hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
|---|---|---|---|
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 6.4 Positioner | Most automotive radars are singular polarized and the positioners shall keep the EUT polarization alignment while having enough accuracy for the azimuth and elevation angular measurements. Accuracy of angular measurements requires that positioner movements keep the EUT always accurately and repeatedly positioned at the... |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7 Radiated Measurements | |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.1 Receiver Baseline Sensitivity | |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.1.1 General | Receiver Baseline Sensitivity is the capability to receive a wanted signal at application related defined input signal levels while providing a pre-determined minimum acceptable level of technical performance. To address the test case with the companion device as explained in ETSI EN 303 883-2 [i.2] for radar systems a... |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.1.2 Radar Echo Generation/Target Simulation | This test assumes that data from the radar sensor under test can be displayed and recorded. Whether the display is in list format of range/Doppler/RCS or birds eye view or FFT view is up to the user. It has to be ensured that the data from the radar can be observed during this test. Recommended measurement procedure: 1... |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.1.3 Receiver Sensitivity | To test the receiver sensitivity a radar target has to be generated at the desired range of test. By reducing the power output of the RTS/REG the sensitivity level of the radar can be found once the radar does not detect the simulated target anymore. To perform this test one should prevent receiver saturation of the RT... |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.2 Receiver Baseline Resilience | |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.2.1 General | Receiver Baseline Resilience (RBR) is defined as the capability to maintain a pre-determined minimum acceptable level of performance in the presence of unwanted signals in the frequency band of operation, applicable adjacent and remote frequency bands. An RTS/REG is able to generate the required reference object, opera... |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.2.2 Interference Signal Generation | |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.2.2.1 General | To test interference signal handing, RTS/REG also can be used to transmit interference signals towards the radar under test. In addition to the simulated radar echo signal the RTS/REG can generate any other RF signal. ETSI ETSI TS 103 788 V1.1.1 (2022-09) 22 Depending on the required test there are several test and mea... |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.2.2.4 Interference signal injection with IF path of RTS/REG (setup 3) | The most convenient setup is to use the IF path of the RTS/REG and a low frequency signal generator (AWG, SG). The maximum output power of the target and interferer is defined by the RTS/REG IF path gain and mmWave remote head. Recommendation The setup is recommended in case the interference signal shall be originating... |
0f258184f7db742a7f34b0fc753170a2 | 103 788 | 7.3 Temperature Testing | Automotive radar sensors are part of the car's components most exposed to environmental influences. Testing over a certain temperature range is required. RTS/REG equipment is specified to operate at a certain temperature range. This temperature range is typically much smaller than the temperature range of the test. The... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 1 Scope | The present document covers the following radio access technology: • 5G NR. The methodology described in the present document is to measure Base Station dynamic energy efficiency. Within the present document, it is referred to as dynamic measurement. The results based on dynamic measurements of the BS provide energy ef... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 2 References | |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 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 a... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 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 i... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 3 Definition of terms, symbols and abbreviations | |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 3.1 Terms | For the purposes of the present document, the following terms apply: Base Station (BS): radio access network component which serves one or more radio cells and interfaces the user terminal (through air interface) and a wireless network infrastructure BS test control unit: unit which can be used to control and manage BS... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 3.2 Symbols | Void. |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 3.3 Abbreviations | For the purposes of the present document, the following abbreviations apply: AC Alternating Current BH Busy Hour BS Base Station BSEE Base Station Energy Efficiency DC Direct Current DL DownLink DUT Device Under Test eMBB enhanced Mobile BroadBand GUM Guide to the expression of Uncertainty in Measurement HW HardWare KP... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 4 Assessment method | The assessment method is covering the BS equipment dynamic energy efficiency for which the present document defines reference BS equipment configurations and reference load levels to be used when measuring BS energy efficiency. The assessment procedure contains the following tasks: 1) Identification of equipment under ... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 5.1 Reference configurations | The BS equipment is a network component which serves a number of user equipment within a specific coverage area over an air interface. A BS interfaces user equipment (through air interface) and a wireless network infrastructure. Reference configurations are defined in Annex B. These configurations cover integrated and ... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 5.2 Measurement and test equipment requirements | The measurement of the power consumption shall be performed by either measuring the power supply voltage and true effective current in parallel and calculate the resulting power consumption (applicable only for DC) or with a wattmeter (applicable for both AC and DC). The measurements can be performed by a variety of me... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 5.3 BS Configuration | The BS shall be tested under normal test conditions according to the information accompanying the equipment. The BS, test configuration and mode of operation (baseband, control and RF part of the BS as well as the software and firmware) shall represent the normal intended use and shall be recorded in the test report. T... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 5.4 Transmit Signal and RF output power | The maximum RF transmit power that the Base Station under test is capable of, shall be reported. The Base Station under test shall control the RF transmit signal to fulfil the traffic profiles as listed in Annex C. ETSI ETSI TS 103 786 V1.3.1 (2024-09) 13 The power amplifier(s) of the BS shall support the same crest fa... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 5.5 UE Emulator requirements and settings | UE power consumption is not considered in the present document. However, UE category and performance has a significant impact on the Base Station energy efficiency. To assess energy efficiency of the BS, the UE capabilities represented by the UE emulator shall be used as follows: • The UE emulator shall provide the tot... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 5.6 Environmental conditions | For the BS energy efficiency measurements, the environmental conditions under which the BS shall be tested are defined as follows. Table 1: BS environmental conditions Condition Minimum Maximum Barometric pressure 86 kPa (860 mbar) 106 kPa (1 060 mbar) Relative Humidity 20 % 85 % Vibration Negligible Temperature +25 °C... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 5.7 Power supply | For the measurements, the following operating voltage values shall be used. Equipment designed for non-standard power supply voltages one shall use the nominal equipment operating voltage (±2,5 % tolerance). Nominal value and operating value for AC testing shall be according to [2] and for DC testing to [1] and [3]. Th... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6 Dynamic energy efficiency assessment | |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.1 Overview energy efficiency | For dynamic measurement, the BS shall be operated in a test and measuring environment as illustrated in Figure 3. For BS energy efficiency measurements, the following items are specified for each system in Annexes B and C: • Reference configuration (Annex B). • Frequency bands (Annex B). • Traffic load levels (Annex C)... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2 Energy efficiency measurement | |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.1 Measurement lab setup | Figure 3 shows the test setup using a UE emulator and a channel emulator connected to the BS under test. A traffic generator is used to generate both data traffic requested by the UEs and measuring the received data by the UEs during the test. The test setup in Figure 3 is applicable for 5G NR and LTE as an anchor, Non... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.2 UE distribution | The UEs are distributed in three different path loss regions, low path loss, medium path loss and high path loss regions as shown in Figure 4. The path loss value for each region is according to Table C.3. The number of UEs for low, medium, and busy-hour traffic load scenarios are different and are according to Annex C... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.3 Data traffic model | The traffic model used for BS energy efficiency measurement in the present document is based on artificially generated data traffic by a traffic generator. This traffic generator is either inbuilt in the UE emulator used in the test setup or is a standalone traffic generator. The following requirements shall be fulfill... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.4 Test Time Definition | The test time is fixed according to Table C.2. This test time is denoted as Ttest and it is the time between the start of the measurement and the time when the UEs stop requesting files. The test time for low, medium and busy-hour traffic load scenarios are in the following denoted as: Ttest-low, Ttest-medium, and Ttes... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.5 Low traffic model | For low load traffic scenario, the amount of delivered data is at a low level due to low number of connected UEs. The number of connected UEs for low load scenario is defined in Table C.3. |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.6 Medium traffic model | For medium load traffic scenario, the amount of delivered data is at a medium level due to medium number of connected UEs. The number of connected UEs for medium load scenario is defined in Table C.3. |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.7 Busy-hour traffic model | For busy-hour load traffic scenario, the amount of delivered data is at a busy-hour level due to high number of connected UEs. The number of connected UEs for busy-hour load scenario is defined in Table C.3. |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.8 Data Volume Measurement | All received data by the UEs during the test time of each traffic load scenario shall be measured. The measured data is the net data volume and shall not contain any duplicated or retransmitted data. The data shall be generated as described in clause 6.2.3 and Annex C. The measured data in Mbits will be used for calcul... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.9 Power and Energy Consumption Measurement | The energy consumption measurements shall be performed when stable temperature conditions inside the equipment are reached. For this purpose, the BS shall be placed in the environmental conditions for minimum two hours with a minimum operation time of one hour before starting the measurements. After change of traffic l... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.10 Energy Consumption measurement | The energy consumption of the Base Station under test shall be measured during the test time of each traffic load level scenario. The total daily energy consumption of the Base Station will be the sum of weighted energy consumption for each traffic load level scenario, i.e. low, medium and busy-hour traffic. For the ca... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.11 Base Station Energy Efficiency KPI | The Base Station Energy Efficiency (BSEE) KPI is an indicator for showing how energy efficient a Base Station is for doing a work. This work in the present document is defined as delivered useful bits to UEs covered by this Base Station. A Base Station is more energy efficient when doing more work with same energy, doi... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 6.2.12 UE quality of service KPI | The final report shall include UE's quality of service KPI as throughput. For every transmitted file, an average throughput for that file shall be calculated. Average throughput of a file is calculated as file size divided by file transmission time. Transmission time starts when a UE requests a file and ends when the c... |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 7 Uncertainty | The measurement expanded uncertainty shall be assessed according to Annex E. ETSI ETSI TS 103 786 V1.3.1 (2024-09) 20 |
4159822647ea2b68a93c2e942ccb338c | 103 786 | 8 Measurement report | The results of the assessments shall be reported accurately, clearly, unambiguously and objectively, and in accordance with any specific instructions in the required method(s). A list of reference parameters, measurement conditions, test results, uncertainty analysis (see Annex E) and derived calculation results shall ... |
7039b5c82545309841e61876569b2020 | 103 740 | 1 Scope | The present document provides speech transmission performance requirements for wireless terminals; it addresses several types of mobile wireless terminals, including softphones. The present document addresses hands-free functionality of wideband wireless terminals. Test methods and performance requirements apply (but a... |
7039b5c82545309841e61876569b2020 | 103 740 | 2 References | |
7039b5c82545309841e61876569b2020 | 103 740 | 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 a... |
7039b5c82545309841e61876569b2020 | 103 740 | 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 i... |
7039b5c82545309841e61876569b2020 | 103 740 | 3 Definitions of terms, symbols and abbreviations | |
7039b5c82545309841e61876569b2020 | 103 740 | 3.1 Terms | For the purposes of the present document, the following terms apply: artificial ear: device for the calibration of earphones incorporating an acoustic coupler and a calibrated microphone for the measurement of the sound pressure and having an overall acoustic impedance similar to that of the median adult human ear over... |
7039b5c82545309841e61876569b2020 | 103 740 | 3.2 Symbols | Void. |
7039b5c82545309841e61876569b2020 | 103 740 | 3.3 Abbreviations | For the purposes of the present document, the following abbreviations apply: a.c. alternative current AH,S,dt attenuation range in send direction during double talk AM-FM Amplitude and Frequency Modulated AMR-WB Adaptive MultiRate codec - Wideband CS Composite Source CSS Composite Source Signal DECT Digital Enhanced Co... |
7039b5c82545309841e61876569b2020 | 103 740 | 4 Void | |
7039b5c82545309841e61876569b2020 | 103 740 | 5 Test Configurations | |
7039b5c82545309841e61876569b2020 | 103 740 | 5.1 Set-up interface | The generic schematic as defined in figure 5.1-1 is applicable to any wireless link. NOTE: The "whole" terminal includes all the components from "RF interface" to the transducers and may include an additional (radio) link. The air interface considered in the figure is not the additional radio link. Figure 5.1-1: Set-up... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2 Set-up for terminals | |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.0 Overview | For electroacoustical testing, HATS as described in Recommendation ITU-T P.58 [8] shall be used, which is equipped with a mouth simulator and two artificial ears. In general, most measurements described in the present document can be conducted with one artificial ear. However, for some measurements, the usage of both a... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.1 Handheld terminal | HATS measurement equipment shall be configured to the Handheld hands-free UE according to figure 5.2.1-1. The HATS should be positioned so that the HATS Reference Point is at a distance dHF from the centre point of the visual display of the Mobile Station. The distance dHF is specified by the manufacturer. A vertical a... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.2 Vehicle mounted hands-free | Test arrangement, test methods and performance requirements are according to Recommendation ITU-T P.1110 [21]. |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.3 Desktop hands-free terminal | For HATS test equipment, definition of hands-free terminals and setup for desktop hands-free terminals is based on Recommendation ITU-T P.581 [14]. ETSI ETSI TS 103 740 V1.4.1 (2021-10) 13 Figure 5.2.3-1: Position for test of desktop hands-free terminal side view Figure 5.2.3-2: Position for test of desktop hands-free ... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.4 Additional test setup for handsfree function with softphone | |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.4.0 Overview | Two types of softphones are to be considered: • Type 1 is to be used as a desktop type (e.g. notebook). • Type 2 is to be used as a handheld type (e.g. PDA). When manufacturer gives conditions of use, they will apply for test. If no other requirement is given by manufacturer softphone will be positioned according the f... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.4.1 Softphone including speakers and microphone | Figure 5.2.4.1-1: Configuration of softphone relative to the HATS side view Figure 5.2.4.1-2: Configuration of softphone relative to the HATS-top sight ETSI ETSI TS 103 740 V1.4.1 (2021-10) 15 |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.4.2 Softphone with separate speakers | When separate loudspeakers are used, system will be positioned as in figure 5.2.4.2-1. Figure 5.2.4.2-1: Configuration of softphone using external speakers relative to the HATS-top sight When external microphone and speakers are used, system will be positioned as in figure 5.2.4.2-2. Figure 5.2.4.2-2: Configuration of ... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.2.5 Test setup for variable echo path | Test setup for desktop hands-free terminals: A notebook is positioned at least 20 cm in front of the device (or devices) with the transducers, as shown in figure 5.2.5-1. The notebook lid is moved during the measurement. > 20cm Figure 5.2.5-1: Positioning of DUT Test setup for softphone: The test setup is described in ... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.3 Acoustical environment | In general, different acoustical environments have to be taken into account: either room noise and background noise are an inherent part of the test environment or room noise and background noise shall be eliminated to such an extent that their influence on the test results can be neglected. Unless stated otherwise mea... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.4 Test signals | Modern wireless terminals often deploy non linear and time-varying processing. As such terminals are designed for speech transmission, the most appropriate test signal is real speech. Appropriate test signals (general description) are defined in Recommendation ITU-T P.501 [12]. ETSI ETSI TS 103 740 V1.4.1 (2021-10) 17 ... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.5 Calibration | |
7039b5c82545309841e61876569b2020 | 103 740 | 5.5.1 Send | Unless specified otherwise, the test signal level shall be -4,7 dBPa at the MRP. The various steps for calibration of the artificial mouth are described in Recommendation ITU-T P.581 [14]. The spectrum of acoustic signal produced by the artificial mouth is equalized under freefield conditions at the MRP. The test setup... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.5.2 Receive | Unless specified otherwise, the applied test signal level at the digital input shall be -16 dBm0, measured according to Recommendation ITU-T P.56 [7] at the digital reference point or the equivalent analogue point. All measurement values produced by HATS are intended to be free-field equalized according Recommendation ... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.5.3 Setup of background noise simulation | A setup for simulating realistic background noises in a lab-type environment is described in ETSI TS 103 224 [2]. ETSI TS 103 224 [2] contains a description of the recording arrangement for realistic background noises, a description of the setup for a loudspeaker arrangement suitable to simulate a background noise fiel... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.6 Environmental conditions for tests | The following conditions shall apply for the testing environment: a) Ambient temperature: 15 °C to 35 °C (inclusive); b) Relative humidity: 5 % to 85 %; c) Air pressure: 86 kPa to 106 kPa (860 mbar to 1 060 mbar). |
7039b5c82545309841e61876569b2020 | 103 740 | 5.7 Accuracy of test equipment | Unless specified otherwise, the accuracy of measurements made by test equipment shall be better than: Table 5.7-1: Accuracy of measurements Item Accuracy Electrical Signal Level Electrical Signal Level Sound pressure Frequency Time Measured maximum frequency Clock Accuracy ±0,2 dB for levels ≥ -50 dBV ±0,4 dB for level... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.8 Power feeding conditions | For terminal equipment, which is directly powered from the mains supply, all tests shall be carried out within ±5 % of the rated voltage of that supply. If the equipment is powered by other means and those means are not supplied as part of the apparatus, all tests shall be carried out within the power supply limit decl... |
7039b5c82545309841e61876569b2020 | 103 740 | 5.9 Influence of terminal delay on measurements | As delay is introduced by the terminal, care shall be taken for all measurements where exact position of the analysis window is required. It shall be checked that the test is performed on the test signal and not any other signal. 6 Codec independent requirements and associated Measurement Methodologies |
7039b5c82545309841e61876569b2020 | 103 740 | 6.1 Send and receive frequency response | |
7039b5c82545309841e61876569b2020 | 103 740 | 6.1.1 Send frequency response | Requirements The send sensitivity frequency response from the MRP to the measurement output (digital or analogue output according measurement system used) shall within the mask which can be drawn with straight lines between the breaking points in table 6.1.1-1 on a logarithmic (frequency) - linear (dB sensitivity) scal... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.1.2 Receive frequency response | |
7039b5c82545309841e61876569b2020 | 103 740 | 6.1.2.1 Handheld terminal | Requirements The receive sensitivity frequency response from the measurement input (digital or analogue input according measurement system used) to ear of HATS free field corrected shall be within the mask which can be drawn with straight lines between the breaking points in table 6.1.2.1-1 on a logarithmic (frequency)... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.1.2.2 Void | |
7039b5c82545309841e61876569b2020 | 103 740 | 6.1.2.3 Softphone (computer-based terminals) | Type 1 or softphone with external speakers: The requirement as for desktop terminals applies. Type 2: The requirement as for handheld terminals applies. ETSI ETSI TS 103 740 V1.4.1 (2021-10) 23 |
7039b5c82545309841e61876569b2020 | 103 740 | 6.1.2.4 Desktop Terminal | Requirements The receive sensitivity frequency response from the measurement input (digital or analogue input according measurement system used) to ear of HATS free field corrected shall be within the mask which can be drawn with straight lines between the breaking points in table 6.1.2.4-1 on a logarithmic (frequency)... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.2 Send and receive loudness ratings | |
7039b5c82545309841e61876569b2020 | 103 740 | 6.2.1 Send Loudness Ratings | Requirement The nominal values of SLR shall be: SLR = +13 dB ± 3 dB (3) Measurement method The test signal to be used for the measurements shall be the British-English single talk sequence described in clause 7.3.2 of Recommendation ITU-T P.501 [12]. ETSI ETSI TS 103 740 V1.4.1 (2021-10) 24 The terminal is positioned a... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.2.2 Microphone (Mic) mute | Requirement The SLR (Send Loudness Rating) with mic mute on shall be at least 50 dB higher than with mic mute off. Measurement method The terminal is set up as described in clause 6.2.1, but its microphone shall be configured to be muted. Measurement and calculation method are the same as in clause 6.2.1. |
7039b5c82545309841e61876569b2020 | 103 740 | 6.2.3 Receive Loudness Ratings | Requirements Handheld terminal Nominal value of RLR shall be 9 dB ± 3 dB. This value has to be fulfilled for at least one volume setting. Value of RLR at maximum volume setting shall be less than (louder) or equal to +5 dB. Range of volume control (RLR measured at minimum and maximum volume setting) shall be larger tha... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.2.4 Send Loudness Level | Requirements The nominal value of Send Loudness Level (SLL) shall be: SLL = 71 phon ± 4 phon Measurement method The test signal to be used for the measurements shall be the British-English single talk sequence described in clause 7.3.2 of Recommendation ITU-T P.501 [12]. The terminal is set up as described in clause 5.... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.2.5 Receive Loudness Level | Requirements Handheld terminal The nominal value of Receive Loudness Level (RLL) shall be 67 ± 4 phon. This value has to be fulfilled for at least one volume setting. Value of RLL at maximum volume setting shall be louder than or equal to 71 phon. Range of volume control (RLL measured at minimum and maximum volume sett... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.3 Send and receive noise | |
7039b5c82545309841e61876569b2020 | 103 740 | 6.3.1 Send Noise | Requirements The send noise shall not exceed -64 dBm0(A). No peaks in the frequency domain higher than 10 dB above the average noise spectrum shall occur. Requirement as for other tests is identical for all types of terminals. NOTE: Softphones with cooling devices (fans) can produce a rather high level of noise, furthe... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.3.2 Receive Noise | Requirements The receive noise level shall not exceed -54 dBPa(A) at nominal setting of the volume control. The level in any 1/3-octave band, between 100 Hz and 10 kHz shall not exceed a value of -64 dBPa. No peaks in the frequency domain higher than 10 dB above the average noise spectrum shall occur. NOTE 1: Void. NOT... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.4 Send and receive distortion | |
7039b5c82545309841e61876569b2020 | 103 740 | 6.4.0 General | It is not intended to provide codec-dependant requirements but to assess the electroacoustic performances of the terminal. |
7039b5c82545309841e61876569b2020 | 103 740 | 6.4.1 Send distortion | Requirements The ratio of signal to harmonic distortion shall be above the following mask. Table 6.4.1-1: Limits for harmonic distortion ratio for send Frequency (Hz) Signal to harmonic distortion ratio limit, send (dB) 200 25 315 26 400 30 1 000 30 2 000 30 NOTE: The limits for intermediate frequencies lie on straight... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.4.2 Receive distortion | Requirement • Handheld terminal The ratio of signal to harmonic distortion shall be above the following mask. Table 6.4.2-1: Limits for harmonic distortion ratio for receive Frequency Signal to distortion ratio limit, receive for vehicle mounted or desktop terminal at nominal volume Signal to distortion ratio limit, re... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.5 Terminal Coupling Loss (TCL) | Requirements In order to meet talker echo objective requirements [6], the recommended terminal coupling loss during single talk (TCL) should be greater than 55 dB at nominal setting of the volume control. The TCL shall be ≥ 46 dB for all settings of the volume control (if supplied). ETSI ETSI TS 103 740 V1.4.1 (2021-10... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.6 Stability Loss (or similar parameters) | Requirements For the calculation the averaged measured echo level at each frequency band is referred to the averaged test signal level measured in each frequency band. The attenuation shall exceed 6 dB for all frequencies and for all settings of volume control. Measurement method Test set-up is identical as for TCL as ... |
7039b5c82545309841e61876569b2020 | 103 740 | 6.7 Double talk performance | |
7039b5c82545309841e61876569b2020 | 103 740 | 6.7.0 Overview | During double talk the speech is mainly determined by 2 parameters: impairment caused by echo during double talk and level variation between single and double talk (attenuation range). In order to guarantee sufficient quality under double talk conditions the Talker Echo Loudness Rating should be high and the attenuatio... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.