ETSI EN 300 674-2-1 V3.1.1 (2022-03)

HARMONISED EUROPEAN STANDARD
Transport and Traffic Telematics (TTT);
Dedicated Short Range Communication (DSRC)
transmission equipment (500 kbit/s / 250 kbit/s)
operating in the 5 795 MHz to 5 815 MHz frequency band;
Part 2: Harmonised Standard for access to radio spectrum;
Sub-part 1: Road Side Units (RSU)

2 ETSI EN 300 674-2-1 V3.1.1 (2022-03)

Reference
REN/ERM-TG37-271
Keywords
data, DSRC, harmonised standard, radio,
regulation, RTTT, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2022.
All rights reserved.
ETSI
3 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 10
4 Technical requirements specifications . 11
4.1 Units . 11
4.2 General characteristics . 11
4.2.1 RSU classes . 11
4.2.2 Carrier frequencies . 12
4.2.3 Modulation . 12
4.2.4 Antenna characteristic . 12
4.3 Testing for compliance with technical requirements . 12
4.3.1 Environmental conditions for testing . 12
4.3.2 Environmental test conditions. 13
4.3.2.1 General . 13
4.3.2.2 Normal test conditions . 13
4.3.2.3 Extreme test conditions . 13
4.3.3 Power supply . 13
4.4 Conformance requirements . 13
4.4.1 General requirements . 13
4.4.2 Transmitter requirements . 13
4.4.2.1 Maximum equivalent isotropically radiated power . 13
4.4.2.1.1 Definition. 13
4.4.2.1.2 Limit . 13
4.4.2.1.3 Conformance . 13
4.4.2.2 Transmitter frequency error . 14
4.4.2.2.1 Definition. 14
4.4.2.2.2 Limit . 14
4.4.2.2.3 Conformance . 14
4.4.2.3 Transmitter spectrum mask . 14
4.4.2.3.1 Definition. 14
4.4.2.3.2 Limits . 14
4.4.2.3.3 Conformance . 16
4.4.2.4 Transmitter unwanted emissions . 16
4.4.2.4.1 Definition. 16
4.4.2.4.2 Limits . 16
4.4.2.4.3 Conformance . 16
4.4.3 Receiver requirements . 17
4.4.3.1 Receiver unwanted emissions . 17
4.4.3.1.1 Definition. 17
4.4.3.1.2 Limits . 17
4.4.3.1.3 Conformance . 17
4.4.3.2 Receiver selectivity . 17
4.4.3.2.1 Receiver blocking . 17
4.4.3.2.2 Receiver adjacent channel selectivity . 18
4.4.3.2.3 Receiver co-channel rejection . 18
4.4.3.3 Receiver dynamic range and sensitivity . 19
4.4.3.3.1 Receiver sensitivity . 19
ETSI
4 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
4.4.3.3.2 Receiver dynamic range . 19
5 Testing for compliance with technical requirements . 20
5.1 Environmental conditions for testing . 20
5.2 Radio test suites . 20
5.2.1 Transmitter parameter tests . 20
5.2.1.1 Maximum equivalent isotropically radiated power . 20
5.2.1.2 Transmitter frequency error . 21
5.2.1.3 Transmitter spectrum mask . 21
5.2.1.4 Transmitter unwanted emissions . 22
5.2.2 Receiver parameter tests . 23
5.2.2.1 Receiver unwanted emissions in the spurious domain . 23
5.2.2.2 Receiver selectivity . 24
5.2.2.2.1 General Requirements and prerequisites for testing . 24
5.2.2.2.2 Receiver blocking test execution . 24
5.2.2.2.3 Receiver adjacent channel selectivity test execution . 25
5.2.2.2.4 Receiver co-channel rejection test execution. 25
5.2.2.3 Receiver dynamic range and sensitivity test execution . 26
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 28
Annex B (normative): General condition for testing and test setup . 30
B.1 General conditions . 30
B.1.1 Power source . 30
B.1.2 Thermal balance . 30
B.1.3 Test signals . 31
B.1.4 Shielded anechoic chamber . 31
B.1.5 RF cables . 32
B.1.6 Splitter . 32
B.1.7 Spectrum analyser . 33
B.2 Conducted measurements . 33
B.2.1 Test site requirements . 33
B.2.2 Test arrangement for conducted Tx parameter measurements . 33
B.3 Radiated measurements . 34
B.3.1 Test site requirements . 34
B.3.1.1 Measurement distances . 34
B.3.1.2 Substitution method . 34
B.3.1.3 Test and substitution antennas . 35
B.3.2 Test arrangement for the radiated measurement of the transmit parameters . 35
B.3.3 Arrangement for radiated measurements of the receiver parameters . 36
B.3.4 Antenna decoupling loss . 39
B.4 RSU carrier modulation. 39
B.5 Bit error ratio measurements . 40
B.5.1 Basics . 40
B.5.2 BER measurement . 40
B.5.3 FER measurement . 40
B.5.3.1 Mathematical expressions . 40
B.5.3.2 Equipment . 41
B.5.3.3 Procedure . 41
Annex C (informative): Maximum Measurement Uncertainty . 42
Annex D (informative): Checklist . 43
Annex E (informative): Bibliography . 44
Annex F (informative): Change History . 45
History . 46

ETSI
5 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are 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 (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM).
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.4] to
provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation
of the laws of the Member States relating to the making available on the market of radio equipment and repealing
Directive 1999/5/EC [i.3].
Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present
document, a presumption of conformity with the corresponding essential requirements of that Directive and associated
EFTA regulations.
The present document complies with the Commission Implementing Decision (EU) 2019/1345 [i.1] and CEPT/ERC
Recommendation 70-03 [i.2].
The present document is part 2, sub-part 1 of a multi-part deliverable covering Transport and Traffic Telematics (TTT);
Dedicated Short Range Communication (DSRC) transmission equipment (500 kbit/s / 250 kbit/s) operating in the
5 795 MHz to 5 815 MHz frequency band, as identified below:
Part 1: "General characteristics and test methods for Road Side Units (RSU) and On-Board Units (OBU)";
Part 2: "Harmonised Standard for access to radio spectrum";
Sub-part 1: "Road Side Units (RSU)";
Sub-part 2: "On-Board Units (OBU)".

ETSI
6 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
National transposition dates
Date of adoption of this EN: 24 January 2022
Date of latest announcement of this EN (doa): 30 April 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 October 2022
Date of withdrawal of any conflicting National Standard (dow): 31 October 2023

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
7 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
1 Scope
The present document specifies technical characteristics and methods of measurements for Transport and Traffic
Telematics (TTT) systems intended to be operated as Road Side Units (RSU) with the following characteristics:
• with a Radio Frequency (RF) connection and specified antenna or with an integral antenna;
• used for data transmission only;
• operating in the 5 795 MHz to 5 815 MHz frequency band (see also table 1).
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.3] is given in annex A.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] EN 12253:2004: "Road transport and traffic telematics - Dedicated short-range communication -
Physical layer using microwave at 5,8 GHz", (produced by CEN).
[2] ISO 14906:2018/AMD 1:2020: "Electronic fee collection -- Application interface definition for
dedicated short-range communication -- Amendment 1".
[3] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document, but they assist the
user with regard to a particular subject area.
[i.1] Commission Implementing Decision (EU) 2019/1345 of 2 August 2019 amending Decision
2006/771/EC updating harmonised technical conditions in the area of radio spectrum use for
short-range devices.
[i.2] CEPT/ERC Recommendation 70-03 (2020): "Relating to the use of Short Range Devices (SRD)".
[i.3] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
ETSI
8 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
[i.4] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request
to the European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.5] ETSI EG 203 336 (V1.2.1) (05-2020): "Guide for the selection of technical parameters for the
production of Harmonised Standards covering article 3.1(b) and article 3.2 of Directive
2014/53/EU".
[i.6] CEPT/ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in Directive 2014/53/EU [i.3] and the following apply:
adjacent channel: channel at a distance of 5 MHz relative to the centre frequency, i.e. in the channel at the next upper
or lower centre frequency
bit: acronym for "binary digit" which can have one out of two possible values
EXAMPLE: 0/1, or +1/-1, or low/high.
bit rate: number of bits occurring per unit time, usually expressed in bits per second
boresight: direction of maximum radiation of a directional antenna
carrier frequency: frequency f to which the RSU transmitter is tuned
Tx
carrier signal or carrier: harmonic signal whose nominal single frequency f is capable of being modulated by a
Tx
second, symbol-carrying signal
channel: continuous part of the radio-frequency spectrum to be used for a specified emission or transmission
NOTE: A radio-frequency channel may be defined by two specified limits, or by its centre frequency and its
bandwidth, or any equivalent indication. It is often designated by a sequential number. A radio-frequency
channel may be time-shared in order to allow radio communication in both directions by simplex
operation. The term "channel" is sometimes used to denote two associated radio-frequency channels, each
of which is used for one of two directions of transmission, i.e. in fact a telecommunication circuit.
co-channel: transmission using the same uplink or downlink channel in a frequency band of 5 MHz width
Cross-Polar Discrimination (XPD): ratio P / P of power P of the received left hand circular
Rx,LHCP Rx,RHCP Rx,LHCP
polarized wave to the power P of the received right hand circular wave when the power of the transmitted
Rx,RHCP
waves P is equal to P
Tx,LHCP Tx,RHCP
downlink: transmission in direction from RSU to OBU
environmental profile: range of environmental conditions under which equipment within the scope of the present
document is required to comply with the provisions of the present document
equivalent bandwidth: bandwidth equivalent to the bandwidth of a frequency selective power measurement
equivalent isotropically radiated power (e.i.r.p.): signal power fed into an ideal loss-less antenna radiating equally in
all directions that generates the same power flux at a reference distance as the one generated by a signal fed into the
antenna under consideration in a predefined direction within its far field region
integral antenna: antenna, with or without a connector, designed as an indispensable part of the equipment
monochromatic signal: sinusoidal signal with fixed frequency
ETSI
9 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
operating frequency: nominal frequency at which equipment is operated
NOTE 1: Also referred to as the operating centre frequency.
NOTE 2: Equipment may be able to operate at more than one operating frequency.
out-of-band emissions: emissions on a frequency or frequencies immediately outside the necessary bandwidth which
results from the modulation process and which cannot be reduced without affecting the corresponding transmission of
information, excluding spurious emissions
polarization: locus of the tip of the electrical field vector in a plane perpendicular to the direction of transmission
EXAMPLE: Horizontal and vertical linear polarization.
Left- and right-hand circular polarization.
Portable Equipment (PE): generally intended to be self-contained, free standing and portable
NOTE: A PE would normally consist of a single module, but it may consist of several interconnected modules. It
is powered by one or more internal batteries.
radiated measurements: measurements where the coupling to the EUT is obtained by radiation
receive mode: mode, in which the device receives a backscattered signal from an OBU while the device is transmitting
at the same time an unmodulated carrier to the OBU
Road Side Unit (RSU): equipment that can communicate with an on board unit
spurious emissions: emissions on a frequency, or frequencies, which are outside an exclusion band of ±2,5 times the
channel spacing around the selected centre frequency f , at a level which may be reduced without affecting the
Tx
corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products but exclude out-of-band emissions.
stand-by mode: mode, in which the device may receive DSRC signals, but is never transmitting
transmit mode: mode, in which the device transmits a modulated carrier
unwanted emissions: spurious emissions and out-of-band emissions
uplink: transmission in direction from OBU to RSU
3.2 Symbols
For the purposes of the present document, the following symbols apply:
A Amplitude of CW signal
CW
Amplitude of modulated signal
A
mod
ATN Attenuation of balun
BLN
BER Bit Error Ratio
C Number of frames transmitted
F
C Number of erroneous frames received
E
d Distance between phase centres of transmitting and receiving antenna
d Horizontal displacement of TTA and RTA antenna phase centres
displace
D Directivity relative to an isotropic radiator
i
D Largest linear dimension of test antenna
0,TA
D Largest linear dimension of EUT antenna
0,EUT
EIRP Maximum e.i.r.p. of RSU
max
Δf Relative frequency error of RSU
RSU
ΔP Dynamic range limit
drl
f Frequency
ETSI
10 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
FER Frame error ratio
f Nominal RSU receiver centre frequency
Rx
f Highest operational RSU receiver centre frequency
Rx hi
f Lowest operational RSU receiver centre frequency
Rx lo
f Nominal OBU sub-carrier frequency
s
Nominal RSU carrier frequency
f
Tx
f Actual centre frequency of the downlink carrier
Tx,actual
f Nominal centre frequency of unwanted signal
u
G Gain of receiving substitution antenna
RSA
G Gain of receiving test antenna
RTA
G Gain of RSU transmitting antenna
RTxA
lg(.) Logarithm to the base ten
m Modulation index
N Total number of transmitted bits within a single frame
P Receiver adjacent channel selectivity
acsl
P Receiver blocking capability
bl
Co-channel rejection limit
P
cocr
P Power of CW signal
CW
P Signal power of the received left hand circular polarized wave
Rx,LHCP
P Signal power of the transmitted left hand circular polarized wave
Tx,LHCP
-6
P Maximum receiver input power value for BER ≤ 10
max
-6
P Minimum receiver input power value for BER ≤ 10
min
P Power of modulated signal
mod
P Signal power of the received right hand circular polarized wave
Rx,RHCP
P Signal power of the transmitted right hand circular polarized wave
Tx,RHCP
P Receiver sensitivity limit at the antenna connector of the receiver
sens
P Power level of received unwanted signal referred to a linear polarized antenna
u
P Signal power of wanted signal
w
RBW Resolution bandwidth
RMS Root mean square
V Amplitude of modulated output signal of RSU caused by data bit 1
max
V Amplitude of modulated output signal of RSU caused by data bit 0
min
α Tilt angle of test antenna
Wavelength
λ
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in EN 12253 [1], clause 4 and the following apply:
AT1 Attenuator 1
AT2 Attenuator 2
BER Bit Error Ratio
BST Beacon Service Table
CC Coaxial Circulator
CRC Cyclic Redundancy Checking
CW Continuous Wave
doa date of announcement
dop date of publication
dow date of withdrawal
DSRC Dedicated Short Range Communication
e.i.r.p. equivalent isotropically radiated power also called EIRP, eirp, E.I.R.P.
EC European Community
EFTA European Free Trade Association
EUT Equipment Under Test
FER Frame Error Ratio
ETSI
11 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
LHCP Left Hand Circular Polarized
M Centre point between phase centres of TTA and RTA
centre
MSS Monochromatic Signal Source used to measure the antenna decoupling
MSS1 Monochromatic Signal Source 1 used for generating the unwanted signal
n.a. not applicable
OBU On Board Unit
ORxA On Board Unit Receive Antenna
OTxA On Board Unit Transmit Antenna
PE Portable Equipment
PM Power Meter
-6
ppm parts per million (10 )
RBW Resolution BandWidth
RF Radio Frequency
RRxA RSU Receiving Antenna
RSA Receiving Substitution Antenna
RSU Road Side Unit
RTA Receiving Test Antenna
RTTT Road Transport and Traffic Telematics
RTxA RSU Transmitting Antenna
Rx Receiver
SA Spectrum Analyser
SR Special Report
TM1 Test Message 1
TS1 Test Signal 1
TS2 Test Signal 2
TSM Transmitter Spectrum Mask
TTA Transmitting Test Antenna
TTT Transport and Traffic Telematics
Tx Transmitter
VBW Video BandWidth
VST Vehicle Service Table
VSWR Voltage Standing Wave Ratio
XPD Cross-Polar Discrimination
4 Technical requirements specifications
4.1 Units
Transmitters and receivers may be individual or combined units; some units may be transmitter only, some units may be
receiver only, and some units may combine transmitter and receiver functionalities.
The antenna is always considered to be part of the EUT.
4.2 General characteristics
4.2.1 RSU classes
For the Transmitter Spectrum Mask (TSM) there are three classes of RSU transmitters which are distinguished by the
parameter D2 (point 4) "in band unwanted emissions with modulated carrier wave" of EN 12253 [1], clause 5.2, table 1.
Those TSM classes are called class A, class B and class C. Class A shall not be used.
To distinguish between RSUs built for different communication ranges, RSU receiver sensitivity classes are used. They
are called class 1, class 2, class 3 and class 4, and they are specified in table 6.
Receiver sensitivity class 1 is applicable for equipment intended to communicate at a distance shorter than 1 m with a
static OBU.
ETSI
12 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
Receiver sensitivity class 2 is applicable for an RSU mounted at medium height, communicating with an OBU moving
at medium speed.
Receiver sensitivity class 3 is applicable for an RSU mounted at heights above 5 m, communicating with an OBU at a
minimum of 4 m distance along the road moving at medium and high speed.
Receiver sensitivity class 4 is applicable for an RSU mounted at heights above 5 m, communicating with an OBU at a
minimum of 8 m distance along the road moving at high speed.
EXAMPLE 1: The receiver sensitivity class 1 is used in OBU programming stations.
EXAMPLE 2: The receiver sensitivity class 2 is used for access systems.
EXAMPLE 3: The receiver sensitivity classes 3 and 4 are used in tolling systems.
4.2.2 Carrier frequencies
The present document applies to RSUs operating in some or all of the channels detailed in table 1.
The centre frequencies f indicated in table 1 are referred to as parameter D1 in EN 12253 [1], clause 5.2, table 1.
Tx
Table 1: Frequency bands and centre frequencies f allocated for DSRC
Tx
Pan European Service Frequencies National Service Frequencies
Channel 1 5,795 GHz to 5,800 GHz, f = 5,7975 GHz
Tx
Channel 2 5,800 GHz to 5,805 GHz, f = 5,8025 GHz
Tx
Channel 3 5,805 GHz to 5,810 GHz, f = 5,8075 GHz
Tx
Channel 4 5,810 GHz to 5,815 GHz, f = 5,8125 GHz
Tx
NOTE: The corresponding receiver centre frequencies f are equivalent to the transmitter carrier frequencies f .
Rx Tx
4.2.3 Modulation
The carrier of frequency f , see table 1, shall be two level amplitude modulated with a modulation index m in the range
Tx
from 0,5 to 0,9 as defined in EN 12253 [1], clause 5.2, table 1 (parameters D6 and D6a). The modulation index is
defined in clause B.4 of annex B.
4.2.4 Antenna characteristic
All RSU antennas shall be LHCP with a Cross-Polar Discrimination (XPD) larger or equal to 15 dB in boresight and
larger or equal to 10 dB for a direction with 3 dB less antenna gain than in boresight, as defined in EN 12253 [1],
clause 5.2, table 1 (parameters D5 and D5a).
4.3 Testing for compliance with technical requirements
4.3.1 Environmental conditions for testing
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
operational environmental profile defined by its intended use, which, as a minimum, shall be that specified in the test
conditions contained in the present document.
Where 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.
ETSI
13 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
4.3.2 Environmental test conditions
4.3.2.1 General
All the tests shall be performed in both normal and extreme test conditions unless otherwise specified.
4.3.2.2 Normal test conditions
Normal temperature and humidity conditions for tests shall be any convenient combination of temperature and
humidity, within the following ranges:
• temperature: +15 ºC to +35 ºC
• relative humidity: 20 % to 75 %
4.3.2.3 Extreme test conditions
For tests at extreme temperatures, measurements shall be made at the lower and upper temperatures of -20 °C and
+55 °C.
Under extreme conditions the relative humidity is not applicable.
4.3.3 Power supply
The power supply for testing shall be able to provide the nominal supply voltage range under load as specified in the
RSU manual. All characteristics and essential requirements applying to RSUs shall be fulfilled with such a power
supply.
4.4 Conformance requirements
4.4.1 General requirements
For an RSU with a transmitter only, the transmitter requirements in clause 4.4.2 shall be applied.
For an RSU with a receiver only, the receiver requirements in clause 4.4.3 shall be applied.
For a combined RSU with a transmitter and a receiver, the transmitter requirements in clause 4.4.2 and the receiver
requirements in clause 4.4.3 shall be applied.
4.4.2 Transmitter requirements
4.4.2.1 Maximum equivalent isotropically radiated power
4.4.2.1.1 Definition
The maximum e.i.r.p. is the e.i.r.p. in the direction of maximal radiation of the RSU antenna (boresight).
The maximum e.i.r.p. is defined in EN 12253 [1], clause 5.2, table 1 (parameter D4).
4.4.2.1.2 Limit
For the operation in transmit mode (modulated carrier) and receive mode (unmodulated carrier), the maximum e.i.r.p.
shall not exceed the limit of 2 W.
4.4.2.1.3 Conformance
The conformance test for the e.i.r.p. limit is specified in clause 5.2.1.1.
ETSI
14 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
4.4.2.2 Transmitter frequency error
4.4.2.2.1 Definition
The relative frequency error Δf of the equipment is the difference between the frequency f at which the
RSU Tx,actual
transmitter outputs its largest carrier signal level in its unmodulated mode of operation and the corresponding nominal
listed in table 1 in relation to f :
carrier frequency f
Tx Tx
� ��
��,������ ��
∆� = (1)
���
�
��
The maximum relative frequency error is defined in EN 12253 [1], clause 5.2, table 1 (parameter D1).
4.4.2.2.2 Limit
| |
The absolute value of the relative frequency error, ∆� , shall not exceed 5 ppm.
���
4.4.2.2.3 Conformance
The conformance test for the transmitter frequency error is specified in clause 5.2.1.2.
4.4.2.3 Transmitter spectrum mask
4.4.2.3.1 Definition
The RSU Transmitter Spectrum Mask (TSM) defines the maximum e.i.r.p. allowed to be transmitted by the RSU within
specified frequency bands adjacent to the operation frequency, where distinction is made between different TSM classes
providing different values of limits, see clause 4.2.1.
NOTE: This e.i.r.p. depends on the power level of the transmitter output signal and reaches its maximum when
the radiated power level of this signal is set to its maximum.
The RSU TSM is defined in EN 12253 [1], clause 5.2, table 1 (parameter D2).
4.4.2.3.2 Limits
The limits for the TSM shall not exceed the values given in table 2. Those limits apply within an equivalent bandwidth
as indicated in table 2.
Figure 1 to figure 3 illustrate the essential frequency values from table 2. The conformance test is performed at the
frequencies marked with circles. The shape of the TSM is given by the equivalent measurement bandwith of 500
...

SLOVENSKI STANDARD
01-maj-2022
Transportna in prometna telematika (TTT) - Oddajniška oprema za enouporabniško
(osebno) komunikacijo kratkega dosega (DSRC) (s prenosnima hitrostma 500
kbit/s / 250 kbit/s), ki deluje v frekvenčnem pasu od 5795 MHz do 5815 MHz - 2. del:
Harmonizirani standard za dostop do radijskega spektra - 1. poddel: Obcestne
enote (RSU)
Transport and Traffic Telematics (TTT) - Dedicated Short Range Communication
(DSRC) transmission equipment (500 kbit/s / 250 kbit/s) operating in the 5 795 MHz to 5
815 MHz frequency band - Part 2: Harmonised Standard for access to radio spectrum -
Sub-part 1: Road Side Units (RSU)
Ta slovenski standard je istoveten z: ETSI EN 300 674-2-1 V3.1.1 (2022-03)
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONISED EUROPEAN STANDARD
Transport and Traffic Telematics (TTT);
Dedicated Short Range Communication (DSRC)
transmission equipment (500 kbit/s / 250 kbit/s)
operating in the 5 795 MHz to 5 815 MHz frequency band;
Part 2: Harmonised Standard for access to radio spectrum;
Sub-part 1: Road Side Units (RSU)

2 ETSI EN 300 674-2-1 V3.1.1 (2022-03)

Reference
REN/ERM-TG37-271
Keywords
data, DSRC, harmonised standard, radio,
regulation, RTTT, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2022.
All rights reserved.
ETSI
3 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 10
4 Technical requirements specifications . 11
4.1 Units . 11
4.2 General characteristics . 11
4.2.1 RSU classes . 11
4.2.2 Carrier frequencies . 12
4.2.3 Modulation . 12
4.2.4 Antenna characteristic . 12
4.3 Testing for compliance with technical requirements . 12
4.3.1 Environmental conditions for testing . 12
4.3.2 Environmental test conditions. 13
4.3.2.1 General . 13
4.3.2.2 Normal test conditions . 13
4.3.2.3 Extreme test conditions . 13
4.3.3 Power supply . 13
4.4 Conformance requirements . 13
4.4.1 General requirements . 13
4.4.2 Transmitter requirements . 13
4.4.2.1 Maximum equivalent isotropically radiated power . 13
4.4.2.1.1 Definition. 13
4.4.2.1.2 Limit . 13
4.4.2.1.3 Conformance . 13
4.4.2.2 Transmitter frequency error . 14
4.4.2.2.1 Definition. 14
4.4.2.2.2 Limit . 14
4.4.2.2.3 Conformance . 14
4.4.2.3 Transmitter spectrum mask . 14
4.4.2.3.1 Definition. 14
4.4.2.3.2 Limits . 14
4.4.2.3.3 Conformance . 16
4.4.2.4 Transmitter unwanted emissions . 16
4.4.2.4.1 Definition. 16
4.4.2.4.2 Limits . 16
4.4.2.4.3 Conformance . 16
4.4.3 Receiver requirements . 17
4.4.3.1 Receiver unwanted emissions . 17
4.4.3.1.1 Definition. 17
4.4.3.1.2 Limits . 17
4.4.3.1.3 Conformance . 17
4.4.3.2 Receiver selectivity . 17
4.4.3.2.1 Receiver blocking . 17
4.4.3.2.2 Receiver adjacent channel selectivity . 18
4.4.3.2.3 Receiver co-channel rejection . 18
4.4.3.3 Receiver dynamic range and sensitivity . 19
4.4.3.3.1 Receiver sensitivity . 19
ETSI
4 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
4.4.3.3.2 Receiver dynamic range . 19
5 Testing for compliance with technical requirements . 20
5.1 Environmental conditions for testing . 20
5.2 Radio test suites . 20
5.2.1 Transmitter parameter tests . 20
5.2.1.1 Maximum equivalent isotropically radiated power . 20
5.2.1.2 Transmitter frequency error . 21
5.2.1.3 Transmitter spectrum mask . 21
5.2.1.4 Transmitter unwanted emissions . 22
5.2.2 Receiver parameter tests . 23
5.2.2.1 Receiver unwanted emissions in the spurious domain . 23
5.2.2.2 Receiver selectivity . 24
5.2.2.2.1 General Requirements and prerequisites for testing . 24
5.2.2.2.2 Receiver blocking test execution . 24
5.2.2.2.3 Receiver adjacent channel selectivity test execution . 25
5.2.2.2.4 Receiver co-channel rejection test execution. 25
5.2.2.3 Receiver dynamic range and sensitivity test execution . 26
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 28
Annex B (normative): General condition for testing and test setup . 30
B.1 General conditions . 30
B.1.1 Power source . 30
B.1.2 Thermal balance . 30
B.1.3 Test signals . 31
B.1.4 Shielded anechoic chamber . 31
B.1.5 RF cables . 32
B.1.6 Splitter . 32
B.1.7 Spectrum analyser . 33
B.2 Conducted measurements . 33
B.2.1 Test site requirements . 33
B.2.2 Test arrangement for conducted Tx parameter measurements . 33
B.3 Radiated measurements . 34
B.3.1 Test site requirements . 34
B.3.1.1 Measurement distances . 34
B.3.1.2 Substitution method . 34
B.3.1.3 Test and substitution antennas . 35
B.3.2 Test arrangement for the radiated measurement of the transmit parameters . 35
B.3.3 Arrangement for radiated measurements of the receiver parameters . 36
B.3.4 Antenna decoupling loss . 39
B.4 RSU carrier modulation. 39
B.5 Bit error ratio measurements . 40
B.5.1 Basics . 40
B.5.2 BER measurement . 40
B.5.3 FER measurement . 40
B.5.3.1 Mathematical expressions . 40
B.5.3.2 Equipment . 41
B.5.3.3 Procedure . 41
Annex C (informative): Maximum Measurement Uncertainty . 42
Annex D (informative): Checklist . 43
Annex E (informative): Bibliography . 44
Annex F (informative): Change History . 45
History . 46

ETSI
5 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are 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 (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM).
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.4] to
provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation
of the laws of the Member States relating to the making available on the market of radio equipment and repealing
Directive 1999/5/EC [i.3].
Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present
document, a presumption of conformity with the corresponding essential requirements of that Directive and associated
EFTA regulations.
The present document complies with the Commission Implementing Decision (EU) 2019/1345 [i.1] and CEPT/ERC
Recommendation 70-03 [i.2].
The present document is part 2, sub-part 1 of a multi-part deliverable covering Transport and Traffic Telematics (TTT);
Dedicated Short Range Communication (DSRC) transmission equipment (500 kbit/s / 250 kbit/s) operating in the
5 795 MHz to 5 815 MHz frequency band, as identified below:
Part 1: "General characteristics and test methods for Road Side Units (RSU) and On-Board Units (OBU)";
Part 2: "Harmonised Standard for access to radio spectrum";
Sub-part 1: "Road Side Units (RSU)";
Sub-part 2: "On-Board Units (OBU)".

ETSI
6 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
National transposition dates
Date of adoption of this EN: 24 January 2022
Date of latest announcement of this EN (doa): 30 April 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 October 2022
Date of withdrawal of any conflicting National Standard (dow): 31 October 2023

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
7 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
1 Scope
The present document specifies technical characteristics and methods of measurements for Transport and Traffic
Telematics (TTT) systems intended to be operated as Road Side Units (RSU) with the following characteristics:
• with a Radio Frequency (RF) connection and specified antenna or with an integral antenna;
• used for data transmission only;
• operating in the 5 795 MHz to 5 815 MHz frequency band (see also table 1).
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.3] is given in annex A.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] EN 12253:2004: "Road transport and traffic telematics - Dedicated short-range communication -
Physical layer using microwave at 5,8 GHz", (produced by CEN).
[2] ISO 14906:2018/AMD 1:2020: "Electronic fee collection -- Application interface definition for
dedicated short-range communication -- Amendment 1".
[3] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document, but they assist the
user with regard to a particular subject area.
[i.1] Commission Implementing Decision (EU) 2019/1345 of 2 August 2019 amending Decision
2006/771/EC updating harmonised technical conditions in the area of radio spectrum use for
short-range devices.
[i.2] CEPT/ERC Recommendation 70-03 (2020): "Relating to the use of Short Range Devices (SRD)".
[i.3] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
ETSI
8 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
[i.4] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request
to the European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.5] ETSI EG 203 336 (V1.2.1) (05-2020): "Guide for the selection of technical parameters for the
production of Harmonised Standards covering article 3.1(b) and article 3.2 of Directive
2014/53/EU".
[i.6] CEPT/ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in Directive 2014/53/EU [i.3] and the following apply:
adjacent channel: channel at a distance of 5 MHz relative to the centre frequency, i.e. in the channel at the next upper
or lower centre frequency
bit: acronym for "binary digit" which can have one out of two possible values
EXAMPLE: 0/1, or +1/-1, or low/high.
bit rate: number of bits occurring per unit time, usually expressed in bits per second
boresight: direction of maximum radiation of a directional antenna
carrier frequency: frequency f to which the RSU transmitter is tuned
Tx
carrier signal or carrier: harmonic signal whose nominal single frequency f is capable of being modulated by a
Tx
second, symbol-carrying signal
channel: continuous part of the radio-frequency spectrum to be used for a specified emission or transmission
NOTE: A radio-frequency channel may be defined by two specified limits, or by its centre frequency and its
bandwidth, or any equivalent indication. It is often designated by a sequential number. A radio-frequency
channel may be time-shared in order to allow radio communication in both directions by simplex
operation. The term "channel" is sometimes used to denote two associated radio-frequency channels, each
of which is used for one of two directions of transmission, i.e. in fact a telecommunication circuit.
co-channel: transmission using the same uplink or downlink channel in a frequency band of 5 MHz width
Cross-Polar Discrimination (XPD): ratio P / P of power P of the received left hand circular
Rx,LHCP Rx,RHCP Rx,LHCP
polarized wave to the power P of the received right hand circular wave when the power of the transmitted
Rx,RHCP
waves P is equal to P
Tx,LHCP Tx,RHCP
downlink: transmission in direction from RSU to OBU
environmental profile: range of environmental conditions under which equipment within the scope of the present
document is required to comply with the provisions of the present document
equivalent bandwidth: bandwidth equivalent to the bandwidth of a frequency selective power measurement
equivalent isotropically radiated power (e.i.r.p.): signal power fed into an ideal loss-less antenna radiating equally in
all directions that generates the same power flux at a reference distance as the one generated by a signal fed into the
antenna under consideration in a predefined direction within its far field region
integral antenna: antenna, with or without a connector, designed as an indispensable part of the equipment
monochromatic signal: sinusoidal signal with fixed frequency
ETSI
9 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
operating frequency: nominal frequency at which equipment is operated
NOTE 1: Also referred to as the operating centre frequency.
NOTE 2: Equipment may be able to operate at more than one operating frequency.
out-of-band emissions: emissions on a frequency or frequencies immediately outside the necessary bandwidth which
results from the modulation process and which cannot be reduced without affecting the corresponding transmission of
information, excluding spurious emissions
polarization: locus of the tip of the electrical field vector in a plane perpendicular to the direction of transmission
EXAMPLE: Horizontal and vertical linear polarization.
Left- and right-hand circular polarization.
Portable Equipment (PE): generally intended to be self-contained, free standing and portable
NOTE: A PE would normally consist of a single module, but it may consist of several interconnected modules. It
is powered by one or more internal batteries.
radiated measurements: measurements where the coupling to the EUT is obtained by radiation
receive mode: mode, in which the device receives a backscattered signal from an OBU while the device is transmitting
at the same time an unmodulated carrier to the OBU
Road Side Unit (RSU): equipment that can communicate with an on board unit
spurious emissions: emissions on a frequency, or frequencies, which are outside an exclusion band of ±2,5 times the
channel spacing around the selected centre frequency f , at a level which may be reduced without affecting the
Tx
corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products but exclude out-of-band emissions.
stand-by mode: mode, in which the device may receive DSRC signals, but is never transmitting
transmit mode: mode, in which the device transmits a modulated carrier
unwanted emissions: spurious emissions and out-of-band emissions
uplink: transmission in direction from OBU to RSU
3.2 Symbols
For the purposes of the present document, the following symbols apply:
A Amplitude of CW signal
CW
Amplitude of modulated signal
A
mod
ATN Attenuation of balun
BLN
BER Bit Error Ratio
C Number of frames transmitted
F
C Number of erroneous frames received
E
d Distance between phase centres of transmitting and receiving antenna
d Horizontal displacement of TTA and RTA antenna phase centres
displace
D Directivity relative to an isotropic radiator
i
D Largest linear dimension of test antenna
0,TA
D Largest linear dimension of EUT antenna
0,EUT
EIRP Maximum e.i.r.p. of RSU
max
Δf Relative frequency error of RSU
RSU
ΔP Dynamic range limit
drl
f Frequency
ETSI
10 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
FER Frame error ratio
f Nominal RSU receiver centre frequency
Rx
f Highest operational RSU receiver centre frequency
Rx hi
f Lowest operational RSU receiver centre frequency
Rx lo
f Nominal OBU sub-carrier frequency
s
Nominal RSU carrier frequency
f
Tx
f Actual centre frequency of the downlink carrier
Tx,actual
f Nominal centre frequency of unwanted signal
u
G Gain of receiving substitution antenna
RSA
G Gain of receiving test antenna
RTA
G Gain of RSU transmitting antenna
RTxA
lg(.) Logarithm to the base ten
m Modulation index
N Total number of transmitted bits within a single frame
P Receiver adjacent channel selectivity
acsl
P Receiver blocking capability
bl
Co-channel rejection limit
P
cocr
P Power of CW signal
CW
P Signal power of the received left hand circular polarized wave
Rx,LHCP
P Signal power of the transmitted left hand circular polarized wave
Tx,LHCP
-6
P Maximum receiver input power value for BER ≤ 10
max
-6
P Minimum receiver input power value for BER ≤ 10
min
P Power of modulated signal
mod
P Signal power of the received right hand circular polarized wave
Rx,RHCP
P Signal power of the transmitted right hand circular polarized wave
Tx,RHCP
P Receiver sensitivity limit at the antenna connector of the receiver
sens
P Power level of received unwanted signal referred to a linear polarized antenna
u
P Signal power of wanted signal
w
RBW Resolution bandwidth
RMS Root mean square
V Amplitude of modulated output signal of RSU caused by data bit 1
max
V Amplitude of modulated output signal of RSU caused by data bit 0
min
α Tilt angle of test antenna
Wavelength
λ
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in EN 12253 [1], clause 4 and the following apply:
AT1 Attenuator 1
AT2 Attenuator 2
BER Bit Error Ratio
BST Beacon Service Table
CC Coaxial Circulator
CRC Cyclic Redundancy Checking
CW Continuous Wave
doa date of announcement
dop date of publication
dow date of withdrawal
DSRC Dedicated Short Range Communication
e.i.r.p. equivalent isotropically radiated power also called EIRP, eirp, E.I.R.P.
EC European Community
EFTA European Free Trade Association
EUT Equipment Under Test
FER Frame Error Ratio
ETSI
11 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
LHCP Left Hand Circular Polarized
M Centre point between phase centres of TTA and RTA
centre
MSS Monochromatic Signal Source used to measure the antenna decoupling
MSS1 Monochromatic Signal Source 1 used for generating the unwanted signal
n.a. not applicable
OBU On Board Unit
ORxA On Board Unit Receive Antenna
OTxA On Board Unit Transmit Antenna
PE Portable Equipment
PM Power Meter
-6
ppm parts per million (10 )
RBW Resolution BandWidth
RF Radio Frequency
RRxA RSU Receiving Antenna
RSA Receiving Substitution Antenna
RSU Road Side Unit
RTA Receiving Test Antenna
RTTT Road Transport and Traffic Telematics
RTxA RSU Transmitting Antenna
Rx Receiver
SA Spectrum Analyser
SR Special Report
TM1 Test Message 1
TS1 Test Signal 1
TS2 Test Signal 2
TSM Transmitter Spectrum Mask
TTA Transmitting Test Antenna
TTT Transport and Traffic Telematics
Tx Transmitter
VBW Video BandWidth
VST Vehicle Service Table
VSWR Voltage Standing Wave Ratio
XPD Cross-Polar Discrimination
4 Technical requirements specifications
4.1 Units
Transmitters and receivers may be individual or combined units; some units may be transmitter only, some units may be
receiver only, and some units may combine transmitter and receiver functionalities.
The antenna is always considered to be part of the EUT.
4.2 General characteristics
4.2.1 RSU classes
For the Transmitter Spectrum Mask (TSM) there are three classes of RSU transmitters which are distinguished by the
parameter D2 (point 4) "in band unwanted emissions with modulated carrier wave" of EN 12253 [1], clause 5.2, table 1.
Those TSM classes are called class A, class B and class C. Class A shall not be used.
To distinguish between RSUs built for different communication ranges, RSU receiver sensitivity classes are used. They
are called class 1, class 2, class 3 and class 4, and they are specified in table 6.
Receiver sensitivity class 1 is applicable for equipment intended to communicate at a distance shorter than 1 m with a
static OBU.
ETSI
12 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
Receiver sensitivity class 2 is applicable for an RSU mounted at medium height, communicating with an OBU moving
at medium speed.
Receiver sensitivity class 3 is applicable for an RSU mounted at heights above 5 m, communicating with an OBU at a
minimum of 4 m distance along the road moving at medium and high speed.
Receiver sensitivity class 4 is applicable for an RSU mounted at heights above 5 m, communicating with an OBU at a
minimum of 8 m distance along the road moving at high speed.
EXAMPLE 1: The receiver sensitivity class 1 is used in OBU programming stations.
EXAMPLE 2: The receiver sensitivity class 2 is used for access systems.
EXAMPLE 3: The receiver sensitivity classes 3 and 4 are used in tolling systems.
4.2.2 Carrier frequencies
The present document applies to RSUs operating in some or all of the channels detailed in table 1.
The centre frequencies f indicated in table 1 are referred to as parameter D1 in EN 12253 [1], clause 5.2, table 1.
Tx
Table 1: Frequency bands and centre frequencies f allocated for DSRC
Tx
Pan European Service Frequencies National Service Frequencies
Channel 1 5,795 GHz to 5,800 GHz, f = 5,7975 GHz
Tx
Channel 2 5,800 GHz to 5,805 GHz, f = 5,8025 GHz
Tx
Channel 3 5,805 GHz to 5,810 GHz, f = 5,8075 GHz
Tx
Channel 4 5,810 GHz to 5,815 GHz, f = 5,8125 GHz
Tx
NOTE: The corresponding receiver centre frequencies f are equivalent to the transmitter carrier frequencies f .
Rx Tx
4.2.3 Modulation
The carrier of frequency f , see table 1, shall be two level amplitude modulated with a modulation index m in the range
Tx
from 0,5 to 0,9 as defined in EN 12253 [1], clause 5.2, table 1 (parameters D6 and D6a). The modulation index is
defined in clause B.4 of annex B.
4.2.4 Antenna characteristic
All RSU antennas shall be LHCP with a Cross-Polar Discrimination (XPD) larger or equal to 15 dB in boresight and
larger or equal to 10 dB for a direction with 3 dB less antenna gain than in boresight, as defined in EN 12253 [1],
clause 5.2, table 1 (parameters D5 and D5a).
4.3 Testing for compliance with technical requirements
4.3.1 Environmental conditions for testing
Tests defined in the present document shall be carried out at representative points within the boundary limits of the
operational environmental profile defined by its intended use, which, as a minimum, shall be that specified in the test
conditions contained in the present document.
Where 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.
ETSI
13 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
4.3.2 Environmental test conditions
4.3.2.1 General
All the tests shall be performed in both normal and extreme test conditions unless otherwise specified.
4.3.2.2 Normal test conditions
Normal temperature and humidity conditions for tests shall be any convenient combination of temperature and
humidity, within the following ranges:
• temperature: +15 ºC to +35 ºC
• relative humidity: 20 % to 75 %
4.3.2.3 Extreme test conditions
For tests at extreme temperatures, measurements shall be made at the lower and upper temperatures of -20 °C and
+55 °C.
Under extreme conditions the relative humidity is not applicable.
4.3.3 Power supply
The power supply for testing shall be able to provide the nominal supply voltage range under load as specified in the
RSU manual. All characteristics and essential requirements applying to RSUs shall be fulfilled with such a power
supply.
4.4 Conformance requirements
4.4.1 General requirements
For an RSU with a transmitter only, the transmitter requirements in clause 4.4.2 shall be applied.
For an RSU with a receiver only, the receiver requirements in clause 4.4.3 shall be applied.
For a combined RSU with a transmitter and a receiver, the transmitter requirements in clause 4.4.2 and the receiver
requirements in clause 4.4.3 shall be applied.
4.4.2 Transmitter requirements
4.4.2.1 Maximum equivalent isotropically radiated power
4.4.2.1.1 Definition
The maximum e.i.r.p. is the e.i.r.p. in the direction of maximal radiation of the RSU antenna (boresight).
The maximum e.i.r.p. is defined in EN 12253 [1], clause 5.2, table 1 (parameter D4).
4.4.2.1.2 Limit
For the operation in transmit mode (modulated carrier) and receive mode (unmodulated carrier), the maximum e.i.r.p.
shall not exceed the limit of 2 W.
4.4.2.1.3 Conformance
The conformance test for the e.i.r.p. limit is specified in clause 5.2.1.1.
ETSI
14 ETSI EN 300 674-2-1 V3.1.1 (2022-03)
4.4.2.2 Transm
...