modulation. 11
5.1.1 FHSS modulation. 12
5.1.2 DSSS and other forms of modulation . 12
5.2 Transmitter parameter limits . 12
5.2.1 Frequency range. 12
5.2.2 Effective radiated power. 12
5.2.3 Peak power density. 12
5.2.4 Spurious emissions. 13
5.3 Receiver parameter limits . 14
5.3.1 General . 14
5.3.2 Spurious emissions. 14
6 Test conditions. 14
6.1 Normal and extreme test conditions. 14
6.2 Power sources. 14
6.2.1 Power sources for stand-alone equipment. 14
6.2.2 Power sources for plug-in radio devices. 15
6.3 Normal test conditions . 15
6.3.1 Normal temperature and humidity . 15
6.3.2 Normal power source . 15
6.3.2.1 Mains voltage. 15
6.3.2.2 Regulated lead-acid battery power sources used on
vehicles. 15
6.3.2.3 Other power sources. 15
6.4 Extreme test conditions . 16
6.4.1 Extreme temperatures . 16
6.4.2 Extreme power source voltages . 16
6.4.2.1 Mains voltage. 16

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ETS 300 328: November 1994
6.4.2.2 Regulated lead-acid battery power sources used on
vehicles.16
6.4.2.3 Power sources using other types of batteries.16
6.4.2.4 Other power sources . 16
6.4.3 Procedure for tests at extreme temperatures .17
6.4.3.1 Procedure for equipment designed for continuous
operation.17
6.4.3.2 Procedure for equipment designed for intermittent
operation.17
6.5 Testing of host connected equipment and plug-in radio devices.17
6.5.1 Alternative A: combined equipment .17
6.5.2 Alternative B: use of a test jig and three hosts .17
6.6 Test data sequence.18
7 Methods of measurement.19
7.1 General .19
7.2 Measurements of transmitter parameters.19
7.2.1 Frequency range of equipment using FHSS modulation.19
7.2.2 Frequency range of equipment using other forms of modulation.20
7.2.3 Effective radiated power.20
7.2.4 Peak power density. 22
7.2.5 Spurious emissions.23
7.3 Measurements of receiver parameters.24
7.3.1 General . 24
7.3.2 Spurious emissions.24
8 Measurement uncertainty values.25
Annex A (normative): Test sites and arrangements for radiated measurements .26
A.1 Test sites.26
A.1.1 Open air test sites.26
A.1.2 Anechoic chamber.27
A.1.2.1 General . 27
A.1.2.2 Description.27
A.1.2.3 Influence of parasitic reflections. 27
A.1.2.4 Calibration and mode of use.27
A.2 Test antenna.30
A.3 Substitution antenna.30
A.4 Informative references .30
Annex B (normative): General description of measurement methods.31
B.1 Conducted measurements and use of test fixture .31
B.2 Radiated measurements .31
B.3 Substitution measurement .32
History .33

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ETS 300 328: November 1994
Foreword
This European Telecommunication Standard (ETS) has been prepared by the Radio Equipment and
Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
Annex A provides additional information concerning radiated measurements.
Annex B contains normative specifications for the adjustment of the measurement equipment and of the
equipment to be measured in order to achieve correct results.
Transposition dates
Date of latest announcement of this ETS (doa): 28 February 1995
Date of latest publication of new National Standard 31 August 1995
or endorsement of this ETS (dop/e): 31 August 1995
Date of withdrawal of any conflicting National Standard (dow):
Introduction
Wideband radio data transmission systems are rapidly being introduced into a variety of commercial and
industrial applications and the technology employed by these systems is still developing.
This ETS may be used by accredited test laboratories for the assessment of the performance of the
equipment. The performance of the equipment submitted for type testing should be representative for the
performance of the corresponding production model. In order to avoid any ambiguity in that assessment,
this ETS contains instructions for the presentation of equipment for type testing purposes (clause 4),
testing conditions (clause 6) and methods of measurement (clause 7).
This ETS assumes that:
- the type test measurements performed in an accredited test laboratory in one CEPT country would
be accepted by the Type Approval Authority in another country provided that the national regulatory
requirements are met (see CEPT Recommendation T/R 71-03 [3]);
- if equipment available on the market is required to be checked it would be tested in accordance with
the methods of measurement specified in this ETS.

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ETS 300 328: November 1994
Blank page
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ETS 300 328: November 1994
1 Scope
This European Telecommunication Standard (ETS) covers equipment referred to in CEPT
Recommendation T/R 10-01 [1]. This ETS covers the minimum technical characteristics for radio data
transmission equipment having the following technical parameters:
- wideband radio modulation techniques;
- aggregate bit rates in excess of 250 kbits/s;
- operation in the 2,4 to 2,4835 GHz Industrial, Scientific and Medical (ISM) band;
- effective radiated power of up to - 10 dBW (100 mW);
- power density of up to - 10 dBW (100 mW) per 100 kHz for frequency hopping modulation;
- power density of up to - 20 dBW (10 mW) per 1 MHz for other forms of spread spectrum
modulation.
This ETS only addresses the transceivers, transmitters and receivers of equipment offered for testing.
The equipment offered for testing may be used in fixed, mobile or portable applications, e.g.:
- stand-alone radio equipment with or without their own control provisions;
- combined radio equipment where the radio part is fully integrated within other types of equipment;
- plug-in radio devices intended for use with a variety of host systems, e.g. personal computers.
The equipment may be fitted with integral antennas and/or antenna connectors.
CEPT Recommendation T/R 10-01 [1] defines the total power and power density limits for systems using
spread spectrum modulation together with a minimum aggregate bit rate of 250 kbits/s. The
Recommendation does not address the details of these modulation techniques. Therefore, this ETS does
not cover the design or operation of the equipment being tested but describes a common set of
measurements to be applied to various types of such equipment, including those employing Frequency
Hopping Spread Spectrum (FHSS) modulation and Direct Sequence Spread Spectrum (DSSS) modulation.
CEPT Recommendation T/R 10-01 [1] specifies that spread spectrum modulation be used and it gives
power density values for FHSS and DSSS modulation. This ETS specifies the minimum technical
parameters of FHSS modulation such that it can be clearly differentiated from other types of modulation,
including DSSS modulation.
CEPT Recommendation T/R 01-04 [2] defines limits of spurious emissions for a variety of radio equipment;
these limits are used in this ETS as appropriate.
This ETS describes measurements for operating frequency range(s), effective radiated power and power
density as well as spurious emissions for transmitters and receivers.
The measurement methods have been adapted from ETR 027 [4] where possible.
This ETS specifies test site characteristics, test conditions, equipment calibration and methods of
measurement.
This ETS is a general standard which may be superseded by specific standards covering specific
applications.
Additional standards or specifications may be required for equipment such as that intended for connection
to the Public Switched Telephone Network (PSTN) and/or other Public Data Networks (PDN).

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2 Normative references
This ETS incorporates provisions from other publications. These normative references are cited at the
appropriate places in the text and the publications listed hereafter. For dated references, subsequent
amendments to or revisions of any of these publications apply to this ETS only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to applies.
[1] CEPT Recommendation T/R 10-01: "Wideband Data Transmission in the 2,4
GHz to 2,5 GHz ISM band".
[2] CEPT Recommendation T/R 01-04: "Low Power Devices".
[3] CEPT Recommendation T/R 71-03: "Procedures for Type Testing and Approval
for Radio Equipment intended for non-public systems".
[4] ETR 027: "Radio Equipment and Systems; Methods of measurement for mobile
radio equipment".
[5] ETR 028: "Radio Equipment and Systems; Uncertainties in the measurement of
mobile radio equipment characteristics".
[6] EN 55022: "Limits and methods of measurement of radio interference
characteristics of information technology equipment".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS the following definitions apply:
aggregate bit rate: The bit rate at the air interface (see point D in figure 1) including protocol overhead
where applicable and excluding the effects of signal spreading.
Figure 1: Parameters related to the aggregate bit rate
chip: A unit of modulation used in direct sequence spread spectrum modulation.
chip rate: The number of chips per second.
chip sequence: A sequence of chips with defined length and defined chip polarities.
Direct Sequence Spread Spectrum (DSSS) modulation: A form of modulation where a combination of
data to be transmitted and a known code sequence (chip sequence) is used to directly modulate a carrier,
e.g. by phase shift keying. The transmitted bandwidth is determined by the chip rate and the modulation
scheme.
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fixed station: Equipment intended for use in a fixed location and fitted with one or more antennas. The
equipment may be fitted with either antenna socket(s) or integral antenna(s) or both.
Frequency Hopping Spread Spectrum (FHSS) modulation: A spread spectrum technique in which the
transmitter signal occupies a number of frequencies in time, each for some period of time, referred to as
the dwell time. Transmitter and receiver follow the same frequency hop pattern. The frequency range is
determined by the lowest and highest hop positions and the bandwidth per hop position (see subclause
5.2.1).
frequency range: The range of operating frequencies over which equipment can be adjusted.
hand-portable station: Equipment normally used on a stand-alone basis and to be carried by a person or
held in the hand. The equipment may be fitted with one, or more antennas. The equipment may be fitted
with either antenna socket(s), or integral antenna(s), or both.
host: Host equipment is any equipment which has complete user functionality when not connected to the
radio equipment part and to which the radio equipment part provides additional functionality and to which
connection is necessary for the radio equipment part to offer functionality.
integral antenna: An antenna designed to be connected to the equipment without the use of a standard
50 ohm connector and considered to be part of the equipment. An integral antenna may be fitted internally
or externally to the equipment.
manufacturer: "Manufacturer" is understood to refer to the manufacturer, or applicant of equipment
offered for testing.
mobile station: Equipment normally used in a vehicle or as a transportable station. The equipment may be
fitted with one, or more antennas. The equipment may be fitted with either antenna socket(s), or integral
antenna(s), or both.
operating frequency: The nominal frequency at which equipment is operated; this is also referred to as
the operating centre frequency. Equipment may be adjustable for operation at more than one operating
frequency.
plug-in radio device: Equipment intended to be used within a host, using its housing, control functions and
power supply.
power envelope: The frequency/power contour within which the useful RF power is generated.
spread spectrum modulation: A modulation technique in which the energy of a transmitted signal is
spread throughout a relatively large portion of the frequency spectrum.
stand-alone equipment: Equipment that is normally used on a stand-alone basis and that includes the
radio unit and normally but not necessarily control logic and/or power supply contained within its housing.
3.2 Abbreviations
For the purposes of this ETS the following abbreviations apply:
ac alternating current
dBW dB relative to 1 Watt power
dBm dB relative to 1 milliWatt power
DSSS Direct Sequence Spread Spectrum
eirp equivalent isotropically radiated power
FHSS Frequency Hopping Spread Spectrum
ISM Industrial, Scientific and Medical
ITE Information Technology Equipment
RF Radio Frequency
Rx Receiver
Tx Transmitter
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4 General
4.1 Manufacturer declarations
The manufacturer shall declare the following specific characteristics of the equipment:
a) the aggregate bit rate (see subclause 3.1 for the definition);
b) the type of modulation used: FHSS modulation, DSSS modulation or any other type of spread
spectrum modulation (see subclause 5.1);
c) where applicable, the duty cycle of the transmitter (Tx on/(Tx on + Tx off)) as well as the Tx on and
Tx off times);
d) where FHSS modulation is used: the number of hopping channels, the dwell time per channel and
the maximum time between two instances of use of the same channel; these values shall fall within
the specifications given in subclause 5.1.1;
e) the operating frequency range(s) of the equipment and, where applicable, band(s) of operation (see
subclause 5.2.1);
f) the type of the equipment, for example: stand-alone or plug-in radio device (see subclause 3.1). For
plug-in radio devices the applicable types of host should be declared as well (see also subclause
6.5);
g) the extreme operating conditions that apply to the equipment offered for testing;
h) the gain of the antenna assembly(ies) intended for normal use, i.e. the transfer function between the
conducted RF power and eirp;
i) the nominal ac/dc power voltages of the radio equipment.
Where the equipment to be tested can be equipped with one or more antennas, the manufacturer shall
declare and provide for testing the antenna(s) with the equipment; all of these antennas shall be included in
the radiated measurements described in this ETS. The characteristics of the antenna assembly(ies)
intended for normal use as specified by the manufacturer will be included in the user documentation
supplied with the equipment.
4.2 Presentation of equipment for type testing
4.2.1 Choice of model
The manufacturer shall offer one or more production models or equivalent preliminary models, as
appropriate, for type testing. If type approval is given on the basis of tests on (a) preliminary model(s),
then the corresponding production models shall be identical to the tested models in all respects relevant for
the purposes of this ETS, except, where applicable, for the antenna.
Due to the low levels of RF signal and the wideband modulations used in this type of equipment, radiated
RF power measurements are imprecise. Conducted measurements are much more precise; in combination
with the declared antenna assembly gain(s) adequate assurance of the RF characteristics can be
achieved. Therefore, equipment offered for testing shall provide a 50 ohm connector for conducted RF
power measurements. Where this is not possible, the manufacturer shall provide a documented test fixture
that converts the radiated signal into a conducted signal into a 50 ohm termination. Alternatively, radiated
measurements shall be performed.
Where manufacturers submit equipment with an integral antenna only, two sets of equipment shall be
provided, one set fitted with an RF test connector and one set fitted with the integral antenna.

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4.2.2 Presentation
Stand-alone equipment shall be offered complete with any ancillary equipment needed for testing. The
manufacturer shall declare the frequency range(s), the range of operating conditions and power
requirements as applicable in order to establish the appropriate test conditions.
Plug-in radio devices may be offered for testing together with a suitable test jig and/or host equipment (see
subclause 6.5). The manufacturer shall declare the frequency range(s), the range of operating conditions
and power requirements that are applicable in order to establish the appropriate test conditions.
4.2.3 Choice of operating frequencies
Where equipment can be adjusted to, or operated at, different operating frequencies, a minimum of three
operating frequencies shall be chosen such that the lower and higher limits of the operating range(s), as
well as the middle of the operating range(s), of the equipment are covered, (see subclause 5.2.1).
4.3 Design
4.3.1 General
The equipment submitted by the manufacturer, shall be designed, constructed and manufactured in
accordance with sound engineering practice, and with the aim of minimizing harmful interference to other
equipment and services.
4.3.2 Controls
Those controls (of the radio part) which, if maladjusted, might increase the interfering potential of the
equipment shall not be easily accessible to the user.
4.4 Marking
The marking shall be in accordance with the requirements of CEPT Recommendation TR 10-01 [1].
4.5 Interpretation of the measurement results
The interpretation of the test results recorded in a test report for the measurements described in this ETS
shall be as follows:
a) the measured value related to the corresponding limit shall be used to decide whether an equipment
meets the requirements of the ETS;
b) the actual measurement uncertainty of the test laboratory carrying out the measurements, for each
particular measurement, in accordance with ETR 028 [5], shall be recorded in the test report.
The recorded value of the measurement uncertainty shall be, for each measurement, equal to or lower
than the figures in clause 8 (measurement uncertainty).
5 Technical characteristics
5.1 Modulation
The manufacturer shall declare the modulation characteristics of the equipment to be tested. For the
purpose of deciding which level of power density applies to equipment offered for testing, this ETS defines
two categories of equipment:
- equipment conforming to the stated characteristics of FHSS modulation (see subclause 5.1.1); and

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- equipment not conforming to these characteristics.
The latter category includes equipment using DSSS modulation (see subclause 5.1.2).
5.1.1 FHSS modulation
FHSS modulation shall make use of at least 20 well defined, non-overlapping channels or hopping positions
separated by the channel bandwidth as measured at 20 dB below peak power. The dwell time per channel
shall not exceed 0,4 seconds. While the equipment is operating (transmitting and/or receiving) each
channel of the hopping sequence shall be occupied at least once during a period not exceeding four times
the product of the dwell time per hop and the number of channels. Systems that meet these constraints
shall be tested according to the requirements for FHSS modulation.
5.1.2 DSSS and other forms of modulation
For the purposes of this ETS, other forms of spread spectrum modulation which do not satisfy the
constraints of the specification given in subclause 5.1.1, shall be considered equivalent to DSSS
modulation. Systems using these other forms of modulation, shall be tested according to the requirements
for DSSS modulation.
5.2 Transmitter parameter limits
5.2.1 Frequency range
The frequency range of the equipment is determined by the lowest and highest frequencies occupied by
the power envelope.
f is the highest frequency of the power envelope; it is the frequency furthest above the frequency of
H
maximum power where the output power drops below the level of - 80 dBm/Hz spectral power density (-
30 dBm if measured in a 100 kHz bandwidth).
f is the lowest frequency of the power envelope; it is the frequency furthest below the frequency of
L
maximum power where the output power drops below the level of - 80 dBm/Hz spectral power density (-
30 dBm if measured in a 100 kHz bandwidth).
The width of the power envelope is f - f for a given operating frequency.
H L
In equipment that allows adjustment or selection of different operating frequencies, the power envelope
takes up different positions in the allocated band. The frequency range is determined by the lowest value
of f and the highest value of f resulting from the adjustment of the equipment to the lowest and highest
L H
operating frequencies.
For all equipment the frequency range shall lie within the band 2,4 GHz to 2,4835 GHz (i.e. f > 2,4 GHz
L
and f < 2,4835 GHz).
H
See clause 6 for the test conditions; see subclauses 7.2.1 and 7.2.2 for the measurement methods.
5.2.2 Effective radiated power
The effective radiated power is defined as the total power of the transmitter and is calculated according to
the procedure given in subclause 7.2.3. The effective radiated power shall be equal to or less than
- 10 dBW (100 mW) eirp, see clause 6 for the test conditions; see subclause 7.2.3 for the measurement
method.
5.2.3 Peak power density
The peak power density is defined as the highest instantaneous level of power in Watts per Hertz
generated by the transmitter within the power envelope. For equipment using FHSS modulation, the power
density shall be limited to - 10 dBW (100 mW) per 100 kHz eirp. For equipment using other types of

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modulation, the peak power shall be limited to - 20 dBW (10 mW per MHz) eirp, see clause 6 for the test
conditions; see subclause 7.2.4 for the measurement and calculation methods.
5.2.4 Spurious emissions
Spurious emissions are emissions outside the declared frequency range(s) of the equipment offered for
testing.
The level of spurious emissions shall be measured as either:
a) their power in a specified load (conducted spurious emissions); and
b) their effective radiated power when radiated by the cabinet or structure of the equipment (cabinet
radiation); or
c) their effective radiated power when radiated by the cabinet and by the integral antenna, in case of
equipment fitted with an antenna and no external connector intended for normal use.
The spurious emissions of the transmitter shall not exceed the values in table 1 in the indicated bands.
Table 1: Transmitter spurious emission levels
Operating Standby
Frequency range in 100 kHz in 1 MHz in 100 kHz in 1 MHz
9 kHz - 1 GHz - 36 dBm n.a. - 57 dBm n.a.
(conducted, case a) (250 nW) (2 nW)
30 MHz - 1 GHz
(radiated, case b and
c)
47,0 - 74,0 MHz - 54 dBm n.a. - 57 dBm n.a.
87,5 - 118,0 HHz (4 nW) (2 nW)
174,0 - 230,0 MHz
470,0 - 862,0 MHz
1 GHz - 12,75 GHz n.a. - 30 dBm n.a. - 47 dBm
conducted and (1 uW) (20 nW)
radiated
890 - 960 MHz - 56 dBm n.a. - 57 dBm n.a.
1,8 - 1,9 GHz (3 nW) (2 nW)
5,15 - 5,3 GHz
See note
NOTE: In these bands, the measurement of any spurious product found shall be repeated with a
measurement bandwidth of 30 kHz. If the level observed remains within 2 dB of the previous
measurement, the spurious product shall be considered a narrow band signal. For narrow band
signals the limit value of - 36 dBm (250 nW) shall apply at frequencies below 1 GHz and the limit
value of - 30 dBm (1 uW) shall apply at frequencies above 1 GHz.
The bandwidths given in table 1 are the nominal Gaussian bandwidths (e.g. 100 kHz at - 3 dB or 120 kHz
at - 6 dB) of the measuring equipment.
See clause 6 for the test conditions; see subclause 7.2.5 for the measurement methods.

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5.3 Receiver parameter limits
5.3.1 General
This ETS does not impose limits on the receiver of the equipment to be measured other than spurious
emission limits (see also subclause 5.2.4).
5.3.2 Spurious emissions
Spurious emissions are emissions outside the declared frequency range(s) of the equipment offered for
testing.
The level of spurious emissions shall be measured as either:
a) their power in a specified load (conducted spurious emissions); and
b) their effective radiated power when radiated by the cabinet or structure of the equipment (cabinet
radiation); or
c) their effective radiated power when radiated by the cabinet and by the integral antenna, in case of
equipment fitted with an antenna and no external connector intended for normal use.
The spurious emissions of the receiver shall be limited to the values in table 2.
Table 2: Spurious emission limits for receivers
Frequency range in 100 kHz in 1 MHz
9 kHz to 1 GHz (conducted, case - 57 dBm (2 nW) n.a.
a))
30 MHz to 1 GHz (radiated, case
b) and c))
1 GHz to 12,75 GHz (conducted n.a. - 47 dBm (20 nW)
and radiated)
The bandwidths given in table 2 are the nominal Gaussian bandwidths (e.g. 100 kHz at - 3 dB or 120 kHz
at - 6 dB) of the measuring equipment.
See clause 6 for the test conditions; see subclause 7.3 for the measurement methods.
6 Test conditions
6.1 Normal and extreme test conditions
Type tests shall be made under normal test conditions and where stated in the methods of measurement
(see also clause 7), under extreme conditions, (see also subclause 6.4.1).
Exceptions to the measurement procedures given in this clause shall be recorded in the test report.
6.2 Power sources
6.2.1 Power sources for stand-alone equipment
During type tests, the power source of the equipment shall be replaced by a test power source capable of
producing normal and extreme test voltages as specified in subclauses 6.3.2 and 6.4.2. The internal

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impedance of the test power source shall be low enough for its effect on the test results to be negligible.
For the purpose of tests, the voltage of the power source shall be measured at the input terminals of the
equipment.
For battery operated equipment the battery shall be removed and the test power source shall be applied
as close to the battery terminals as practicable.
During tests the power source voltages shall be maintained within a tolerance of <±1% relative to the
voltage at the beginning of each test. The value of this tolerance is critical to power measurements; using a
smaller tolerance will provide better measurement uncertainty values.
6.2.2 Power sources for plug-in radio devices
The power source for testing plug-in radio devices shall be provided by a test jig or host equipment. Where
the host system and/or the plug-in radio device is battery powered, the battery shall be removed and the
test power source shall be applied as close to the battery terminals as practicable.
6.3 Normal test conditions
6.3.1 Normal temperature and humidity
The normal temperature and humidity conditions for tests shall be any convenient combination of
temperature and humidity within the following ranges:
- temperature: + 15°C to + 35°C;
- relative humidity: 20 % to 75 %.
When it is impracticable to carry out the tests under these conditions, a note to this effect, stating the
ambient temperature and relative humidity during the tests, shall be recorded in the test report.
The actual values during the tests shall be recorded in the test report.
6.3.2 Normal power source
6.3.2.1 Mains voltage
The normal test voltage for equipment to be connected to the mains shall be the nominal mains voltage.
For the purpose of this ETS, the nominal voltage shall be the declared voltage or any of the declared
voltages for which the equipment was designed.
The frequency of the test power source corresponding to the ac mains shall be between 49 and 51 Hz.
6.3.2.2 Regulated lead-acid battery power sources used on vehicles
When radio equipment is intended for operation from the usual types of regulated lead-acid battery power
source used on vehicles, then the normal test voltage shall be 1,1 times the nominal voltage of the battery
(6V, 12V, etc.).
6.3.2.3 Other power sources
For operation from other power sources or types of battery (primary or secondary), the nominal test
voltage shall be as declared by the equipment manufacturer. This shall be recorded in the test report.

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6.4 Extreme test conditions
6.4.1 Extreme temperatures
For tests at extreme temperatures, measurements shall be made in accordance with the procedures
specified in subclause 6.4.3, at the upper and lower temperatures of the range as follows:
- temperature: - 20°C to + 55°C.
Where the manufacturer's declared operating range does not include the range of - 20°C to + 55°C, the
equipment shall be tested over the following temperature ranges:
a) 0°C to + 35°C for equipment intended for indoor use only, or intended for use in areas where
the temperature is controlled within this range;
b) over the extremes of the operating temperature range(s) of the declared host equipment(s) in
case of plug-in radio devices.
The frequency range as in subclause 5.2.1 and the eirp limit in subclause 5.2.2 shall not be exceeded.
The temperature range used in the type testing shall be recorded in the test report and shall be stated in
the user manual.
6.4.2 Extreme power source voltages
6.4.2.1 Mains voltage
The extreme test voltage for equipment to be connected to an ac mains source shall be the nominal mains
voltage ± 10 %.
Tests at extreme power source voltages are not required when the equipment under test is designed for
operation as part of and powered by another system or piece of equipment. Where this is the case, the
limit values of the host system or host equipment shall apply. The appropriate limit values shall be declared
by the manufacturer and recorded in the test report.
6.4.2.2 Regulated lead-acid battery power sources used on vehicles
When radio equipment is intended for operation from the usual types of regulated lead-acid battery power
source used on vehicles, then extreme test voltage shall be 1,3 and 0,9 times the nominal voltage of the
battery (6V, 12V, etc.).
6.4.2.3 Power sources using other types of batteries
The lower extreme test voltages for equipment with power sources using the following types of battery,
shall be:
- for the Leclanché or lithium type battery: 0,85 times the nominal voltage of the battery;
- for the mercury or nickel-cadmium type of battery: 0,9 times the nominal voltage of the battery.
In both cases, the upper extreme test voltage shall be 1,15 times the nominal voltage of the battery.
6.4.2.4 Other power sources
For equipment using other power sources, or capable of being operated from a variety of power sources
(primary or secondary), the extreme test voltages shall be those declared by the manufacturer; these shall
be recorded in the test report.

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ETS 300 328: November 1994
6.4.3 Procedure for tests at extreme temperatures
Before measurements are made the equipment shall have reached thermal balance in the test chamber.
The equipment shall be switched off during the temperature stabilizing period. In the case of equipment
containing temperature stabilizing circuits designed to operate continuously, these circuits shall be switched
on for 15 minutes after thermal balance has been reached; at that time the equipment shall meet the
specified requirements. For this type of equipment the manufacturer shall provide for the power source
circuit feeding the crystal oven to be independent of the power source of the rest of the equipment.
If thermal balance is not checked by measurements, a temperature stabilizing period of at least one hour,
or such period as may be decided by the testing laboratory, shall be allowed. The sequence of
measurements shall be chosen and the humidity content in the test chamber shall be controlled so that
excessive condensation does not occur.
6.4.3.1 Procedure for equipment designed for continuous operation
Before tests at the upper extreme temperature, the equipment shall be placed in the test chamber and left
until thermal balance is attained. The equipment shall than be switched on in the transmit conditions for a
period of half an hour after which the equipment shall meet the specified requirements.
For tests at the lower extreme temperature, the equipment shall be left in the test chamber until thermal
balance is attained, then switched to the standby or receive condition for a period of one minute after
which the equipment shall meet the specified requirements.
6.4.3.2 Procedure for equipment designed for intermittent operation
Before tests at the upper extreme temperature, the equipment shall be placed in the test chamber and left
until thermal balance is attained. The equipment shall than be switched on for one minute in the transmit
condition, followed by four minutes in the receive condition, after which the equipment shall meet the
specified requirements.
For tests at the lower extreme temperature, the equipment shall be left in the test chamber until thermal
balance is attained, then switched to the standby or receive condition for a period of one minute after
which the equipment shall meet the specified requirements.
6.5 Testing of host connected equipment and plug-in radio devices
For equipment for which connection to or integration with host equipment is required to offer functionality,
two alternative approaches are permitted. The manufacturer shall declare which alternative shall be used.
6.5.1 Alternative A: combined equipment
A combination of a radio equipment part and a specific type of host equipment may be used for testing
according to this ETS.
Where more than one such a combination is intended, each combination shall be tested separately.
Type testing shall not be repeated for combinations of radio parts and host equipment where the latter are
substantially similar in terms of mechanical and electrical characteristics as those offered for type testing.
6.5.2 Alternative B: use of a test jig and three hosts
Where the radio equipment part is intended for use with a variety of host systems, the manufacturer shall
supply a suitable test jig. The test jig shall be designed such that alteration of the radio equipment's
intrinsic emissions is minimized. Where connection between the radio equipment part and the host is by
means of cables, optical fibres or similar means between contr
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