SIST EN 301 893 V1.3.1:2006
(Main)Broadband Radio Access Networks (BRAN); 5 GHz high performance RLAN; Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive
Broadband Radio Access Networks (BRAN); 5 GHz high performance RLAN; Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive
The present document is intended to cover the provisions of article 3.2 of R&TTE Directive [1], 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 [1] will apply to equipment within the scope of the present document.
NOTE 2: A list of such ENs is included on the web site http://www.newapproach.org
Širokopasovna radijska dostopovna omrežja (BRAN) – Zelo zmogljivo radijsko lokalno omrežje (RLAN) na 5 GHz – Harmonizirani evropski standard (EN), ki zajema bistvene zahteve člena 3.2 direktive R&TTE
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2006
âLURNRSDVRYQDUDGLMVNDGRVWRSRYQDRPUHåMD %5$1 ±=HOR]PRJOMLYRUDGLMVNR
ORNDOQRRPUHåMH 5/$1 QD*+]±+DUPRQL]LUDQLHYURSVNLVWDQGDUG (1 NL
]DMHPDELVWYHQH]DKWHYHþOHQDGLUHNWLYH5 77(
Broadband Radio Access Networks (BRAN); 5 GHz high performance RLAN;
Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive
Ta slovenski standard je istoveten z: EN 301 893 Version 1.3.1
ICS:
33.060.01 Radijske komunikacije na Radiocommunications in
splošno general
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
Candidate Harmonized European Standard (Telecommunications series)
Broadband Radio Access Networks (BRAN);
5 GHz high performance RLAN;
Harmonized EN covering essential requirements
of article 3.2 of the R&TTE Directive
2 ETSI EN 301 893 V1.3.1 (2005-08)
Reference
REN/BRAN-0020002-2R1
Keywords
access, broadband, HIPERLAN, LAN, layer 1,
radio, testing
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ETSI
3 ETSI EN 301 893 V1.3.1 (2005-08)
Contents
Intellectual Property Rights.6
Foreword.6
Introduction .7
1 Scope.9
2 References.10
3 Definitions, symbols and abbreviations .10
3.1 Definitions.10
3.2 Symbols.12
3.3 Abbreviations.12
4 Technical requirements specifications.12
4.1 Environmental profile.12
4.2 Carrier frequencies.13
4.2.1 Definition.13
4.2.2 Limits.13
4.2.3 Conformance.13
4.3 RF output power, Transmit Power Control (TPC) and power density .13
4.3.1 Definitions.13
4.3.1.1 RF output power.13
4.3.1.2 Transmit Power Control (TPC).13
4.3.1.3 Power density.13
4.3.2 Limits.13
4.3.2.1 RF output power and power density at the highest power level.13
4.3.2.2 RF output power at the lowest power level of the TPC range.14
4.3.3 Conformance.14
4.4 Transmitter unwanted emissions .14
4.4.1 Transmitter unwanted emissions outside the 5 GHz RLAN bands.14
4.4.1.1 Definition.14
4.4.1.2 Limits.14
4.4.1.3 Conformance.14
4.4.2 Transmitter unwanted emissions within the 5 GHz RLAN bands .14
4.4.2.1 Definition.14
4.4.2.2 Limits.15
4.4.2.3 Conformance.15
4.5 Receiver spurious emissions.15
4.5.1 Definition.15
4.5.2 Limits.15
4.5.3 Conformance.15
4.6 Dynamic Frequency Selection (DFS).16
4.6.1 Introduction.16
4.6.1.1 Operational modes.16
4.6.1.2 DFS operation.16
4.6.2 DFS technical requirements specifications .17
4.6.2.1 Channel Availability Check.17
4.6.2.1.1 Definition.17
4.6.2.1.2 Limit.17
4.6.2.1.3 Conformance.17
4.6.2.2 In-Service Monitoring.18
4.6.2.2.1 Definition.18
4.6.2.2.2 Limit.18
4.6.2.2.3 Conformance.18
4.6.2.3 Channel Shutdown.18
4.6.2.3.1 Definition.18
4.6.2.3.2 Limit.18
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4 ETSI EN 301 893 V1.3.1 (2005-08)
4.6.2.3.3 Conformance.18
4.6.2.4 Non-Occupancy Period.18
4.6.2.4.1 Definition.18
4.6.2.4.2 Limit.19
4.6.2.4.3 Conformance.19
4.6.2.5 Uniform Spreading.19
4.6.2.5.1 Definition.19
4.6.2.5.2 Limit.19
5 Testing for compliance with technical requirements.19
5.1 Conditions for testing .19
5.1.1 Normal and extreme test conditions.19
5.1.2 Test sequences and traffic load.19
5.1.2.1 General test transmission sequences .19
5.1.2.2 Test transmission sequences for DFS tests.20
5.1.3 Test frequencies.20
5.1.4 Presentation of equipment .20
5.1.4.1 Integrated and dedicated antennas.20
5.1.4.2 Testing of host connected equipment and plug-in radio devices.20
5.1.4.2.1 The use of a host or test jig for testing plug-in radio devices .20
5.1.4.2.2 Testing of combinations .21
5.2 Interpretation of the measurement results .22
5.3 Essential radio test suites.22
5.3.1 Product information.22
5.3.2 Carrier frequencies.23
5.3.2.1 Test conditions.23
5.3.2.2 Test methods.23
5.3.2.2.1 Conducted measurement.23
5.3.2.2.2 Radiated measurement.24
5.3.3 RF output power, Transmit Power Control (TPC) and power density.24
5.3.3.1 Test conditions.24
5.3.3.2 Test method.24
5.3.3.2.1 Conducted measurement.24
5.3.3.2.2 Radiated measurement.27
5.3.4 Transmitter unwanted emissions outside the 5 GHz RLAN bands.27
5.3.4.1 Test conditions.27
5.3.4.2 Test method.27
5.3.4.2.1 Conducted measurement.27
5.3.4.2.2 Radiated measurement.28
5.3.5 Transmitter unwanted emissions within the 5 GHz RLAN bands .29
5.3.5.1 Test conditions.29
5.3.5.2 Test method.29
5.3.5.2.1 Conducted measurement.29
5.3.5.2.2 Radiated measurement.30
5.3.6 Receiver spurious emissions.30
5.3.6.1 Test conditions.30
5.3.6.2 Test method.30
5.3.6.2.1 Conducted measurement.30
5.3.6.2.2 Radiated measurement.30
5.3.7 Dynamic Frequency Selection (DFS) .31
5.3.7.1 Test conditions.31
5.3.7.1.1 Selection of radar test signals .31
5.3.7.1.2 Test set-ups.31
5.3.7.2 Test Method.32
5.3.7.2.1 Conducted measurement.32
5.3.7.2.2 Radiated measurement.37
Annex A (normative): The EN Requirements Table (EN-RT) .38
Annex B (normative): Test sites and arrangements for radiated measurements.39
B.1 Test sites.39
B.1.1 Open air test sites .39
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5 ETSI EN 301 893 V1.3.1 (2005-08)
B.1.2 Anechoic chamber.40
B.1.2.1 General.40
B.1.2.2 Description.40
B.1.2.3 Influence of parasitic reflections.40
B.1.2.4 Calibration and mode of use .41
B.2 Test antenna.42
B.3 Substitution antenna.43
Annex C (normative): General description of measurement .44
C.1 Conducted measurements.44
C.2 Radiated measurements.44
C.3 Substitution measurement.45
Annex D (normative): DFS parameters .46
Annex E (informative): The EN title in the official languages .48
Annex F (informative): Bibliography.49
History .50
ETSI
6 ETSI EN 301 893 V1.3.1 (2005-08)
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 Candidate Harmonized European Standard (Telecommunications series) has been produced by ETSI Project
Broadband Radio Access Networks (BRAN).
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC (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 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") [1].
Technical specifications relevant to Directive 1999/5/EC are given in annex A.
National transposition dates
Date of adoption of this EN: 29 July 2005
Date of latest announcement of this EN (doa): 31 October 2005
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 April 2006
Date of withdrawal of any conflicting National Standard (dow): 30 April 2007
ETSI
7 ETSI EN 301 893 V1.3.1 (2005-08)
Introduction
The present document is part of a set of standards designed to fit in a modular structure to cover all radio and
telecommunications terminal equipment under the R&TTE Directive [1]. Each standard is a module in the structure.
The modular structure is shown in figure 1.
Disability*
3.3f
Emergency*
3.3e
Fraud*
3.3d
3.3c
Privacy*
No harm to the network*
3.3b
* If needed
Scoped by
Interworking via the network*
equipment
3.3a class or type
Interworking with the network
Use of spectrum
3.2
New radio harmonized standards
Spectrum
Scoped by frequency and/or equipment type
Radio Product EMC
EN 301 489 multi-part EMC standard
3.1b
EMC
Generic and product standards also notified under EMC Directive
- If needed, new standards for human exposure to
Electromagnetic Fields,
- if needed, new standards for acoustic safety
3.1a
Standards also notified under LV Directive
Safety
Non-radio Radio (RE)
TTE Non-TTE
Figure 1: Modular structure for the various standards used under the R&TTE Directive [1]
ETSI
8 ETSI EN 301 893 V1.3.1 (2005-08)
The left hand edge of the figure 1 shows the different clauses of article 3 of the R&TTE Directive [1].
For article 3.3 various horizontal boxes are shown. Dotted lines indicate that at the time of publication of the present
document essential requirements in these areas have to be adopted by the Commission. If such essential requirements
are adopted, and as far and as long as they are applicable, they will justify individual standards whose scope is likely to
be specified by function or interface type.
The vertical boxes show the standards under article 3.2 for the use of the radio spectrum by radio equipment. The
scopes of these standards are specified either by frequency (normally in the case where frequency bands are
harmonized) or by radio equipment type.
For article 3.1b the diagram shows EN 301 489 [8], the multi-part product EMC standard for radio used under the
EMC Directive [2].
For article 3.1a the diagram shows the existing safety standards currently used under the LV Directive [3] and new
standards covering human exposure to electromagnetic fields. New standards covering acoustic safety may also be
required.
The bottom of the figure shows the relationship of the standards to radio equipment and telecommunications terminal
equipment. A particular equipment may be radio equipment, telecommunications terminal equipment or both. A radio
spectrum standard will apply if it is radio equipment. An article 3.3 standard will apply as well only if the relevant
essential requirement under the R&TTE Directive [1] is adopted by the Commission and if the equipment in question is
covered by the scope of the corresponding standard. Thus, depending on the nature of the equipment, the essential
requirements under the R&TTE Directive [1] may be covered in a set of standards.
The modularity principle has been taken because:
• It minimizes the number of standards needed. Because equipment may, in fact, have multiple interfaces and
functions it is not practicable to produce a single standard for each possible combination of functions that may
occur in an equipment.
• It provides scope for standards to be added:
- under article 3.2 when new frequency bands are agreed; or
- under article 3.3 should the Commission take the necessary decisions
without requiring alteration of standards that are already published.
• It clarifies, simplifies and promotes the usage of Harmonized Standards as the relevant means of conformity
assessment.
ETSI
9 ETSI EN 301 893 V1.3.1 (2005-08)
1 Scope
The present document applies to 5 GHz high performance RLAN equipment that is intended to operate in the frequency
ranges 5 150 MHz to 5 350 MHz and 5 470 MHz to 5 725 MHz on any of the carrier frequencies as per table 1. Specific
requirements are described for (equipment having the capability of) avoiding occupied channels by employing a
Dynamic Frequency Selection (DFS) mechanism and implementing Transmit Power Control (TPC), as required in
ECC/DEC(04)08 [7].
NOTE 1: This mechanism is also required and described in ITU-R Recommendation M.1652 (see bibliography).
Table 1: Nominal carrier frequency allocations
Carrier centre frequency f
c
5 180 MHz
5 200 MHz
5 220 MHz
5 240 MHz
5 260 MHz
5 280 MHz
5 300 MHz
5 320 MHz
5 500 MHz
5 520 MHz
5 540 MHz
5 560 MHz
5 580 MHz
5 600 MHz
5 620 MHz
5 640 MHz
5 660 MHz
5 680 MHz
5 700 MHz
The present document is intended to cover the provisions of article 3.2 of R&TTE Directive [1], 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 [1] will apply to equipment within the scope of the present
document.
NOTE 2: A list of such ENs is included on the web site http://www.newapproach.org.
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10 ETSI EN 301 893 V1.3.1 (2005-08)
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• 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.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
[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).
[2] Council Directive 89/336/EEC of 3 May 1989 on the approximation of the laws of the Member
States relating to electromagnetic compatibility (EMC Directive).
[3] Council Directive 73/23/EEC of 19 February 1973 on the harmonization of the laws of Member
States relating to electrical equipment designed for use within certain voltage limits (LV
Directive).
[4] ETSI TR 100 028-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics; Part 1".
[5] ETSI TR 100 028-2: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics; Part 2".
[6] CISPR 16-1: "Specification for radio disturbance and immunity measuring apparatus and
methods - Part 1: Radio disturbance and immunity measuring apparatus".
[7] ECC/DEC(04)08: "ECC Decision of 12 November 2004 on the harmonised use of the 5 GHz
frequency bands for the implementation of Wireless Access Systems including Radio Local Area
Networks (WAS/RLANs)".
[8] ETSI EN 301 489: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
ElectroMagnetic Compatibility (EMC) standard for radio equipment and services".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in the R&TTE Directive [1] and the following
apply:
5 GHz RLAN bands: total frequency range that consists of 2 sub-bands:
• 5 150 MHz to 5 350 MHz; and
• 5 470 MHz to 5 725 MHz.
ad-hoc mode: operating mode in which an RLAN device establishes a temporary wireless connection with other RLAN
devices without a controlling network infrastructure
Available Channel: channel identified as available for use as an Operating Channel without having to perform a
Channel Availability Check first
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11 ETSI EN 301 893 V1.3.1 (2005-08)
burst: period during which radio waves are intentionally transmitted, preceded and succeeded by periods during which
no intentional transmission is made
channel: amount of spectrum used by a single RLAN device operating on one of the carrier frequencies listed in table 1
of EN 301 893
combined equipment: any combination of non-radio equipment that requires a plug-in radio device to offer full
functionality
environmental profile: range of environmental conditions under which equipment within the scope of EN 301 893 is
required to comply with the provisions of EN 301 893
host equipment: any equipment which has complete user functionality when not connected to the radio equipment part
and to which the radio equipment part provides additional functionality and to which connection is necessary for the
radio equipment part to offer functionality
master mode: mode which relates to the DFS functionality where the RLAN device uses a Radar Interference
Detection function and controls the transmissions of RLAN devices operating in slave mode
NOTE: In this mode it is able to select a channel and initiate a network by sending enabling signals to other
RLAN devices. An RLAN network shall always have at least one RLAN device operating in master mode
when operating in the bands 5 250 MHz to 5 350 MHz and 5 470 MHz to 5 725 MHz.
multi-radio equipment: radio, host or combined equipment using more than one radio transceiver
Operating Channel: Available Channel on which the RLAN has started transmissions. An Operating Channel
becomes again an Available Channel if the RLAN stopped all transmissions on that channel and no radar signal was
detected by the In-Service Monitoring
plug-in radio device: radio equipment module intended to be used with or within host, combined or multi-radio
equipment, using their control functions and power supply
simulated radar burst: series of periodic radio wave pulses for test purposes
slave mode: mode which relates to the DFS functionality where the transmissions of the RLAN are under control of a
RLAN device operating in master mode
NOTE: An RLAN device in slave mode may use a Radar Interference Detection function.
stand-alone radio equipment: equipment that is intended primarily as communications equipment and that is normally
used on a stand-alone basis
Transmit Power Control (TPC): technique in which the transmitter output power is controlled resulting in reduced
interference to other systems
Unavailable Channel: channel which can not be considered by the RLAN for a certain period of time
(Non-Occupancy Period) after a radar signal was detected on that channel
Usable Channel: any channel from table 1 of EN 301 893, which can be considered by the RLAN for possible use,
unless it is precluded by either:
1) the intended outdoor usage of the RLAN; or
2) previous detection of a radar on the channel (Unavailable Channel); or
3) national regulations; or
4) the restriction to only operate in the band 5 150 MHz to 5 250 MHz for RLAN devices without a radar
detection capability.
ETSI
12 ETSI EN 301 893 V1.3.1 (2005-08)
3.2 Symbols
For the purposes of the present document, the following symbols apply:
A Measured power output (dBm)
B Radar burst period
Ch Channel free from radars
f
Ch Channel occupied by a radar
r
D Measured power density
E Field strength
E Reference field strength
o
f Carrier frequency
c
G Antenna gain (dBi)
L Radar burst length
n Number of channels
P Calculated EIRP at highest power level
H
P Calculated EIRP at lowest power level
L
PD Calculated power density
R Distance
R Reference distance
o
S0 Signal power
T0 Time instant
T1 Time instant
T2 Time instant
T3 Time instant
W Radar pulse width
x Observed duty cycle
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
DFS Dynamic Frequency Selection
EIRP Equivalent Isotropically Radiated Power
EMC ElectroMagnetic Compatibility
ERP Effective Radiated Power
LV Low Voltage
ppm parts per million
PRF Pulse Repetition Frequency
R&TTE Radio and Telecommunications Terminal Equipment
TPC Transmit Power Control
Tx Transmit, Transmitter
UUT Unit Under Test
4 Technical requirements specifications
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be stated by the manufacturer. The equipment shall comply with all the technical requirements
of the present document at all times when operating within the boundary limits of the stated operational environmental
profile.
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13 ETSI EN 301 893 V1.3.1 (2005-08)
4.2 Carrier frequencies
4.2.1 Definition
The equipment is required to operate on the applicable specific carrier centre frequencies that correspond to the nominal
carrier frequencies f defined in table 1.
c
4.2.2 Limits
The actual carrier centre frequency for any given channel given in table 1 shall be maintained within the range
f ± 20 ppm.
c
4.2.3 Conformance
Conformance tests as defined in clause 5.3.2 shall be carried out.
4.3 RF output power, Transmit Power Control (TPC) and power
density
4.3.1 Definitions
4.3.1.1 RF output power
The RF output power is the mean equivalent isotropically radiated power (EIRP) during a transmission burst.
4.3.1.2 Transmit Power Control (TPC)
Transmit Power Control (TPC) is a mechanism to be used by the UUT to ensure a mitigation factor of at least 3 dB on
the aggregate power from a large number of devices. This requires the UUT to have a TPC range from which the lowest
value is at least 6 dB below the values for mean EIRP given in table 2. TPC is not required in the band 5 150 MHz to
5 250 MHz.
4.3.1.3 Power density
The power density is the mean Equivalent Isotropically Radiated Power (EIRP) density during a transmission burst.
4.3.2 Limits
4.3.2.1 RF output power and power density at the highest power level
For devices with TPC, the RF output power and the power density when configured to operate at the highest stated
power level of the TPC range shall not exceed the levels given in table 2.
For devices without TPC, the limits in table 2 shall be reduced by 3 dB, except when operating in the band 5 150 MHz
to 5 250 MHz.
Table 2: Mean EIRP limits for RF output power and power density at the highest power level
Frequency range Mean EIRP limit Mean EIRP density limit
5 150 MHz to 5 350 MHz 23 dBm 10 dBm/MHz
5 470 MHz to 5 725 MHz 30 dBm 17 dBm/MHz
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14 ETSI EN 301 893 V1.3.1 (2005-08)
4.3.2.2 RF output power at the lowest power level of the TPC range
For devices using TPC, the RF output power during a transmission burst when configured to operate at the lowest stated
power level of the TPC range shall not exceed the levels given in table 3.
Table 3: Mean EIRP limits for RF output power at the lowest power level of the TPC range
Frequency range Mean EIRP
5 250 MHz to 5 350 MHz 17 dBm
5 470 MHz to 5 725 MHz 24 dBm
The limits in table 3 do not apply for devices without TPC or when operating in the band 5 150 MHz to 5 250 MHz.
4.3.3 Conformance
Conformance tests as defined in clause 5.3.3 shall be carried out.
4.4 Transmitter unwanted emissions
4.4.1 Transmitter unwanted emissions outside the 5 GHz RLAN bands
4.4.1.1 Definition
These are radio frequency emissions outside the 5 GHz RLAN bands.
4.4.1.2 Limits
The level of unwanted emission shall not exceed the limits given in table 4.
Table 4: Transmitter unwanted emission limits outside the 5 GHz RLAN bands
Frequency range Maximum power, Bandwidth
ERP
30 MHz to 47 MHz -36 dBm 100 kHz
47 MHz to 74 MHz -54 dBm 100 kHz
74 MHz to 87,5 MHz -36 dBm 100 kHz
87,5 MHz to 118 MHz -54 dBm 100 kHz
118 MHz to 174 MHz -36 dBm 100 kHz
174 MHz to 230 MHz -54 dBm 100 kHz
230 MHz to 470 MHz -36 dBm 100 kHz
470 MHz to 862 MHz -54 dBm 100 kHz
862 MHz to 1 GHz -36 dBm 100 kHz
1 GHz to 5,15 GHz -30 dBm 1 MHz
5,35 GHz to 5,47 GHz -30 dBm 1 MHz
5,725 GHz to 26,5 GHz -30 dBm 1 MHz
4.4.1.3 Conformance
Conformance tests as defined in clause 5.3.4 shall be carried out.
4.4.2 Transmitter unwanted emissions within the 5 GHz RLAN bands
4.4.2.1 Definition
These are radio frequency emissions within the 5 GHz RLAN bands.
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15 ETSI EN 301 893 V1.3.1 (2005-08)
4.4.2.2 Limits
The average level of the transmitted spectrum within the 5 GHz RLAN bands shall not exceed the limits given in
figure 2.
dBc
0 dBc
- 20 dBc
- 28 dBc
- 40 dBc
- 42 dBc
-47 dBc
-216
-180 180 216
-30 -20 -11 -9 911 20 30
frequency offset [MHz]
NOTE: dBc is the spectral density relative to the maximum spectral power density of the transmitted signal.
Figure 2: Transmit spectral power mask
4.4.2.3 Conformance
Conformance tests as defined in clause 5.3.5 shall be carried out.
4.5 Receiver spurious emissions
4.5.1 Definition
Receiver spurious emissions are emissions at any frequency when the equipment is in receive mode.
4.5.2 Limits
The spurious emissions of the receiver shall not exceed the limits given in table 5.
Table 5: Spurious radiated emission limits
Frequency range Maximum power, ERP Measurement bandwidth
30 MHz to 1 GHz -57 dBm 100 kHz
1 GHz to 26,5 GHz -47 dBm 1 MHz
4.5.3 Conformance
Conformance tests as defined in clause 5.3.6 shall be carried out.
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16 ETSI EN 301 893 V1.3.1 (2005-08)
4.6 Dynamic Frequency Selection (DFS)
4.6.1 Introduction
An RLAN shall employ a Dynamic Frequency Selection (DFS) function to:
• detect interference from other systems and to avoid co-channel operation with these systems, notably radar
systems;
• provide on aggregate a uniform loading of the spectrum across all devices.
DFS is required in the frequency ranges 5 250 MHz to 5 350 MHz and 5 470 MHz to 5 725 MHz. This requirement
applies to all types of RLAN devices and to any type of communication between these devices.
Radar detection is not required in the frequency range 5 150 MHz to 5 250 MHz.
The DFS function as described in the present document is not tested for its ability to detect frequency hopping radar
signals.
4.6.1.1 Operational modes
Within the context of the operation of the DFS function, an RLAN device shall operate in either master mode or slave
mode. RLAN devices operating in slave mode (slave device) shall only operate in a network controlled by a RLAN
device operating in master mode (master device).
Some RLAN devices are capable of communicating in ad-hoc manner without being attached to a network. Devices
operating in this manner in the range 5 250 MHz to 5 350 MHz and 5 470 MHz to 5 725 MHz shall employ DFS and
should be tested against the requirements applicable to a master.
4.6.1.
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