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8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 5.2 Terminating impedances | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 5.2.1 ZADSL-1 and ZADSL-2 | In many of the tests with voice frequencies, the ADSL port of the low pass filter is terminated with an impedance called ZADSL-1. This impedance model represents the input impedance of the ADSL transceiver (with the HPF), as seen from the low pass filter. This substitute circuit shown in figure 3 is a model which shall... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 5.2.2 ZR and ZSL | For most requirements relating to voice band frequencies described in the present document, either the terminating impedances ZR or ZSL is used to terminate the POTS port or the Line port. ZR is the European harmonized complex impedance, ZSL is an impedance used in TBR 038 [1] to simulate a short line terminated in 600... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 5.2.3 ZRHF | For requirements relating to ADSL frequencies described in the present document, the terminating impedance ZRHF is used to terminate POTS and line ports of the low pass filter. This is the European harmonized complex impedance ZR with the modification proposed in TR 102 139 [2]. This network is shown in figure 7. 150nF... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 5.2.4 ZON | For some on-hook requirements (as defined in clause 5.1.2) described in the present document, the terminating impedance ZON is used. Actual impedances will vary greatly especially over the ADSL frequency range and thus the impedance model adapted here is just intended for the verification of splitters. It is not intend... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 5.3 General transmission test set-up | For many of the transmission related tests that are specified in the present document, a common general test setup is valid. This test set-up is given in figures 9 and 10, for measurements at the LINE port and POTS port respectively. It is required that a splitter also fulfils all requirements (with the exception of th... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6 Splitter requirements | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.1 Options for splitter requirements | The electrical requirements in the present document are divided into two categories, option A and option B. In a practical sense, the requirements for Option A and Option B are identical with the exception of two clauses. The clauses in question are that specifying pass band return loss requirements in the off-hook sta... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.1.1 Option A splitters | • Option A splitters will meet return loss requirements for two reference impedances, which is appropriate for networks where the population of existing terminals or network presentations includes equipment designed against several different reference impedance values. • Conversely, this option assumes that potential s... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.1.2 Option B splitters | • Option B splitters are considered to be appropriate to networks where concerns of sidetone and far end echo effects motivate a very high return loss requirement. • Additionally, this return loss requirement is only valid for one reference impedance, and thus option B splitters are appropriate for networks for which i... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.2 DC requirements | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.2.1 DC resistance to earth | The DC resistance between each terminal (i.e. A-wire and B-wire) of the splitter and earth, when tested with 100 V DC, shall not be less than 20 MΩ. This requirement only applies to splitters with a terminal directly connected to earth. |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.2.2 DC Insulation resistance between A-wire and B-wire | The DC resistance between the A-wire and B-wire terminal of the splitter, when tested with 100 V DC, shall not be less than 5 MΩ. In the case where the splitter is fitted with a signature network, measurement of the DC isolation resistance becomes more difficult. Possible solutions include a switching system in order t... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.2.3 DC series resistance | The DC resistance from the A-wire to the B-wire at the Line interface with the POTS terminal shorted, or at the POTS interface with the Line terminal shorted shall be less than or equal to 50 Ω. This requirement shall be met for the feeding conditions described in clause 5.1.2 for both on and off hook conditions. |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.3 Ringing frequency requirements | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.3.1 Voltage drop at 25 Hz and 50 Hz | Ringing signals with frequencies of 25 Hz and 50 Hz shall be used. The maximum voltage drop at the load impedance due to the insertion of one splitter, in the test set-up of figure 9, shall be not more than 2 Vrms. Table 1: Test conditions Voltage drop at 25 Hz and 50 Hz Impedance of signal source 850 Ω(resistive) Impe... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.3.2 Impedance at 25 Hz and 50 Hz | The POTS port and the Line port of the splitter shall have an impedance (when measured between the A-wire and the B-wire) at 25 Hz and 50 Hz of not less than 40 kΩ. When testing at either the POTS port or the LINE port all other ports are open circuit. |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.3.3 Total harmonic distortion at 25 Hz and 50 Hz | The splitter shall be able to transfer the ringing signals to the AC-load without significant distortion. This is tested with two sets of source and feeding voltages, as given in table 2. The test shall be carried out at 25 Hz and 50 Hz. With those voltages applied, the total harmonic distortion of the AC signal shall ... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.4 Pass band loss requirements (on-hook) | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.4.1 On hook requirement for the case of high impedance injection | The magnitude of the voltage gain of the splitter in the range 200 Hz to 2 800 Hz shall be within the range -4 dB to +4 dB for the on-hook case with high impedance injection. A DC voltage of 50 V shall be used. The test set ups are given in figures 9 and 10. The test shall be executed with the combinations of source an... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.4.2 On hook requirement for the case of low impedance injection | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.4.2.1 On-hook insertion loss | The insertion loss of one splitter shall be less then 1 dB at 1 kHz for the on-hook case with low impedance injection. The test set ups are given in figures 9 and 10. The off-hook pass band insertion loss shall be measured according to both figures 9 and 10 for either an LE or and TE splitter. In either case both the s... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.4.2.2 On-hook insertion loss distortion | The absolute difference between the insertion loss at any frequency in the range 200 Hz to 2 800 Hz and the insertion loss at 1 kHz shall be less then 1 dB. The off-hook pass band insertion loss distortion shall be measured according to both figures 9 and 10 for either an LE or a TE splitter. In either case both the so... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.5 Pass band loss requirements (off-hook) | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.5.1 Off-hook pass band insertion loss | The insertion loss of one splitter shall be less then 1 dB at 1 kHz. The test set ups are given in figures 9 and 10. The off-hook passband insertion loss shall be measured according to both figures 9 and 10 for either an LE or a TE splitter. Level of the test signal = -4 dBV emf. The test shall be executed with both co... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.5.2 Off-hook passband insertion loss distortion | The absolute difference between the insertion loss at any frequency in the range 200 Hz to 4 000 Hz and the insertion loss at 1 kHz shall be less then 1 dB. The test shall be executed with both combinations of source and load impedances in table 4. The test set-ups are described in figures 9 and 10, the off-hook DC fee... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.6 Passband return loss requirements (off-hook) | The return loss at both the POTS and Line port of the splitter shall be measured according to figures 9 and 10. The definition of return loss (for the case of a measurement at the POTS port) is given in figure 11. Line port Splitter ADSL load |Z1 + Z2| RL = 20*log ------------ |Z1 - Z2| Z1 Z2 POTS port ADSL port Figure... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.6.1 Return loss requirements options A and B | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.6.1.1 Return loss requirements, option A | The device shall meet all the return loss requirements specified in table 5. NOTE: Option A is appropriate for networks where the population of existing terminals or network presentations includes equipment designed against several different reference impedance values (e.g. 600 Ω, harmonized European reference impedanc... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.6.1.2 Return loss requirements, option B | The device shall meet the return loss requirements specified in figure 12. NOTE: Option B is appropriate for networks for which it is felt that one single reference impedance is sufficient to accommodate the needs of all terminals and network presentations. Minimum Return 300 500 2 000 3 400 db Hz 18 14 Frequency (log ... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.8 Unbalance about Earth | The basic test set-up for measuring unbalance at the POTS port is shown in figure 13. In the case of measuring at the LINE port, the test set-up of figure 13 is used, however with the POTS and LINE terminations reversed. The test shall be carried out for the combinations described in table 7. Note that the source and m... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.9 ADSL band loss requirements | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.9.1 On-hook loss requirements | Applying an input test signal of -6 dBV emf to either the POTS or LINE port of the splitter, the maximum output voltage level measured over the load impedance shall be below the template of figure 14. The DC feeding conditions for the on-hook condition are given in clause 5.1.2. The test setups are given in figures 9 a... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.9.2 Off-hook isolation requirements | In the case where the return loss requirement of option A (see clause 6.6.1.1) is used in specifying the splitter, the off- hook isolation requirement of table 10 shall be fulfilled. In the case where the return loss requirement of Option B (see clause 6.6.1.2) is used in specifying the splitter, the off- hook isolatio... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.10 Noise | The noise requirements of clause 6.10.1 are valid for the off-hook condition. The noise requirements of clause 6.10.2 are valid for both the on-hook and off-hook condition. The DC feeding conditions are given in clause 5.1.2. |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.10.1 Audible noise level requirements | The psophometric noise power, as defined in ITU-T Recommendation O.41 [6], measured at the LINE port and the POTS port of a splitter, shall be less than -75 dBmp. The psophometer shall be referenced to ZR. LINE port and POTS port should be terminated with ZR. The ADSL port is terminated with the ADSL load as defined in... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.10.2 ADSL band noise level requirements | In the case of a LE splitter, the noise in the frequency range 26 kHz to 1 104 kHz due to the splitter, measured at the both the ADSL port and at the LINE port, should be less than -125 dBm/Hz measured in a bandwidth of 10 kHz. In the case of a TE splitter, the noise in the frequency range 26 kHz to 1 104 kHz due to th... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.11 Distortion and intermodulation distortion | |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.11.1 POTS band intermodulation distortion requirements | The test setup to be used is given in figure 9. Both the source and load impedance used shall be equivalent to ZR. This requirement is valid for both the on-hook and off hook conditions. The DC feeding conditions are given in clause 5.1.2. The test signal to be used is as according to ITU-T Recommendation O.42 [3]. Usi... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.12 Group delay distortion | The increase of the group delay distortion by inserting one splitter shall be less than the figures in table 12, relative to the lowest measured delay in the frequency range 300 Hz to 4 000 Hz. Table 12: Group delay distortion, maximum values Frequency range Maximum value 200 Hz to 600 Hz 250 µs 600 Hz to 3 200 Hz 200 ... |
8c4ec4fff2a43554b79399ea8b2991ab | 101 952-1-1 | 6.13 Requirements related to POTS transient effects | The test set-up is shown in figure 17. It consists of a switch with an on/off transition time less than 2 µs on the POTS port. The resistors RSOURCE are set at 1 kΩ. The DC source is set to 48 V. The signal V1 measured across the 1 000 Ω, due to each change of state of the switch S1, should be less than 2 V p-p and the... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 1 Scope | The present document specifies requirements and test methods for "ADSL over POTS" distributed filters. These filters at the user side of the local loop in the customer premise. NOTE: It is also recognized that distributed filters may be used in deployments where higher frequency services are present, such as home netwo... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 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. • ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 3 Definitions and abbreviations | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 3.1 Definitions | For the purposes of the present document, the following terms and definitions apply: A-wire and B-wire: wires in the 2-wire local loop connection provided from the exchange to the NTP active filters: filters whose filtering function is implemented using some active components, not including exclusively passive filter i... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 3.2 Abbreviations | For the purposes of the present document, the following abbreviations apply: AC Alternating Current ADSL Asymmetric Digital Subscriber Line CLI Caller Line Identification DTMF Dual Tone Multi-Frequency DC Direct Current DSL Digital Subscriber Line DUT Device Under Test HPF High Pass Filter ITU International Telecommuni... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 4.1 Functional diagram | The functional diagram for distributed filters is given in figure 1. The filters specified by the present document are intended to be connected only in series with the POTS TE. Operation is not specified for serial stacking (i.e. connecting one distributed filter in series with another distributed filter). ETSI ETSI TS... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5 Testing conditions | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.1 DC testing conditions | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.1.1 Polarity independence | The splitter shall conform to all the applicable requirements of the present document for both polarities of the DC line feeding voltage (and the DC line current) provided by the local exchange. This may not apply in the case where a "signature network" is used as this may be polarity dependant. |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.1.2 DC feeding conditions (on/off hook) | The electrical requirements in the present document can be classified as follows: • On-hook requirements, when the POTS terminal equipment is in the on-hook state. • Off-hook requirements, when the POTS terminal equipment is in the off-hook state. • Transitional requirements, when the POTS terminal equipment is in the ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.1.2.1 DC feeding for single state filters | On-hook voiceband electrical requirements shall be met with a DC feeding voltage of 50 V, and using the impedance model ZON, as given in clause 5.2.4. Additionally in certain networks there may be on-hook signalling requiring a DC loop current in the range of 0,4 mA to 2,5 mA flowing through the distributed filter. In ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.1.2.2 DC feeding for dual state filters | DC feeding for active splitters is specified in annex A. Due to the potential degradation in filter performance due to the loading effect of parallel filters, dual-state devices may be used (i.e. devices whose transfer characteristic depends on the state of the attached TE). For this reason the conditions of DC feeding... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.2 Terminating impedances | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.2.1 ZDSL-1 | In many of the tests with voice frequencies, an impedance called ZDSL-1is used. This impedance model represents the input impedance of the DSL transceiver (with the HPF), as seen from the low pass filter. This substitute circuit shown in figure 2 is a model which shall be applied to a distributed filter when verifying ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.2.2 ZR and ZSL | For most requirements relating to voice band frequencies described in the present document, either the terminating impedances ZR or ZSL is used to terminate the POTS port or the LINE port. ZR is the European harmonized complex impedance as defined in ES 201 970 [9] and TBR 21 [4], ZSL is an impedance used in TBR 038 [1... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.2.3 ZRHF | For requirements relating to ADSL frequencies described in the present document, the terminating impedance ZRHF is used to terminate POTS and LINE ports of the distributed filter. This is the European harmonized complex impedance ZR with the modification proposed in TR 102 139 [2]. This network is shown in figure 5. 15... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.2.4 ZON | For some on-hook requirements (as defined in clause 5.1.2) described in the present document, the terminating impedance ZON is used. This impedance is valid at AC frequencies only. Actual impedances will vary greatly especially over the ADSL frequency range and thus the impedance model adapted here is just intended for... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 5.3 General transmission test setup | For many of the transmission related tests that are specified in the present document, a common general test setup is valid. This test setup is given in figures 9 and 10, for measurements at the LINE port and POTS port respectively. The number of parallel filters to be used in the test setups is N-1. The maximum number... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6 Distributed filter requirements | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.1 Options for filter requirements | The electrical requirements in the present document are divided into two categories, Option A and Option B. In a practical sense, the requirements for Option A and Option B are identical with the exception of two clauses. The clauses in question are that specifying pass band return loss requirements in the off-hook sta... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.1.1 Option A distributed filters | • Option A filters will meet return loss requirements for two reference impedances, which is appropriate for networks where the population of existing terminals or network presentations includes equipment designed against several different reference impedance values. • Conversely, this option assumes that potential sid... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.1.2 Option B distributed filters | • Option B filters are considered to be appropriate to networks where concerns of sidetone and far end echo effects motivate a very high return loss requirement. • Additionally, this return loss requirement is only valid for one reference impedance, and thus Option B splitters are appropriate for networks for which it ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.2 DC requirements | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.2.1 DC resistance to earth | The DC resistance between each terminal (i.e. A-wire and B-wire) of the filter and earth, when tested with 100 V DC, shall not be less than 100 MΩ. This test should be performed while the filter is placed on an earthed metal plate of a sufficiently large size. |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.2.2 DC Insulation resistance between A-wire and B-wire | The DC resistance between the A-wire and B-wire at both the LINE and POTS port of the filter, when tested with 100 V DC, shall not be less than 25 MΩ. ETSI ETSI TS 101 952-1-5 V1.1.1 (2003-05) 14 |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.2.3 DC series resistance | The DC resistance from the A-wire to the B-wire at the LINE port with the POTS port shorted, or at the POTS port with the LINE port shorted shall be less than or equal to 50 Ω. This requirement is applicable to distributed filters that contain only passive circuitry. In the case of dual state filters, this requirement ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.2.4 DC signalling | The PSTN line typically may, according ES 201 970 [9], have 38 V to 78 V DC powering the analogue TE. When the POTS terminal is off hook, the voltage appearing across the splitter ports will normally be lower depending on the characteristics of the terminal and the line length. The splitter shall not significantly affe... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.3 Ringing frequency requirements | The DC feeding conditions of clause 5.1.2 are not applicable to these requirements. |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.3.1 Voltage drop at 25 Hz and 50 Hz | Ringing signals with frequencies of 25 Hz and 50 Hz shall be used. The maximum voltage drop at the load impedance due to the insertion of one filter, i.e. that marked "DUT" in the test setup of figure 7, shall be not more than 2 Vrms. This requirement is valid with the switch S in figure 7 both open and closed. Table 1... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.3.2 Impedance at 25 Hz and 50 Hz | The POTS port and the LINE port of the filter shall have an impedance (when measured between the A-wire and the B-wire) at 25 Hz and 50 Hz of not less than 40 kΩ. When testing at either the POTS port or the LINE port the other port is open circuit. ETSI ETSI TS 101 952-1-5 V1.1.1 (2003-05) 15 |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.3.3 Total harmonic distortion at 25 Hz and 50 Hz | The filter shall be able to transfer the ringing signals to the AC-load without significant distortion. This is tested with two sets of source and feeding voltages, as given in table 2. The test shall be carried out at 25 Hz and 50 Hz. With those voltages applied, the total harmonic distortion of the AC signal shall be... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.4 Pass band loss requirements (on-hook) | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.4.1 On hook requirement for the case of high impedance load | The magnitude of the voltage gain of the splitter in the range 200 Hz to 2 800 Hz shall be within the range -4 dB to +4 dB for the on-hook case with high impedance injection. The DC feeding shall be as specified in clause 5.1.2 for the on-hook case. The test set ups are given in figures 9 and 10. This requirement is va... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.4.2 On hook requirement for the case of low impedance load | The requirements of this clause are only applicable to certain networks. These networks use DTMF transmission as specified in annex A of ES 200 778-1 [11]. In this case , considering a number of parallel receivers, the equivalent AC impedance could be as low as 600 Ω. |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.4.2.1 On-hook insertion loss | The insertion loss of one splitter shall be less then 1 dB at 1 kHz for the on-hook case with low impedance injection. The on-hook pass band insertion loss shall be measured according to both figure 7. Both the source and load shall be set at 600 Ω. The DC feeding shall be as specified in clause 5.1.2 for the on-hook c... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.4.2.2 On-hook insertion loss distortion | The absolute difference between the insertion loss at any frequency in the range 200 Hz to 2 800 Hz and the insertion loss at 1 kHz shall be less then 1 dB. The on-hook pass band insertion loss distortion shall be measured according to both figure 7. Both the source and load shall be set at 600 Ω. The DC feeding shall ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.5 Pass band loss requirements (off-hook) | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.5.1 Off-hook pass band insertion loss | The insertion loss of one filter shall be less then 1 dB at 1 kHz. The test set ups are given in figures 9 and 10. The off-hook passband insertion loss shall be measured according to both figures 9 and 10. This requirement is valid with the switch S in figures 9 and 10 both open and closed. Level of the test signal = -... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.5.2 Off-hook passband insertion loss distortion | The absolute difference between the insertion loss at any frequency in the range 200 Hz to 4 000 Hz and the insertion loss at 1 kHz shall be less then 1 dB. The test shall be executed with both combinations of source and load impedances in table 4. The test setups are described in figures 9 and 10, the off-hook DC feed... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.6 Passband return loss requirements (off-hook) | The return loss at both the POTS and LINE port of the filter shall be measured according to figures 9 and 10. The definition of return loss for a single filter (for the case of a measurement at the POTS port) is given in figure 9. The return loss requirements are valid with the switch S in figures 9 and 10 both open an... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.6.1 Return loss requirements Options A and B | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.6.1.1 Return loss requirements, Option A | The device shall meet all the return loss requirements specified in table 5. NOTE: Option A is appropriate for networks where the population of existing terminals or network presentations includes equipment designed against several different reference impedance values (e.g. 600 Ω, harmonized European reference impedanc... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.6.1.2 Return loss requirements, Option B | The device shall meet the return loss requirements specified in figure 10. NOTE: Option B is appropriate for networks for which it is felt that one single reference impedance is sufficient to accommodate the needs of all terminals and network presentations. Minimum Return Loss 300 500 2 000 3 400 db Hz 18 14 Frequency ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.8 Unbalance about Earth | The basic test setup for measuring unbalance at the POTS port is shown in figure 11. In the case of measuring at the LINE port, the test setup of figure 11 is used, however with the POTS and LINE terminations reversed. The test shall be carried out for the combinations described in table 7. Note that the source and mea... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.9 ADSL band requirements | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.9.1 On-hook loss | The on-hook DC feeding conditions are specified in clause 5.1.2. Table 9: Isolation, minimum values Frequency range Minimum value 32 kHz to 350 kHz 34 dB 350 kHz to 1 104 kHz 55 dB The test setup is given in figure 12. - Impedance of signal source = ZRHF; - Impedance of the load = ZON; - Level of the test signal = -6,0... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.9.2 Off-hook isolation | In the case where the return loss requirement of Option A (see clause 6.6.1.1) is used in specifying the filter, the off-hook isolation requirement of table 10 shall be fulfilled. In the case where the return loss requirement of Option B (see clause 6.6.1.2) is used in specifying the filter, the off-hook isolation requ... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.9.3 Line side impedance | The low pass filter should present an impedance to the line side of at least 1 000 Ω for the frequency range 32 kHz to 1 104 kHz. This requirement should apply with the POTS port terminated in ZRHF. NOTE: In the case where the filter is to be used with high frequency services such as home networking signals or VDSL, th... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.10 Noise | The noise requirements of clause 6.10.1 are valid for the off-hook condition. The noise requirements of clause 6.10.2 are valid for both the on-hook and off-hook condition. The DC feeding conditions are given in clause 5.1.2. |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.10.1 Audible noise level | The psophometric noise power, as defined in ITU-T Recommendation O.41 [6], measured at the LINE port and the POTS port of a filter, shall be less than -75 dBmp. The psophometer shall be referenced to ZR. LINE port and POTS port should be terminated with ZR. |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.10.2 ADSL band noise level | The noise in the frequency range 26 kHz to 1 104 kHz due to the filter, measured at the LINE port, should be less than -140 dBm/Hz measured in a bandwidth of 10 kHz. NOTE: In the case where the filter is to be used with high frequency services such as home networking signals or VDSL, the noise requirement of clause 6.1... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.11 Distortion | |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.11.1 POTS band intermodulation distortion | The test setup to be used is given in figure 7. This requirement is valid with the switch S in figure 7 both open and closed. Both the source and load impedance used shall be equivalent to ZR. This requirement is valid for both the on- hook and off hook conditions. The DC feeding conditions are given in clause 5.1.2. T... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.12 Group delay distortion | The increase of the group delay distortion by inserting one filter shall be less than the figures in table 12, relative to the lowest measured delay in the frequency range 300 Hz to 4 000 Hz. Table 12: Group delay distortion, maximum values Frequency range Maximum value 200 Hz to 600 Hz 250 µs 600 Hz to 3 200 Hz 200 µs... |
0af450399f066a4afad5f48f72d5df3d | 101 952-1-5 | 6.13 Requirements related to POTS transient effects | The test setup is shown in figure 14. It consists of a switch with an on/off transition time less than 2 µs on the POTS port. The resistors RSOURCE are set at 1 kΩ. The DC source is set to 48 V. The signal V1 measured across the 1 000 Ω, due to each change of state of the switch S1, should be less than 2 V p-p and the ... |
2e2937f9853adf2a211b895bfd8ca598 | 125 215 | 1 Scope | ........................................................................................................................................................5 |
2e2937f9853adf2a211b895bfd8ca598 | 125 215 | 2 References | ................................................................................................................................................5 |
2e2937f9853adf2a211b895bfd8ca598 | 125 215 | 3 Abbreviations | ...........................................................................................................................................5 4 Control of UE/UTRAN measurements....................................................................................................6 |
2e2937f9853adf2a211b895bfd8ca598 | 125 215 | 5 Measurement abilities for UTRA FDD | ....................................................................................................6 |
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