ETSI EN 301 893 V1.2.3 (2003-08)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Broadband Radio Access Networks (BRAN); 5 GHz high performance RLAN; Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive35.110OmreževanjeNetworking33.060.01Radijske komunikacije na splošnoRadiocommunications in generalICS:Ta slovenski standard je istoveten z:EN 301 893 Version 1.2.3SIST EN 301 893 V1.2.3:2004en01-julij-2004SIST EN 301 893 V1.2.3:2004SLOVENSKI
STANDARD
ETSI ETSI EN 301 893 V1.2.3 (2003-08) 2
Reference DEN/BRAN-0020002-2 Keywords access, broadband, HIPERLAN, LAN, layer 1, radio, testing ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2003. All rights reserved.
DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 3
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.11 3.3 Abbreviations.11 4 Technical requirements specifications.12 4.1 Environmental profile.12 4.2 Carrier frequencies.12 4.2.1 Definition.12 4.2.2 Limits.12 4.2.3 Conformance.12 4.3 RF output power, Transmit Power Control (TPC) and power density.12 4.3.1 Definition.12 4.3.2 Limits.12 4.3.2.1 RF output power and power density at the highest power level.12 4.3.2.2 RF output power at the lowest power level.13 4.3.3 Conformance.13 4.4 Transmitter unwanted emissions.13 4.4.1 Transmitter unwanted emissions outside the 5 GHz RLAN bands.13 4.4.1.1 Definition.13 4.4.1.2 Limits.13 4.4.1.3 Conformance.13 4.4.2 Transmitter unwanted emissions within the 5 GHz RLAN bands.13 4.4.2.1 Definition.13 4.4.2.2 Limits.14 4.4.2.3 Conformance.14 4.5 Receiver spurious emissions.14 4.5.1 Definition.14 4.5.2 Limits.14 4.5.3 Conformance.14 4.6 Dynamic Frequency Selection (DFS).14 4.6.1 Interference Detection Threshold.16 4.6.1.1 Definition.16 4.6.1.2 Limit.16 4.6.1.3 Conformance.16 4.6.2 Channel Availability Check Time.16 4.6.2.1 Definition.16 4.6.2.2 Limit.16 4.6.2.3 Conformance.16 4.6.3 Channel Closing Transmission Time.16 4.6.3.1 Definition.16 4.6.3.2 Limit.16 4.6.3.3 Conformance.17 4.6.4 Channel Move Time.17 4.6.4.1 Definition.17 4.6.4.2 Limit.17 4.6.4.3 Conformance.17 4.6.5 Uniform Spreading.17 4.6.5.1 Definition.17 SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 4
4.6.5.2 Limit.17 5 Testing for compliance with technical requirements.17 5.1 Conditions for testing.17 5.1.1 Environmental conditions for testing.17 5.1.2 Test sequences.18 5.1.2.1 General test transmission sequences.18 5.2 Interpretation of the measurement results.18 5.3 Essential radio test suites.19 5.3.1 Product information.19 5.3.2 Carrier frequencies.19 5.3.2.1 Test conditions.19 5.3.2.2 Test methods.19 5.3.2.2.1 Conducted measurement.19 5.3.2.2.2 Radiated measurement.20 5.3.3 RF output power, Transmit Power Control (TPC) and power density.20 5.3.3.1 Test conditions.20 5.3.3.2 Test method.20 5.3.3.2.1 Conducted measurement.20 5.3.3.2.2 Radiated measurement.22 5.3.4 Transmitter unwanted emissions outside the 5 GHz RLAN bands.23 5.3.4.1 Test conditions.23 5.3.4.2 Test method.23 5.3.4.2.1 Conducted measurement.23 5.3.4.2.2 Radiated measurement.24 5.3.5 Transmitter unwanted emissions within the 5 GHz RLAN bands.24 5.3.5.1 Test conditions.24 5.3.5.2 Test method.25 5.3.5.2.1 Conducted measurement.25 5.3.5.2.2 Radiated measurement.25 5.3.6 Receiver spurious emissions.25 5.3.6.1 Test conditions.25 5.3.6.2 Test method.26 5.3.6.2.1 Conducted measurement.26 5.3.6.2.2 Radiated measurement.26 5.3.7 Dynamic Frequency Selection (DFS).26 5.3.7.1 Test conditions.26 5.3.7.2 Test method.27 5.3.7.2.1 Conducted measurement.28 5.3.7.2.2 Radiated measurement.31 Annex A (normative): The EN Requirements Table (EN-RT).32 Annex B (normative): Test sites and arrangements for radiated measurements.33 B.1 Test sites.33 B.1.1 Open air test sites.33 B.1.2 Anechoic chamber.34 B.1.2.1 General.34 B.1.2.2 Description.34 B.1.2.3 Influence of parasitic reflections.34 B.1.2.4 Calibration and mode of use.35 B.2 Test antenna.36 B.3 Substitution antenna.37 Annex C (normative): General description of measurement.38 C.1 Conducted measurements.38 C.2 Radiated measurements.38 C.3 Substitution measurement.39 SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 5
Annex D (normative): DFS parameters.40 Annex E (informative): The EN title in the official languages.41 Annex F (informative): Bibliography.42 History.43
ETSI ETSI EN 301 893 V1.2.3 (2003-08) 6
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 [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").
National transposition dates Date of adoption of this EN: 1 August 2003 Date of latest announcement of this EN (doa): 30 November 2003 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 May 2004 Date of withdrawal of any conflicting National Standard (dow): 31 May 2005
ETSI ETSI EN 301 893 V1.2.3 (2003-08) 7
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. - If needed, new standards for human exposure to Electromagnetic Fields, - if needed, new standards for acoustic safety Use of spectrum * If needed Scoped by
equipment
class or type Scoped by frequency and/or equipment type Disability* Privacy* Fraud* No harm to the network* Emergency* Interworking via
the network* Interworking with the network Non-radio Radio (RE) Non-TTE TTE 3.1b 3.2 3.3c 3.3b 3.3a 3.3d 3.3e 3.3f Radio Product EMC EN 301 489 multi-part EMC standard Generic and product standards also notified under EMC Directive Standards also notified under LV Directive 3.1a New radio harmonized standards Spectrum EMC Safety
Figure 1: Modular structure for the various standards used under the R&TTE Directive [1] SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 8
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, 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. SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 9
1 Scope The present document applies to 5 GHz high performance RLAN equipment that is intended to operate in the frequency bands 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 mechanism and implementing Transmit Power Control, as required in ERC DEC(99)23. NOTE: This mechanism is also required and described in ITU-R Recommendation M.1652. Table 1: Nominal carrier frequency allocations Carrier centre frequency fc (MHz) 5 180 5 200 5 220 5 240 5 260 5 280 5 300 5 320 5 500 5 520 5 540 5 560 5 580 5 600 5 620 5 640 5 660 5 680 5 700
The present document is intended to cover the provisions of Directive 1999/5/EC [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 [1] will apply to equipment within the scope of the present document. NOTE: A list of such ENs is included on the web site http://www.newapproach.org. SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 10 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". 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: 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 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 in-service monitoring: mechanism to check a channel in use by the RLAN for the presence of a radar signal with a level above the Interference Detection Threshold Master mode: operating mode in which the RLAN device has the capability to transmit without receiving an enabling signal 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. An RLAN device operating in Master mode shall use a Radar Interface Detection Function. SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 11 simulated radar burst: series of periodic radio wave pulses, separated by an interburst period during which no pulses are transmitted. Slave mode: operating mode in which the transmissions of the RLAN are under control of the Master NOTE: An RLAN device in Slave mode may use a Radar Interference Detection Function Transmit Power Control (TPC): technique in which the transmitter output power is controlled resulting in reduced interference to other systems 5 GHz RLAN bands: frequency ranges: 5 150 MHz to 5 350 MHz and 5 470 MHz to 5 725 MHz. 3.2 Symbols For the purposes of the present document, the following symbols apply: A Measured power output (dBm) B Radar burst period Chf Channel free from radars Chr Channel occupied by a radar D Measured power density E Field strength Eo
Reference field strength fc Carrier frequency G Antenna gain (dBi) L Radar burst length n Number of channels PH Calculated EIRP at highest power level PL Calculated EIRP at lowest power level PD Calculated power density R Distance Ro Reference distance 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 Electro-Magnetic Compatibility ERP Effective Radiated Power LV Low Voltage PHY Physical ppm parts per million PRF Pulse Repetition Frequency R&TTE Radio and Telecommunications Terminal Equipment RE Radio Equipment TPC Transmit Power Control Tx Transmit, Transmitter UUT Unit Under Test SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 12 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 supplier. The equipment shall comply with all the appropriate technical requirements of the present document at all times when operating within the boundary limits of the stated operational environmental profile. 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 fc defined in table 1. 4.2.2 Limits The actual carrier centre frequency for any given channel given in table 1 shall be maintained within the range fc ±20 ppm.
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 Definition The RF output power is the mean equivalent isotropically radiated power during a transmission burst. 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 the capability to operate at least 6 dB below the values for mean EIRP given in table 2. The power density is the mean equivalent isotropically radiated power density in dBm per MHz during a transmission burst.
4.3.2 Limits 4.3.2.1 RF output power and power density at the highest power level The RF output power and the power density when configured to operate at the highest stated power level shall not exceed the levels given in table 2.
Table 2: Mean EIRP limits for RF output power and power density at the highest power level Frequency range [MHz] mean EIRP [dBm] mean EIRP density limit [dBm/MHz] 5 150 to 5 350 23 11 5 470 to 5 725 30 18
ETSI ETSI EN 301 893 V1.2.3 (2003-08) 13 4.3.2.2 RF output power at the lowest power level The RF output power during a transmission burst when configured to operate at the lowest stated power level shall not exceed the levels given in table 3.
Table 3: Mean EIRP limits for RF output power at the lowest power level Frequency range [MHz] mean EIRP [dBm] 5 150 to 5 350 17 5 470 to 5 725 24 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, ERP [dBm] Bandwidth 30 MHz to 47 MHz -36 100 kHz 47 MHz to 74 MHz -54 100 kHz 74 MHz to 87,5 MHz -36 100 kHz 87,5 MHz to 118 MHz -54 100 kHz 118 MHz to 174 MHz -36 100 kHz 174 MHz to 230 MHz -54 100 kHz 230 MHz to 470 MHz -36 100 kHz 470 MHz to 862 MHz -54 100 kHz 862 MHz to 1 GHz -36 100 kHz 1 GHz to 5,15 GHz -30 1 MHz 5,35 GHz to 5,47 GHz -30 1 MHz 5,725 GHz to 26,5 GHz -30 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. SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 14 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. frequency offset [MHz] dBc 0 dBc -20 dBc -28 dBc - 40 dBc 0 9 11 20 30 -9 -11 -20 -30 -180 -216 180 216 - 42 dBc
47 dBc
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 defined as emissions of the active receiver. 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. 4.6 Dynamic Frequency Selection (DFS) 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.
ETSI ETSI EN 301 893 V1.2.3 (2003-08) 15 The DFS function as described in the present document is not tested for its ability to detect frequency agile radars.
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) can only operate in a network controlled by a RLAN device operating in Master mode (Master device). The operational behaviour and individual DFS requirements that are associated with these modes are as follows: Master devices: a) the Master device shall use a Radar Interference Detection function in order to detect radar signals with a level above the Interference Detection threshold in the frequency ranges 5 250 to 5 350 MHz and 5 470 to 5 725 MHz. Radar detection is not required in the frequency range 5 150 to 5 250 MHz.; b) the Master device initiates an RLAN network by transmitting control signals that will enable other RLAN devices, to associate (participate in a wireless network) with the Master device; c) before initiating a network on a channel, the Master shall perform a Channel Availability Check for a certain duration (Channel Availability Check Time) to ensure that there is no radar operating on the channel, using the Radar Interference Detection function described under a); d) during normal operation, the Master shall monitor the operating channel (In-Service Monitoring) to ensure that there is no radar operating on the channel, using the Radar Interference Detection function described under a); e) if the Master device has detected a radar signal, during In-Service Monitoring as described under d), the operating channel of the RLAN is made unavailable. The Master shall instruct all associated devices to stop transmitting on this channel, which they shall do within the Channel Move Time. The Aggregate Transmissions during the Channel Move Time should be limited to the Channel Closing Transmission Time; f) the Master shall not resume any transmissions on this channel during a period of 30 minutes after a radar signal was detected, using the Radar Interference Detection function described under a). This period is referred as the Non-Occupancy Period in figure 9. Slave devices: g) a Slave device shall not transmit before having received an appropriate enabling signal from a Master device; h) a Slave device shall stop all its transmissions whenever instructed by a Master device to which it is associated. The device shall not resume any transmissions until it has again received enabling signals from a Master device; i) a Slave device which is required to perform radar detection (see table D.3), shall stop its own transmissions if it has detected a radar. The Master device may implement the Radar Interference Detection function referred to under a) using another device associated with the Master. In such a case, the combination should be tested against the requirements applicable to the Master. See tables 6 and 7 for the applicability of DFS requirements prior to use a channel (Channel Availability Check) and during normal operation (In-Service Monitoring) for each of the above mentioned operational modes.
The manufacturer shall state whether the UUT is capable of operating as a Master and/or as a Slave. In the case the UUT is a Slave the maximum power level of the UUT will define whether or not the UUT needs to have Radar Interference Detection Function. If the UUT is capable of operating in more than one operating mode then each operating mode shall be tested separately. Table 6: Applicability of DFS requirements prior to use a channel
Requirement Operational Mode
Master Slave (without radar detection) Slave (with radar detection) Interference Detection Threshold
Not required Not required Channel Availability Check Time
Not required Not required Uniform Spreading
Not required Not required
ETSI ETSI EN 301 893 V1.2.3 (2003-08) 16 Table 7: Applicability of DFS requirements during normal operation Requirement Operational Mode
Master Slave (without radar detection) Slave (with radar detection) Interference Detection Threshold
Not required
Channel Closing Transmission Time
Channel Move Time
4.6.1 Interference Detection Threshold 4.6.1.1 Definition The Interference Detection Threshold is the level to be used by the DFS mechanism to detect radar interference.
4.6.1.2 Limit In the case of a Master the Interference Detection Threshold shall not exceed the value defined in table D.2. In the case of a Slave with radar detection the Interference Detection Threshold shall not exceed the value defined in table D.3. 4.6.1.3 Conformance Conformance tests for this requirement are defined in clause 5.3.7. 4.6.2 Channel Availability Check Time 4.6.2.1 Definition The Channel Availability Check Time is defined as the time during which a channel shall be checked for the presence of a radar signal (table D.4) with a level above the Interference Detection Threshold (table D.2). No transmissions shall occur during this time. This channel availability check shall be performed by the Master device after it is powered on and before it can initiate a network on a channel, or in the event that the network has to move to a new channel and no information is available about the presence of radar transmissions on that channel.
4.6.2.2 Limit The Channel Availability Check Time shall not be less than the value defined in table D.1. 4.6.2.3 Conformance Conformance tests for this requirement are defined in clause 5.3.7. 4.6.3 Channel Closing Transmission Time
4.6.3.1 Definition The Channel Closing Transmission Time is defined as the aggregate duration of transmissions of the RLAN device during the Channel Move Time which starts upon detection of an interfering signal above the Interference Detection Threshold. The aggregate duration of all transmissions shall not include quiet periods in between transmissions. 4.6.3.2 Limit The Channel Closing Transmission Time shall not exceed the limit defined in table D.1. SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 17 4.6.3.3 Conformance Conformance tests for this requirement are defined in clause 5.3.7. 4.6.4 Channel Move Time 4.6.4.1 Definition The Channel Move Time is defined as the time taken by an RLAN device to cease all transmissions on the channel upon detection of an interfering signal above the Interference Detection Threshold. 4.6.4.2 Limit The Channel Move Time shall not exceed the limit defined in table D.1. 4.6.4.3 Conformance Conformance tests for this requirement are defined in clause 5.3.7. 4.6.5 Uniform Spreading
4.6.5.1 Definition The intention of the uniform spreading is to provide, on aggregate, a uniform loading of the spectrum across all devices. This requires that the UUT, when operating on an individual basis, shall select an operating channel out of a minimum of 14 channels from those listed in table 1 so that the probability of selecting a given channel shall be the same for all channels. Devices using only the band 5 470 to 5 725 MHz shall select an operating channel out of the 11 channels listed in table 1 for this band so that the probability of selecting a given channel shall be the same for all channels. In countries where the whole frequency range defined in clause 3.1 may not be available, the number of required channels for the spreading shall be adjusted accordingly. When operating as part of a network of devices, that includes more than one device operating in Master mode, the selection of the operating channel may be under control of the network. 4.6.5.2 Limit The probability of selecting each channel shall be within 10 % of the theoretical probability. For "n" channels, the theoretical probability is 1/n. 5 Testing for compliance with technical requirements 5.1 Conditions for testing 5.1.1 Environmental conditions for testing Tests defined in the present document shall be carried out at representative points within the boundary limits of the stated operational environmental profile. Where technical performance varies subject to environmental conditions, tests shall be carried out under a sufficient variety of environmental conditions (within the boundary limits of the stated operational environmental profile) to give confidence of compliance for the affected technical requirements. SIST EN 301 893 V1.2.3:2004

ETSI ETSI EN 301 893 V1.2.3 (2003-08) 18 5.1.2 Test sequences 5.1.2.1
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