SIST EN 302 248 V1.1.2:2008

Harmonized European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Navigation radar for use on non-SOLAS vessels;
Harmonized EN covering the essential requirements
of article 3.2 of the R&TTE Directive

2 ETSI EN 302 248 V1.1.2 (2008-06)

Reference
DEN/ERM-TG26-059
Keywords
maritime, navigation, radar, radio
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ETSI
3 ETSI EN 302 248 V1.1.2 (2008-06)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.6
2.1 Normative references.6
2.2 Informative references.7
3 Symbols and abbreviations.7
3.1 Symbols.7
3.2 Abbreviations.7
4 Technical requirements .8
4.1 Environmental profile.8
4.2 Conformance requirements.8
4.2.1 Radiated emissions.8
4.2.1.1 Definition.8
4.2.1.2 Limits.8
4.2.1.3 Conformance.8
4.2.2 Operating frequency.8
4.2.2.1 Definition.8
4.2.2.2 Limits.8
4.2.2.3 Conformance.9
4.2.3 Transmitter pulse power .9
4.2.3.1 Definition.9
4.2.3.2 Limits.9
4.2.3.3 Conformance.9
4.2.4 Out of band emissions.9
4.2.4.1 Definition.9
4.2.4.2 Limits.10
4.2.4.3 Conformance.10
4.2.5 Radiated spurious emissions.10
4.2.5.1 Definition.10
4.2.5.2 Limits.10
4.2.5.3 Conformance.10
5 Testing for compliance with technical requirements.11
5.1 Test conditions, power supply and ambient temperatures.11
5.1.1 Standard operating mode of the radar equipment .11
5.1.2 Normal test conditions .11
5.1.2.1 Normal temperature and humidity .11
5.1.2.2 Normal test power supply .11
5.1.2.2.1 AC test power supply .11
5.1.2.2.2 DC test power supply .12
5.1.3 Extreme test conditions.12
5.1.3.1 Extreme temperatures.12
5.1.3.1.1 Indoor unit .12
5.1.3.1.2 Outdoor unit .12
5.1.3.2 Extreme power supply voltage test conditions.12
5.2 Interpretation of the measurement results .12
5.3 Essential radio test suites.13
5.3.1 Radiated emissions.13
5.3.2 Operating frequency.13
5.3.3 Transmitter pulse power .14
5.3.4 Out of band emissions.14
5.3.5 Radiated spurious emissions.14
5.4 Other test specifications.15
ETSI
4 ETSI EN 302 248 V1.1.2 (2008-06)
Annex A (normative): HS Requirements and conformance Test specifications Table (HS-
RTT).16
Annex B (normative): Radiated measurement.18
B.1 Test sites and general arrangements for measurements involving the use of radiated fields .18
B.1.1 Anechoic chamber.18
B.1.2 Anechoic chamber with a ground plane .19
B.1.3 OATS.20
B.1.4 Test antenna.21
B.1.5 Substitution antenna.21
B.1.6 Measuring antenna.22
B.2 Guidance on the use of radiation test sites .22
B.2.1 Verification of the test site .22
B.2.2 Preparation of the EUT.22
B.2.3 Power supplies to the EUT.22
B.2.4 Volume control setting for analogue speech tests .22
B.2.5 Range length.23
B.2.6 Site preparation.23
Annex C (normative): Transmission power and unwanted emissions of radar systems;
measuring methods.25
C.1 Indirect connection via the rotating joint.25
C.2 Maximum permitted out of band emissions power levels.26
C.3 Maximum permitted spurious emissions power levels .27
Annex D (informative): The EN title in the official languages .28
History .30

ETSI
5 ETSI EN 302 248 V1.1.2 (2008-06)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI 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 not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document is a harmonized EN covering essential requirements under article 3.2 of the R&TTE directive for
navigation radar for use on non-SOLAS vessels.
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC [i.2] (as amended) laying down a procedure for the provision of information in the
field of technical standards and regulations.
The present document is intended to become a Harmonized Standard, the reference of which will be published in the
Official Journal of the European Communities referencing the Directive 1999/5/EC [i.1] of the European Parliament
and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual
recognition of their conformity ("the R&TTE Directive").
Technical specifications relevant to Directive 1999/5/EC [i.1] are given in annex A.

National transposition dates
Date of adoption of this EN: 13 June 2008
Date of latest announcement of this EN (doa): 30 September 2008
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 2009
Date of withdrawal of any conflicting National Standard (dow): 31 March 2010

ETSI
6 ETSI EN 302 248 V1.1.2 (2008-06)
1 Scope
The present document applies to non-SOLAS radar equipment.
The present document is intended to cover the provisions of Directive 1999/5/EC [i.1] (R&TTE Directive) Article 3.2,
which states that "… radio equipment shall be so constructed that it effectively uses the spectrum allocated to
terrestrial/space radio communications and orbital resources so as to avoid harmful interference".
In addition to the present document, other ENs that specify technical requirements in respect of essential requirements
under other parts of Article 3 of the R&TTE Directive [i.1] may apply to equipment within the scope of the present.
This radar equipment operates in the frequency range 2 900 MHz to 3 100 MHz or 9 300 MHz to 9 500 MHz allocated
to the radio navigation service as defined in article 5 of the Radio Regulations [6].
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only
the edition cited applies. For non-specific references, the latest edition of the referenced document (including any
amendments) applies.
[1] CENELEC EN 60945 (Edition 4 - 2002): "Maritime navigation and radiocommunication
equipment and systems - General requirements - Methods of testing and required test results".
[2] ITU-R Recommendation M.1177-3 (2003): "Techniques for measurement of unwanted emissions
of radar systems".
[3] ANSI C63.5 (1988): "American National Standard for Calibration of Antennas Used for Radiated
Emission Measurements in Electromagnetic Interference (EMI) Control".
[4] ETSI TR 100 028 (V1.3.1 - all parts): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
ETSI
7 ETSI EN 302 248 V1.1.2 (2008-06)
[5] ETSI TR 102 273 (2001): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
[6] ITU Radio Regulations.
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] Directive 1999/5/EC of The European Parliament and of the Council of 9 March 1999 on radio
equipment and telecommunications terminal equipment and the mutual recognition of their
conformity (R&TTE Directive).
[i.2] Directive 98/34/EC of the European Parliament and of the Council laying down a procedure for
the provision of information in the field of technical standards and regulations and of rules on
information society services.
[i.3] ITU-R Recommendation SM.1541-1: "Unwanted emissions in the out-of-band domain".
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the following symbols apply:
B -40 dB bandwidth
-40
P Transmission mean power
m
P Transmission pulse power
t
t Time
t Transmission pulse duration
p
t Pulse rise time
r
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
EBL Electronic Bearing Line
EUT Equipment Under Test
FTC Fast Time Constant
HS Harmonized Standard
LNA Low Noise Amplifier
OATS Open Area Test Site
OOB Out Of Band
PEP Peak Envelope Power
PRT Pulse Repetition Time
RF Radio Frequency
RJ Rotary Joint
SOLAS Safety Of Life At Sea
STC Sensitivity Time Control
VRM Variable Range Marker
VSWR Voltage Standing Wave Radio
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8 ETSI EN 302 248 V1.1.2 (2008-06)
4 Technical requirements
4.1 Environmental profile
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
declared operational environmental profile which, as a minimum, shall be that specified in the test conditions contained
in the present document.
As technical performance varies subject to environmental conditions, tests shall be carried out under a sufficient variety
of environmental conditions as specified in the present document to give confidence of compliance for the affected
technical requirements (which shall also be within the boundary limits of the declared operational environmental
profile).
4.2 Conformance requirements
4.2.1 Radiated emissions
4.2.1.1 Definition
Radiated electromagnetic emissions are to be understood as any signals radiated by the completely assembled and
operated radar equipment, other than the operating frequency, with its spectra, which can potentially disturb other
equipment on the ship, such as radio receivers or rate of turn indicators.
4.2.1.2 Limits
In the frequency range 150 kHz to 2 GHz, the measured radio frequency field strength at a distance of 3 m caused by
the EUT shall not exceed the limits shown in table 1.
Table 1: Radiated electromagnetic emission
Frequency range Measuring Bandwidth Limits
150 kHz to 300 kHz 9 kHz
10 mV/m to 316 μV/m (80 dBμV/m to 52 dBμV/m)
300 kHz to 30 MHz 9 kHz 316 μV/m to 50 μV/m (52 dBμV/m to 34 dBμV/m)
30 MHz to 156 MHz 120 kHz
500 μV/m (54 dBμV/m)
and 165 MHz to 2 GHz
156 MHz to 165 MHz 9 kHz 16 μV/m (24 dBμV/m) quasi peak or
32 μV /m (30 dBμV/m) peak
4.2.1.3 Conformance
Conformance tests as defined in clause 5.3.1 shall be carried out.
4.2.2 Operating frequency
4.2.2.1 Definition
The transmitter produces short microwave pulses, which causes a broad frequency spectrum, depending on the pulse
duration and the pulse repetition frequency. The operating frequency is to be understood as the frequency of the
microwave during the transmitting pulse and is represented by the spectral line of highest amplitude.
4.2.2.2 Limits
In all switchable distance ranges and pulse durations the operation frequency of the radar equipment shall have values
in the range of 2 900 MHz to 3 100 MHz or 9 300 MHz to 9 500 MHz.
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9 ETSI EN 302 248 V1.1.2 (2008-06)
4.2.2.3 Conformance
Conformance tests as defined in clause 5.3.2 shall be carried out.
4.2.3 Transmitter pulse power
4.2.3.1 Definition
Transmitter pulse power P is to be understood as the mean value of the microwave power during the transmission pulse
t
at the antenna side of the Rotary Joint (RJ). For the arithmetic mean value of the transmitting power, integrated over the
PRT, the abbreviation P will be used.
m
4.2.3.2 Limits
The transmitter pulse power P shall be as specified by the manufacturer +0 dB to -3 dB.
t
4.2.3.3 Conformance
Conformance tests as defined in clause 5.3.3 shall be carried out.
4.2.4 Out of band emissions
4.2.4.1 Definition
ITU-R Recommendation SM.1541-1 [i.3] gives guidance to calculate the -40 dB bandwidth and to specify the OOB
mask for primary radars in per cent of the -40 dB bandwidth (see figure 1).
The -40 dB bandwidth (B ) for primary radars shall be determined with the following established formula by using the
-40
lesser of:
K 64
B = or
−40
t
t ×t
r
where the coefficient K is 6,2 for radars with output power greater than 100 kW and 7,6 for lower-power radars and
radars operating in the radio navigation service in the 2 900 MHz to 3 100 MHz and 9 300 MHz to 9 500 MHz band.
The latter expression applies if the rise time t is less than about 0,0094t when K is 6,2 or about 0,014t when K is 7,6.
r
Attenuation (dBpp)
0 100 200 300 400 500 600
Frequency separation (per cent of 40 dB bandwidth)

Figure 1: OOB mask for primary radars
ETSI
10 ETSI EN 302 248 V1.1.2 (2008-06)
For ideal rectangular pulses, the spectrum falls off at 20 dB per decade leading to a B of 6,4/t and a 40 dB bandwidth
-40
ten times as large, i.e. 64/t. To discourage the use of pulses with abrupt rise and fall times, no margin is allowed. The
spectra of trapezoidal pulses fall off firstly at 20 dB per decade and then ultimately at 40 dB per decade. If the radio or
rise time to pulse duration exceeds 0,008 the 40 dB points will fall on the 40 dB per decade slope, in which case the
bandwidth B would be:
-40
5,7
B =
−40
t×t
r
e.g. a radar with a fixed 10 ns rise time would result in bandwidth values as shown in table 2.
Table 2: Examples of -40 dB bandwidth of a primary radar
at different pulse durations (rise time = 10 ns)
Pulse duration - 40 dB bandwidth B
-40
Short pulse (t = 50 ns) B = 255 MHz
-40
Medium Pulse (t = 200 ns) B = 127 MHz
-40
B = 81 MHz
Long Pulse (t = 500 ns)
-40
4.2.4.2 Limits
The maximum radiated Out Of Band-emission power level shall not exceed the limits given in figure C.3.
4.2.4.3 Conformance
Conformance tests as defined in clause 5.3.4 shall be carried out.
4.2.5 Radiated spurious emissions
4.2.5.1 Definition
Spurious emissions are defined as the entity of all emissions in the frequency range of 70 % of the cut-off frequency of
the waveguide to 26 GHz, but outside the OOB-boundaries.
They include:
• harmonic emissions (whole multiples of the operating frequency);
• parasitic emissions (independent, accidentally);
• intermodulation (between oscillator- and operation frequency or between oscillator and harmonics);
• emissions caused by frequency conversions.
4.2.5.2 Limits
All radiated spurious emission levels shall be 43+10 log PEP or 60 dB below the PEP level of the radiated operating
frequency (see figure C.3) whichever is less stringent.
4.2.5.3 Conformance
Conformance tests as defined in clause 5.3.5 shall be carried out.
ETSI
11 ETSI EN 302 248 V1.1.2 (2008-06)
5 Testing for compliance with technical requirements
5.1 Test conditions, power supply and ambient temperatures
5.1.1 Standard operating mode of the radar equipment
Unless otherwise stated the radar equipment shall be set to the standard operating mode which is understood to be as
follows:
Operation state: on (antenna turns);
Antenna height: 7 m;
RANGE: shortest;
TUNE setting: optimal;
GAIN setting: optimal;
STC setting: zero;
FTC setting: off;
Range rings: visible;
VRM: visible;
EBL: visible;
Brilliance of all attributes: optimal (well readable).
5.1.2 Normal test conditions
5.1.2.1 Normal temperature and humidity
The temperature and humidity conditions for tests shall be a combination of temperature and humidity within the
following ranges:
o o
a) temperature: +15 C to +35 C; or within the manufacturers stated operating range and stated in the
report;
b) relative humidity: 20 % to 75 %.
When the relative humidity is lower than 20 %, it shall be stated in the test report.
5.1.2.2 Normal test power supply
5.1.2.2.1 AC test power supply
The test voltage for equipment to be connected to an AC supply shall be the nominal mains voltage declared by the
manufacturer -10 % to +10 %. For the purpose of the present document, the nominal voltage shall be the declared
voltage or any of the declared voltages for which the equipment is indicated as having been designed. The frequency of
the test voltage shall be 50 Hz ±1 Hz.
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12 ETSI EN 302 248 V1.1.2 (2008-06)
5.1.2.2.2 DC test power supply
Where the equipment is designed to operate from a DC source, the normal test voltage shall be the nominal voltage as
declared by the manufacturer -10 % to +20 %.
The internal impedance of the test power source shall be low enough for its effect on the test results to be negligible.
For the purpose of testing the power source voltage shall be measured at the input terminals of the equipment.
During testing, the power source voltages shall be maintained within a tolerance of ±3 % relative to the voltage level at
the beginning of each test.
5.1.3 Extreme test conditions
5.1.3.1 Extreme temperatures
5.1.3.1.1 Indoor unit
The temperature and humidity conditions for extreme tests shall be a combination of nominal temperature and humidity
within the following ranges:
o o
a) temperature: 0 C to +40 C;
b) relative humidity: 20 % to 75 %.
When the relative humidity is lower than 20 %, it shall be stated in the test report.
5.1.3.1.2 Outdoor unit
The temperature and humidity conditions for extreme tests shall be a combination of nominal temperature and humidity
within the following ranges:
o o
a) temperature: -20 C to +55 C;
b) relative humidity: 20 % to 93 %.
When the relative humidity is lower than 20 %, it shall be stated in the test report.
5.1.3.2 Extreme power supply voltage test conditions
The extreme power supply test voltages applied to the equipment shall be according to table 3.
Table 3: Extreme power supply voltage and frequency tolerances
Power supply Voltage variation % Frequency variation %
AC
±10 ±5
DC +20 Not applicable
-10
5.2 Interpretation of the measurement results
The interpretation of the results recorded in a test report for the measurements described in the present document shall
be as follows:
• the measured value related to the corresponding limit shall be used to decide whether an equipment meets the
requirements of the present document;
• the value of the measurement uncertainty for the measurement of each parameter shall be included in the test
report;
ETSI
13 ETSI EN 302 248 V1.1.2 (2008-06)
• the recorded value of the measurement uncertainty shall be, for each measurement, equal to or lower than the
figures in table 2.
For the test methods, according to the present document, the measurement uncertainty figures shall be calculated in
accordance with TR 100 028 [4] and shall correspond to an expansion factor (coverage factor) k = 1,96 or k = 2 (which
provide confidence levels of respectively 95 % and 95,45 % in the case where the distributions characterizing the actual
measurement uncertainties are normal (Gaussian)).
Table 4 is based on such expansion factors.
Table 4: Absolute measurement uncertainties: maximum values
Parameter Maximum uncertainty
-
RF frequency 7
1 x 10
RF pulse power 1,5 dB
Radiated emission of transmitter 6 dB

5.3 Essential radio test suites
5.3.1 Radiated emissions
On a test site selected from annex B, the EUT shall be placed on a non-conductive support with a height of 1,5 m.
When the EUT consists of more than one unit the interconnecting cables shall have the maximum length and type as
indicated by the manufacturer or 20 m whichever is shorter. Available input and output ports of the ancillary equipment
under test shall be connected to the maximum length of cable as indicated by the manufacturer or 20 m whichever is
shorter and terminated to simulate the impedance of the relevant ports of the radio equipment. These cables shall be
bundled at the approximate centre of the cable with the bundles of 30 cm to 40 cm in length running in the horizontal plane
from the port to which it is connected. If it is impractical to do so because of cable bulk or stiffness, the disposition of the
excess cable shall be precisely noted in the test report.
The test antenna shall be placed at a radial distance of 3 m from the edge of the minimum dimension circle, the smallest
dimension circle in the horizontal plane that encloses all elements of the indoor- and the outdoor -units, at a height of
1,5 m above the ground plane.
The test method shall be according to EN 60945 [1].
The radiated emission of the EUT shall be measured in the frequency range 150 kHz to 2 GHz.
The results obtained shall be compared to the limits in clause 4.2.1.2 in order to prove compliance with the requirement.
5.3.2 Operating frequency
The antenna shall be replaced by a suitable adapter to adapt the rotary joint to a waveguide with a plane flange. This
adapter shall be provided by the radar manufacturer. On that flange a high-power directional coupler will be mounted
with its main port terminated by a matching high-power dummy load. The coupled port shall have an adequate
attenuation within the whole frequency band 2 800 MHz to 3 200 MHz or 8 900 MHz to 9 900 MHz to protect the
measurement equipment.
To measure and display the transmitted signal a suitable spectrum analyser will be used. The spectral line of highest
amplitude will be considered to be the operating frequency.
Alternatively the operating frequency can be measured as well with a direct reading frequency meter.
The results obtained shall be compared to the limits in clause 4.2.2.2 in order to prove compliance with the requirement.
ETSI
14 ETSI EN 302 248 V1.1.2 (2008-06)
5.3.3 Transmitter pulse power
The antenna shall be replaced by a suitable adapter to adapt the rotary joint to a waveguide with a plane flange. This
adapter shall be provided by the radar manufacturer. On that flange a high-power directional coupler will be mounted
with its main port terminated by a matching high-power dummy load. The coupled port shall have a known attenuation
of about 40 dB within the whole frequency band 2 800 MHz to 3 200 MHz or 8 900 MHz to 9 900 MHz.
To determine the pulse power, the use of both, a mean power meter or a suitable pulse power meter with direct reading
of the transmitter pulse power is permitted. In case of measurement with a mean power meter the transmission pulse
duration t and the pulse repetition time PRT have to be determined in a preceding step i.e. by use of a detector and an
p
oscilloscope. Then the transmitter pulse power P is calculated as follows:
t
P = P × PRT/t
t m p
The results obtained shall be compared to the limits in clause 4.2.3.2 in order to prove compliance with the requirement.
5.3.4 Out of band emissions
To perform the measurement, the radar and the measuring equipment shall be installed as described in the
ITU-R Recommendation M.1177-3 [2]. Then the radar equipment shall be set to the shortest range (shortest pulse
duration).
Measures described in the ITU-R Recommendation M.1177-3 [2] shall be taken to ensure that interferences caused by
multiple reflections do not occur.
The radiated out of band power emission shall be measured in the frequency bands given in table 5 with the antenna
rotating using the selected method from those described in the ITU-R Recommendation M.1177-3 [2].
The results obtained shall be compared to the limits in clause 4.2.4.2 in order to prove compliance with the requirement.
Table 5: Out of band emissions measurement bands
Operating frequency Lower measurement band Upper measurement band
9,3 GHz to 9,5 GHz 8,0 GHz to 9,3 GHz 9,5 GHz to 10,8 GHz
2,9 GHz to 3,1 GHz 2,7 GHz to 2,9 GHz 3,1 GHz to 3,3 GHz

5.3.5 Radiated spurious emissions
To perform the measurement, the radar and the measuring equipment shall be installed as described in the ITU-R
Recommendation M.1177-3 [2]. Then the radar equipment shall be set to the shortest range (shortest pulse duration).
Measures described in the ITU-R Recommendation M.1177-3 [2] shall be taken to ensure that interferences caused by
multiple reflections do not occur.
The radiated spurious power emission shall be measured in several overlapping frequency sweep steps in the frequency
bands given in table 6.
If required to reach a dynamic amplitude measuring range of 70 dB minimum, a Low Noise Amplifier (LNA), and a
notch filter for the operating frequency should be used.
The results obtained shall be compared to the limits in clause 4.2.5.2 in order to prove compliance with the requirement.
Table 6: Spurious emissions measurement bands
Operating frequency Lower measurement band Upper measurement band
9,3 GHz to 9,5 GHz 4,5 GHz to 8,0 GHz 10,8 GHz to 26 GHz
2,9 GHz to 3,1 GHz 2,0 GHz to 2,7 GHz 3,3 GHz to 26 GHz

ETSI
15 ETSI EN 302 248 V1.1.2 (2008-06)
5.4 Other test specifications
There are no tests under this clause.
ETSI
16 ETSI EN 302 248 V1.1.2 (2008-06)
Annex A (normative):
HS Requirements and conformance Test specifications
Table (HS-RTT)
The HS Requirements and conformance Test specifications Table (HS-RTT) in table A.1 serves a number of purposes,
as follows:
• it provides a statement of all the requirements in words and by cross reference to (a) specific clause(s) in the
present document or to (a) specific clause(s) in (a) specific referenced document(s);
• it provides a statement of all the test procedures corresponding to those requirements by cross reference to (a)
specific clause(s) in the present document or to (a) specific clause(s) in (a) specific referenced document(s);
• it qualifies each requirement to be either:
- Unconditional: meaning that the requirement applies in all circumstances, or
- Conditional: meaning that the requirement is dependant on the manufacturer having chosen to support
optional functionality defined within the schedule.
• in the case of Conditional requirements, it associates the requirement with the particular optional service or
functionality;
• it qualifies each test procedure to be either:
- Essential: meaning that it is included with the Essential Radio Test Suite and therefore the requirement
shall be demonstrated to be met in accordance with the referenced procedures;
- Other: meaning that the test procedure is illustrative but other means of demonstrating compliance with
the requirement are permitted.
Table A.1: HS Requirements and conformance Test specifications Table (HS-RTT)
Harmonized Standard EN 302 248
The following requirements and test specifications are relevant to the presumption of conformity
under the article 3.2 of the R&TTE Directive
Requirement Requirement Conditionality Test Specification
No Description Reference: U/C Condition E/O Reference:
Clause No Clause No
1 Radiated 4.2.1 U E 5.3.1
emissions
2 Operating 4.2.2 U E 5.3.2
frequency
3 Transmitter 4.2.3 U E 5.3.3
pulse power
4 Out of band 4.2.4 U E 5.3.4
emissions
5 Radiated 4.2.5 U E 5.3.5
spurious
emissions
Key to columns:
Requirement:
No A unique identifier for one row of the table which may be used to identify a requirement or its test
specification.
Description A textual reference to the requirement.
ETSI
17 ETSI EN 302 248 V1.1.2 (2008-06)
Clause Number Identification of clause(s) defining the requirement in the present document unless another
document is referenced explicitly.
Requirement Conditionality:
U/C Indicates whether the requirement is to be unconditionally applicable (U) or is conditional upon
the manufacturers claimed functionality of the equipment (C).
Condition Explains the conditions when the requirement shall or shall not be applicable for a technical
requirement which is classified "conditional".
Test Specification:
E/O Indicates whether the test specification forms part of the Essential Radio Test Suite (E) or whether
it is one of the Other Test Suite (O).
NOTE: All tests whether "E" or "O" are relevant to the requirements. Rows designated "E" collectively make up
the Essential Radio Test Suite; those designated "O" make up the Other Test Suite; for those designated
"X" there is no test specified corresponding to the requirement. The completion of all tests classified "E"
as specified with satisfactory outcomes is a necessary condition for a presumption of conformity.
Compliance with requirements associated with tests classified "O" or "X" is a necessary condition for
presumption of conformity, although conformance with the requirement may be claimed by an equivalent
test or by manufacturer's assertion supported by appropriate entries in the technical construction file.
Clause Number Identification of clause(s) defining the test specification in the present document unless another
document is referenced explicitly. Where no test is specified (that is, where the previous field is
"X") this field remains blank.
ETSI
18 ETSI EN 302 248 V1.1.2 (2008-06)
Annex B (normative):
Radiated measurement
B.1 Test sites and general arrangements for
measurements involving the use of radiated fields
This normative annex introduces three most commonly available test sites, an anechoic chamber, an anechoic chamber
with a ground plane and an Open Area Test Site (OATS), which may be used for radiated tests. These test sites are
generally referred to as free field test sites. Both absolute and relative measurements can be performed in these sites.
Where absolute measurements are to be carried out, the chamber should be verified. A detailed verification procedure is
described in TR 102 273 [5] relevant parts 2, 3 and 4.
NOTE: To ensure reproducibility and traceability of radiated measurements only these test sites should be used in
test measurements.
B.1.1 Anechoic chamber
An anechoic chamber is an enclosure, usually shielded, whose internal walls, floor and ceiling are covered with radio
absorbing material, normally of the pyramidal urethane foam type. The chamber usually contains an antenna support at
one end and a turntable at the other. A typical anechoic chamber is shown in figure B.1.
Turntable
Test
antenna
Radio
absorbing
material
Antenna support
Antenna support
Figure B.1: A typical anechoic chamber
ETSI
Range length 3 m or 0 m
19 ETSI EN 302 248 V1.1.2 (2008-06)
The chamber shielding and radio absorbing material work together to provide a controlled environment for testing
purposes. This type of test chamber attempts to simulate free space conditions.
The shielding provides a test space, with reduced levels of interference from ambient signals and other outside effects,
whilst the radio absorbing material minimizes unwanted reflections from the walls and ceiling which can influence the
measurements. In practice it is relatively easy for shielding to provide high levels (80 dB to 140 dB) of ambient
interference rejection, normally making ambient interference negligible.
A turntable is capable of rotation through 360° in the horizontal plane and it is used to support the test sample (EUT) at a
suitable height (e.g. 1 m) above the ground plane. The chamber shall be large enough to allow the measuring distance of at
least 3 m or 2(d +d ) /λ (m), whichever is greater (see clause B.2.5). The distance used in actual measurements shall be
1 2
recorded with the test results.
The anechoic chamber generally has several advantages over other test facilities. There is m
...

SLOVENSKI STANDARD
01-oktober-2008
(OHNWURPDJQHWQD]GUXåOMLYRVWLQ]DGHYHY]YH]L]UDGLMVNLPVSHNWURP(50
1DYLJDFLMVNLUDGDU]DXSRUDERQDSORYLOLKEUH]RSUHPH62/$6+DUPRQL]LUDQL(1
NL]DMHPDELVWYHQH]DKWHYHþOHQDGLUHNWLYH5 77(
Electromagnetic compatibility and Radio spectum Matters (ERM) - Navigation radar for
use on non-SOLAS vessels: Harmonized EN covering essential requirements of article
3.2 of the R&TTE Directive
Ta slovenski standard je istoveten z: EN 302 248 Version 1.1.2
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Harmonized European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Navigation radar for use on non-SOLAS vessels;
Harmonized EN covering the essential requirements
of article 3.2 of the R&TTE Directive

2 ETSI EN 302 248 V1.1.2 (2008-06)

Reference
DEN/ERM-TG26-059
Keywords
maritime, navigation, radar, radio
ETSI
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© European Telecommunications Standards Institute 2008.
All rights reserved.
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ETSI
3 ETSI EN 302 248 V1.1.2 (2008-06)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.6
2.1 Normative references.6
2.2 Informative references.7
3 Symbols and abbreviations.7
3.1 Symbols.7
3.2 Abbreviations.7
4 Technical requirements .8
4.1 Environmental profile.8
4.2 Conformance requirements.8
4.2.1 Radiated emissions.8
4.2.1.1 Definition.8
4.2.1.2 Limits.8
4.2.1.3 Conformance.8
4.2.2 Operating frequency.8
4.2.2.1 Definition.8
4.2.2.2 Limits.8
4.2.2.3 Conformance.9
4.2.3 Transmitter pulse power .9
4.2.3.1 Definition.9
4.2.3.2 Limits.9
4.2.3.3 Conformance.9
4.2.4 Out of band emissions.9
4.2.4.1 Definition.9
4.2.4.2 Limits.10
4.2.4.3 Conformance.10
4.2.5 Radiated spurious emissions.10
4.2.5.1 Definition.10
4.2.5.2 Limits.10
4.2.5.3 Conformance.10
5 Testing for compliance with technical requirements.11
5.1 Test conditions, power supply and ambient temperatures.11
5.1.1 Standard operating mode of the radar equipment .11
5.1.2 Normal test conditions .11
5.1.2.1 Normal temperature and humidity .11
5.1.2.2 Normal test power supply .11
5.1.2.2.1 AC test power supply .11
5.1.2.2.2 DC test power supply .12
5.1.3 Extreme test conditions.12
5.1.3.1 Extreme temperatures.12
5.1.3.1.1 Indoor unit .12
5.1.3.1.2 Outdoor unit .12
5.1.3.2 Extreme power supply voltage test conditions.12
5.2 Interpretation of the measurement results .12
5.3 Essential radio test suites.13
5.3.1 Radiated emissions.13
5.3.2 Operating frequency.13
5.3.3 Transmitter pulse power .14
5.3.4 Out of band emissions.14
5.3.5 Radiated spurious emissions.14
5.4 Other test specifications.15
ETSI
4 ETSI EN 302 248 V1.1.2 (2008-06)
Annex A (normative): HS Requirements and conformance Test specifications Table (HS-
RTT).16
Annex B (normative): Radiated measurement.18
B.1 Test sites and general arrangements for measurements involving the use of radiated fields .18
B.1.1 Anechoic chamber.18
B.1.2 Anechoic chamber with a ground plane .19
B.1.3 OATS.20
B.1.4 Test antenna.21
B.1.5 Substitution antenna.21
B.1.6 Measuring antenna.22
B.2 Guidance on the use of radiation test sites .22
B.2.1 Verification of the test site .22
B.2.2 Preparation of the EUT.22
B.2.3 Power supplies to the EUT.22
B.2.4 Volume control setting for analogue speech tests .22
B.2.5 Range length.23
B.2.6 Site preparation.23
Annex C (normative): Transmission power and unwanted emissions of radar systems;
measuring methods.25
C.1 Indirect connection via the rotating joint.25
C.2 Maximum permitted out of band emissions power levels.26
C.3 Maximum permitted spurious emissions power levels .27
Annex D (informative): The EN title in the official languages .28
History .30

ETSI
5 ETSI EN 302 248 V1.1.2 (2008-06)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI 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 not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document is a harmonized EN covering essential requirements under article 3.2 of the R&TTE directive for
navigation radar for use on non-SOLAS vessels.
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC [i.2] (as amended) laying down a procedure for the provision of information in the
field of technical standards and regulations.
The present document is intended to become a Harmonized Standard, the reference of which will be published in the
Official Journal of the European Communities referencing the Directive 1999/5/EC [i.1] of the European Parliament
and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual
recognition of their conformity ("the R&TTE Directive").
Technical specifications relevant to Directive 1999/5/EC [i.1] are given in annex A.

National transposition dates
Date of adoption of this EN: 13 June 2008
Date of latest announcement of this EN (doa): 30 September 2008
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 2009
Date of withdrawal of any conflicting National Standard (dow): 31 March 2010

ETSI
6 ETSI EN 302 248 V1.1.2 (2008-06)
1 Scope
The present document applies to non-SOLAS radar equipment.
The present document is intended to cover the provisions of Directive 1999/5/EC [i.1] (R&TTE Directive) Article 3.2,
which states that "… radio equipment shall be so constructed that it effectively uses the spectrum allocated to
terrestrial/space radio communications and orbital resources so as to avoid harmful interference".
In addition to the present document, other ENs that specify technical requirements in respect of essential requirements
under other parts of Article 3 of the R&TTE Directive [i.1] may apply to equipment within the scope of the present.
This radar equipment operates in the frequency range 2 900 MHz to 3 100 MHz or 9 300 MHz to 9 500 MHz allocated
to the radio navigation service as defined in article 5 of the Radio Regulations [6].
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only
the edition cited applies. For non-specific references, the latest edition of the referenced document (including any
amendments) applies.
[1] CENELEC EN 60945 (Edition 4 - 2002): "Maritime navigation and radiocommunication
equipment and systems - General requirements - Methods of testing and required test results".
[2] ITU-R Recommendation M.1177-3 (2003): "Techniques for measurement of unwanted emissions
of radar systems".
[3] ANSI C63.5 (1988): "American National Standard for Calibration of Antennas Used for Radiated
Emission Measurements in Electromagnetic Interference (EMI) Control".
[4] ETSI TR 100 028 (V1.3.1 - all parts): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
ETSI
7 ETSI EN 302 248 V1.1.2 (2008-06)
[5] ETSI TR 102 273 (2001): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
[6] ITU Radio Regulations.
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] Directive 1999/5/EC of The European Parliament and of the Council of 9 March 1999 on radio
equipment and telecommunications terminal equipment and the mutual recognition of their
conformity (R&TTE Directive).
[i.2] Directive 98/34/EC of the European Parliament and of the Council laying down a procedure for
the provision of information in the field of technical standards and regulations and of rules on
information society services.
[i.3] ITU-R Recommendation SM.1541-1: "Unwanted emissions in the out-of-band domain".
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the following symbols apply:
B -40 dB bandwidth
-40
P Transmission mean power
m
P Transmission pulse power
t
t Time
t Transmission pulse duration
p
t Pulse rise time
r
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
EBL Electronic Bearing Line
EUT Equipment Under Test
FTC Fast Time Constant
HS Harmonized Standard
LNA Low Noise Amplifier
OATS Open Area Test Site
OOB Out Of Band
PEP Peak Envelope Power
PRT Pulse Repetition Time
RF Radio Frequency
RJ Rotary Joint
SOLAS Safety Of Life At Sea
STC Sensitivity Time Control
VRM Variable Range Marker
VSWR Voltage Standing Wave Radio
ETSI
8 ETSI EN 302 248 V1.1.2 (2008-06)
4 Technical requirements
4.1 Environmental profile
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
declared operational environmental profile which, as a minimum, shall be that specified in the test conditions contained
in the present document.
As technical performance varies subject to environmental conditions, tests shall be carried out under a sufficient variety
of environmental conditions as specified in the present document to give confidence of compliance for the affected
technical requirements (which shall also be within the boundary limits of the declared operational environmental
profile).
4.2 Conformance requirements
4.2.1 Radiated emissions
4.2.1.1 Definition
Radiated electromagnetic emissions are to be understood as any signals radiated by the completely assembled and
operated radar equipment, other than the operating frequency, with its spectra, which can potentially disturb other
equipment on the ship, such as radio receivers or rate of turn indicators.
4.2.1.2 Limits
In the frequency range 150 kHz to 2 GHz, the measured radio frequency field strength at a distance of 3 m caused by
the EUT shall not exceed the limits shown in table 1.
Table 1: Radiated electromagnetic emission
Frequency range Measuring Bandwidth Limits
150 kHz to 300 kHz 9 kHz
10 mV/m to 316 μV/m (80 dBμV/m to 52 dBμV/m)
300 kHz to 30 MHz 9 kHz 316 μV/m to 50 μV/m (52 dBμV/m to 34 dBμV/m)
30 MHz to 156 MHz 120 kHz
500 μV/m (54 dBμV/m)
and 165 MHz to 2 GHz
156 MHz to 165 MHz 9 kHz 16 μV/m (24 dBμV/m) quasi peak or
32 μV /m (30 dBμV/m) peak
4.2.1.3 Conformance
Conformance tests as defined in clause 5.3.1 shall be carried out.
4.2.2 Operating frequency
4.2.2.1 Definition
The transmitter produces short microwave pulses, which causes a broad frequency spectrum, depending on the pulse
duration and the pulse repetition frequency. The operating frequency is to be understood as the frequency of the
microwave during the transmitting pulse and is represented by the spectral line of highest amplitude.
4.2.2.2 Limits
In all switchable distance ranges and pulse durations the operation frequency of the radar equipment shall have values
in the range of 2 900 MHz to 3 100 MHz or 9 300 MHz to 9 500 MHz.
ETSI
9 ETSI EN 302 248 V1.1.2 (2008-06)
4.2.2.3 Conformance
Conformance tests as defined in clause 5.3.2 shall be carried out.
4.2.3 Transmitter pulse power
4.2.3.1 Definition
Transmitter pulse power P is to be understood as the mean value of the microwave power during the transmission pulse
t
at the antenna side of the Rotary Joint (RJ). For the arithmetic mean value of the transmitting power, integrated over the
PRT, the abbreviation P will be used.
m
4.2.3.2 Limits
The transmitter pulse power P shall be as specified by the manufacturer +0 dB to -3 dB.
t
4.2.3.3 Conformance
Conformance tests as defined in clause 5.3.3 shall be carried out.
4.2.4 Out of band emissions
4.2.4.1 Definition
ITU-R Recommendation SM.1541-1 [i.3] gives guidance to calculate the -40 dB bandwidth and to specify the OOB
mask for primary radars in per cent of the -40 dB bandwidth (see figure 1).
The -40 dB bandwidth (B ) for primary radars shall be determined with the following established formula by using the
-40
lesser of:
K 64
B = or
−40
t
t ×t
r
where the coefficient K is 6,2 for radars with output power greater than 100 kW and 7,6 for lower-power radars and
radars operating in the radio navigation service in the 2 900 MHz to 3 100 MHz and 9 300 MHz to 9 500 MHz band.
The latter expression applies if the rise time t is less than about 0,0094t when K is 6,2 or about 0,014t when K is 7,6.
r
Attenuation (dBpp)
0 100 200 300 400 500 600
Frequency separation (per cent of 40 dB bandwidth)

Figure 1: OOB mask for primary radars
ETSI
10 ETSI EN 302 248 V1.1.2 (2008-06)
For ideal rectangular pulses, the spectrum falls off at 20 dB per decade leading to a B of 6,4/t and a 40 dB bandwidth
-40
ten times as large, i.e. 64/t. To discourage the use of pulses with abrupt rise and fall times, no margin is allowed. The
spectra of trapezoidal pulses fall off firstly at 20 dB per decade and then ultimately at 40 dB per decade. If the radio or
rise time to pulse duration exceeds 0,008 the 40 dB points will fall on the 40 dB per decade slope, in which case the
bandwidth B would be:
-40
5,7
B =
−40
t×t
r
e.g. a radar with a fixed 10 ns rise time would result in bandwidth values as shown in table 2.
Table 2: Examples of -40 dB bandwidth of a primary radar
at different pulse durations (rise time = 10 ns)
Pulse duration - 40 dB bandwidth B
-40
Short pulse (t = 50 ns) B = 255 MHz
-40
Medium Pulse (t = 200 ns) B = 127 MHz
-40
B = 81 MHz
Long Pulse (t = 500 ns)
-40
4.2.4.2 Limits
The maximum radiated Out Of Band-emission power level shall not exceed the limits given in figure C.3.
4.2.4.3 Conformance
Conformance tests as defined in clause 5.3.4 shall be carried out.
4.2.5 Radiated spurious emissions
4.2.5.1 Definition
Spurious emissions are defined as the entity of all emissions in the frequency range of 70 % of the cut-off frequency of
the waveguide to 26 GHz, but outside the OOB-boundaries.
They include:
• harmonic emissions (whole multiples of the operating frequency);
• parasitic emissions (independent, accidentally);
• intermodulation (between oscillator- and operation frequency or between oscillator and harmonics);
• emissions caused by frequency conversions.
4.2.5.2 Limits
All radiated spurious emission levels shall be 43+10 log PEP or 60 dB below the PEP level of the radiated operating
frequency (see figure C.3) whichever is less stringent.
4.2.5.3 Conformance
Conformance tests as defined in clause 5.3.5 shall be carried out.
ETSI
11 ETSI EN 302 248 V1.1.2 (2008-06)
5 Testing for compliance with technical requirements
5.1 Test conditions, power supply and ambient temperatures
5.1.1 Standard operating mode of the radar equipment
Unless otherwise stated the radar equipment shall be set to the standard operating mode which is understood to be as
follows:
Operation state: on (antenna turns);
Antenna height: 7 m;
RANGE: shortest;
TUNE setting: optimal;
GAIN setting: optimal;
STC setting: zero;
FTC setting: off;
Range rings: visible;
VRM: visible;
EBL: visible;
Brilliance of all attributes: optimal (well readable).
5.1.2 Normal test conditions
5.1.2.1 Normal temperature and humidity
The temperature and humidity conditions for tests shall be a combination of temperature and humidity within the
following ranges:
o o
a) temperature: +15 C to +35 C; or within the manufacturers stated operating range and stated in the
report;
b) relative humidity: 20 % to 75 %.
When the relative humidity is lower than 20 %, it shall be stated in the test report.
5.1.2.2 Normal test power supply
5.1.2.2.1 AC test power supply
The test voltage for equipment to be connected to an AC supply shall be the nominal mains voltage declared by the
manufacturer -10 % to +10 %. For the purpose of the present document, the nominal voltage shall be the declared
voltage or any of the declared voltages for which the equipment is indicated as having been designed. The frequency of
the test voltage shall be 50 Hz ±1 Hz.
ETSI
12 ETSI EN 302 248 V1.1.2 (2008-06)
5.1.2.2.2 DC test power supply
Where the equipment is designed to operate from a DC source, the normal test voltage shall be the nominal voltage as
declared by the manufacturer -10 % to +20 %.
The internal impedance of the test power source shall be low enough for its effect on the test results to be negligible.
For the purpose of testing the power source voltage shall be measured at the input terminals of the equipment.
During testing, the power source voltages shall be maintained within a tolerance of ±3 % relative to the voltage level at
the beginning of each test.
5.1.3 Extreme test conditions
5.1.3.1 Extreme temperatures
5.1.3.1.1 Indoor unit
The temperature and humidity conditions for extreme tests shall be a combination of nominal temperature and humidity
within the following ranges:
o o
a) temperature: 0 C to +40 C;
b) relative humidity: 20 % to 75 %.
When the relative humidity is lower than 20 %, it shall be stated in the test report.
5.1.3.1.2 Outdoor unit
The temperature and humidity conditions for extreme tests shall be a combination of nominal temperature and humidity
within the following ranges:
o o
a) temperature: -20 C to +55 C;
b) relative humidity: 20 % to 93 %.
When the relative humidity is lower than 20 %, it shall be stated in the test report.
5.1.3.2 Extreme power supply voltage test conditions
The extreme power supply test voltages applied to the equipment shall be according to table 3.
Table 3: Extreme power supply voltage and frequency tolerances
Power supply Voltage variation % Frequency variation %
AC
±10 ±5
DC +20 Not applicable
-10
5.2 Interpretation of the measurement results
The interpretation of the results recorded in a test report for the measurements described in the present document shall
be as follows:
• the measured value related to the corresponding limit shall be used to decide whether an equipment meets the
requirements of the present document;
• the value of the measurement uncertainty for the measurement of each parameter shall be included in the test
report;
ETSI
13 ETSI EN 302 248 V1.1.2 (2008-06)
• the recorded value of the measurement uncertainty shall be, for each measurement, equal to or lower than the
figures in table 2.
For the test methods, according to the present document, the measurement uncertainty figures shall be calculated in
accordance with TR 100 028 [4] and shall correspond to an expansion factor (coverage factor) k = 1,96 or k = 2 (which
provide confidence levels of respectively 95 % and 95,45 % in the case where the distributions characterizing the actual
measurement uncertainties are normal (Gaussian)).
Table 4 is based on such expansion factors.
Table 4: Absolute measurement uncertainties: maximum values
Parameter Maximum uncertainty
-
RF frequency 7
1 x 10
RF pulse power 1,5 dB
Radiated emission of transmitter 6 dB

5.3 Essential radio test suites
5.3.1 Radiated emissions
On a test site selected from annex B, the EUT shall be placed on a non-conductive support with a height of 1,5 m.
When the EUT consists of more than one unit the interconnecting cables shall have the maximum length and type as
indicated by the manufacturer or 20 m whichever is shorter. Available input and output ports of the ancillary equipment
under test shall be connected to the maximum length of cable as indicated by the manufacturer or 20 m whichever is
shorter and terminated to simulate the impedance of the relevant ports of the radio equipment. These cables shall be
bundled at the approximate centre of the cable with the bundles of 30 cm to 40 cm in length running in the horizontal plane
from the port to which it is connected. If it is impractical to do so because of cable bulk or stiffness, the disposition of the
excess cable shall be precisely noted in the test report.
The test antenna shall be placed at a radial distance of 3 m from the edge of the minimum dimension circle, the smallest
dimension circle in the horizontal plane that encloses all elements of the indoor- and the outdoor -units, at a height of
1,5 m above the ground plane.
The test method shall be according to EN 60945 [1].
The radiated emission of the EUT shall be measured in the frequency range 150 kHz to 2 GHz.
The results obtained shall be compared to the limits in clause 4.2.1.2 in order to prove compliance with the requirement.
5.3.2 Operating frequency
The antenna shall be replaced by a suitable adapter to adapt the rotary joint to a waveguide with a plane flange. This
adapter shall be provided by the radar manufacturer. On that flange a high-power directional coupler will be mounted
with its main port terminated by a matching high-power dummy load. The coupled port shall have an adequate
attenuation within the whole frequency band 2 800 MHz to 3 200 MHz or 8 900 MHz to 9 900 MHz to protect the
measurement equipment.
To measure and display the transmitted signal a suitable spectrum analyser will be used. The spectral line of highest
amplitude will be considered to be the operating frequency.
Alternatively the operating frequency can be measured as well with a direct reading frequency meter.
The results obtained shall be compared to the limits in clause 4.2.2.2 in order to prove compliance with the requirement.
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14 ETSI EN 302 248 V1.1.2 (2008-06)
5.3.3 Transmitter pulse power
The antenna shall be replaced by a suitable adapter to adapt the rotary joint to a waveguide with a plane flange. This
adapter shall be provided by the radar manufacturer. On that flange a high-power directional coupler will be mounted
with its main port terminated by a matching high-power dummy load. The coupled port shall have a known attenuation
of about 40 dB within the whole frequency band 2 800 MHz to 3 200 MHz or 8 900 MHz to 9 900 MHz.
To determine the pulse power, the use of both, a mean power meter or a suitable pulse power meter with direct reading
of the transmitter pulse power is permitted. In case of measurement with a mean power meter the transmission pulse
duration t and the pulse repetition time PRT have to be determined in a preceding step i.e. by use of a detector and an
p
oscilloscope. Then the transmitter pulse power P is calculated as follows:
t
P = P × PRT/t
t m p
The results obtained shall be compared to the limits in clause 4.2.3.2 in order to prove compliance with the requirement.
5.3.4 Out of band emissions
To perform the measurement, the radar and the measuring equipment shall be installed as described in the
ITU-R Recommendation M.1177-3 [2]. Then the radar equipment shall be set to the shortest range (shortest pulse
duration).
Measures described in the ITU-R Recommendation M.1177-3 [2] shall be taken to ensure that interferences caused by
multiple reflections do not occur.
The radiated out of band power emission shall be measured in the frequency bands given in table 5 with the antenna
rotating using the selected method from those described in the ITU-R Recommendation M.1177-3 [2].
The results obtained shall be compared to the limits in clause 4.2.4.2 in order to prove compliance with the requirement.
Table 5: Out of band emissions measurement bands
Operating frequency Lower measurement band Upper measurement band
9,3 GHz to 9,5 GHz 8,0 GHz to 9,3 GHz 9,5 GHz to 10,8 GHz
2,9 GHz to 3,1 GHz 2,7 GHz to 2,9 GHz 3,1 GHz to 3,3 GHz

5.3.5 Radiated spurious emissions
To perform the measurement, the radar and the measuring equipment shall be installed as described in the ITU-R
Recommendation M.1177-3 [2]. Then the radar equipment shall be set to the shortest range (shortest pulse duration).
Measures described in the ITU-R Recommendation M.1177-3 [2] shall be taken to ensure that interferences caused by
multiple reflections do not occur.
The radiated spurious power emission shall be measured in several overlapping frequency sweep steps in the frequency
bands given in table 6.
If required to reach a dynamic amplitude measuring range of 70 dB minimum, a Low Noise Amplifier (LNA), and a
notch filter for the operating frequency should be used.
The results obtained shall be compared to the limits in clause 4.2.5.2 in order to prove compliance with the requirement.
Table 6: Spurious emissions measurement bands
Operating frequency Lower measurement band Upper measurement band
9,3 GHz to 9,5 GHz 4,5 GHz to 8,0 GHz 10,8 GHz to 26 GHz
2,9 GHz to 3,1 GHz 2,0 GHz to 2,7 GHz 3,3 GHz to 26 GHz

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15 ETSI EN 302 248 V1.1.2 (2008-06)
5.4 Other test specifications
There are no tests under this clause.
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16 ETSI EN 302 248 V1.1.2 (2008-06)
Annex A (normative):
HS Requirements and conformance Test specifications
Table (HS-RTT)
The HS Requirements and conformance Test specifications Table (HS-RTT) in table A.1 serves a number of purposes,
as follows:
• it provides a statement of all the requirements in words and by cross reference to (a) specific clause(s) in the
present document or to (a) specific clause(s) in (a) specific referenced document(s);
• it provides a statement of all the test procedures corresponding to those requirements by cross reference to (a)
specific clause(s) in the present document or to (a) specific clause(s) in (a) specific referenced document(s);
• it qualifies each requirement to be either:
- Unconditional: meaning that the requirement applies in all circumstances, or
- Conditional: meaning that the requirement is dependant on the manufacturer having chosen to support
optional functionality defined within the schedule.
• in the case of Conditional requirements, it associates the requirement with the particular optional service or
functionality;
• it qualifies each test procedure to be either:
- Essential: meaning that it is included with the Essential Radio Test Suite and therefore the requirement
shall be demonstrated to be met in accordance with the referenced procedures;
- Other: meaning that the test procedure is illustrative but other means of demonstrating compliance with
the requirement are permitted.
Table A.1: HS Requirements and conformance Test specifications Table (HS-RTT)
Harmonized Standard EN 302 248
The following requirements and test specifications are relevant to the presumption of conformity
under the article 3.2 of the R&TTE Directive
Requirement Requirement Conditionality Test Specification
No Description Reference: U/C Condition E/O Reference:
Clause No Clause No
1 Radiated 4.2.1 U E 5.3.1
emissions
2 Operating 4.2.2 U E 5.3.2
frequency
3 Transmitter 4.2.3 U E 5.3.3
pulse power
4 Out of band 4.2.4 U E 5.3.4
emissions
5 Radiated 4.2.5 U E 5.3.5
spurious
emissions
Key to columns:
Requirement:
No A unique identifier for one row of the table which may be used to identify a requirement or its test
specification.
Description A textual reference to the requirement.
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17 ETSI EN 302 248 V1.1.2 (2008-06)
Clause Number Identification of clause(s) defining the requirement in the present document unless another
document is referenced explicitly.
Requirement Conditionality:
U/C Indicates whether the requirement is to be unconditionally applicable (U) or is conditional upon
the manufacturers claimed functionality of the equipment (C).
Condition Explains the conditions when the requirement shall or shall not be applicable for a technical
requirement which is classified "conditional".
Test Specification:
E/O Indicates whether the test specification forms part of the Essential Radio Test Suite (E) or whether
it is one of the Other Test Suite (O).
NOTE: All tests whether "E" or "O" are relevant to the requirements. Rows designated "E" collectively make up
the Essential Radio Test Suite; those designated "O" make up the Other Test Suite; for those designated
"X" there is no test specified corresponding to the requirement. The completion of all tests classified "E"
as specified with satisfactory outcomes is a necessary condition for a presumption of conformity.
Compliance with requirements associated with tests classified "O" or "X" is a necessary condition for
presumption of conformity, although conformance with the requirement may be claimed by an equivalent
test or by manufacturer's assertion supported by appropriate entries in the technical construction file.
Clause Number Identification of clause(s) defining the test specification in the present document unless another
document is referenced explicitly. Where no test is specified (that is, where the previous field is
"X") this field remains blank.
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18 ETSI EN 302 248 V1.1.2 (2008-06)
Annex B (normative):
Radiated measurement
B.1 Test sites and general arrangements for
measurements involving the use of radiated fields
This normative annex introduces three most commonly available test sites, an anechoic chamber, an anechoic chamber
with a ground plane and an Open Area Test Site (OATS), which may be used for radiated tests. These test sites are
generally referred to as free field test sites. Both absolute and relative measurements can be performed in these sites.
Where absolute measurements are to be carried out, the chamber should be verified. A detailed verification procedure is
described in TR 102 273 [5] relevant parts 2, 3 and 4.
NOTE: To ensure reproducibility and traceability of radiated measurements only these test sites should be used in
test measurements.
B.1.1 Anechoic chamber
An anechoic chamber is an enclosure, usually shiel
...