WO2011116928A1 - Vorrichtung zur auskopplung eines auf einer datenübertragungsleitung übertragenen hochfrequenzsignals - Google Patents
Vorrichtung zur auskopplung eines auf einer datenübertragungsleitung übertragenen hochfrequenzsignals Download PDFInfo
- Publication number
- WO2011116928A1 WO2011116928A1 PCT/EP2011/001407 EP2011001407W WO2011116928A1 WO 2011116928 A1 WO2011116928 A1 WO 2011116928A1 EP 2011001407 W EP2011001407 W EP 2011001407W WO 2011116928 A1 WO2011116928 A1 WO 2011116928A1
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- WO
- WIPO (PCT)
- Prior art keywords
- data transmission
- line
- transmission line
- sub
- frequency signal
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2209—Arrangements for supervision, monitoring or testing for lines also used for data transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2203/00—Aspects of automatic or semi-automatic exchanges
- H04M2203/05—Aspects of automatic or semi-automatic exchanges related to OAM&P
- H04M2203/056—Aspects of automatic or semi-automatic exchanges related to OAM&P non-invasive testing, i.e. in operation testing without service interruption
Definitions
- the present invention relates to a device for decoupling a radio frequency signal transmitted on a data transmission line or of
- Interference voltages in particular for the purpose of carrying out a measurement on the permanently installed data transmission line.
- Data transmission lines are now installed in millions of execution, for example, for the supply of
- Power density often the need for the measurement of a given data transmission line to be performed the same separately, i. has to be interrupted.
- the invention has for its object to provide a device for decoupling a transmitted on a data transmission line high-frequency signal or interference voltages, which avoids the disadvantages of the prior art, or at least reduced and constructed easily and inexpensively
- CONFIRMATION COPY and can be produced and used in a simple and efficient manner in test practice.
- This object is achieved by a device for decoupling a on a first part of a line and a second part line having
- the device has a tapping module and a current clamp module, wherein for coupling the high-frequency signal, a connection of the tapping module is provided to the first and second sub-line at a first Abgreifort the data transmission line and wherein for coupling the high-frequency signal is a coupling of the
- the device according to the invention has the advantage that, in contrast to a conventional directional coupler in the closed design an uninterrupted measurement or measurement of the data transmission line is possible. On the one hand, this has the advantage that, for carrying out the measurement, the one to be measured
- the device can be used both for measuring a high-frequency signal and for measuring
- Interference voltages on the data transmission line.
- the device for decoupling the high-frequency signal is operated in a so-called push-pull mode (differential mode) and for decoupling the interference voltages in a so-called common mode (common mode).
- the two operating modes or tapping modes differ essentially only by the different handling or the different tap.
- the radio frequency signals to be transmitted on the data transmission line i.e., the wanted signals, for example, xDSL signals
- the wanted signals for example, xDSL signals
- the device according to the invention is used in push-pull operation. With the help of this measurement, the xDSL transmission power coupled into a cable should be measured as accurately as possible. In a preferred embodiment, due to the Richtkoppler Basil the
- Signal direction of the xDSL signal can be determined by means of a switch.
- Data transmission line usually a double wire or a
- the interference potential on both sub-lines to ground of the data transmission line is the same; for common mode, one can think of the data transmission line as a single line (or the two sub-lines as a single line).
- the common mode operation is used.
- the fundamentally unknown signal direction of the interference signal should be determined primarily for locating the jamming transmitter.
- the device is similar in common mode operation Accuracy of measurement can ensure as with push-pull operation, the absolute measurement accuracy plays in the location of the source of interference is not crucial.
- the device according to the invention is used as a directional coupler and is connected to the decoupled on the usually fixed data transmission line transmitted high frequency signal or to decoupling interference voltages to the data transmission line, but made no change to the predetermined configuration of the installation of the data transmission due to the implementation of the measurement becomes.
- the device according to the invention comprises two modules or measuring modules, which are preferably matched to one another and together accomplish the decoupling of the radio-frequency signal transmitted on the signal transmission line to be measured.
- the present invention is primarily based on the example of the decoupling of a
- the invention can also be applied to other types of data transmission line, for example comprising more than two sub-lines and / or comprising others
- the two modules or measuring modules in the device according to the invention are a tapping module and a current clamp module.
- the tapping module is for tapping i.e.. the voltage tap
- the current clamp module serves for coupling to a second pickup location along the extension of the data transmission line, namely
- the device serves, in particular, to carry out measurements of the spectral power density of the data transmission line or the execution of
- Measurements for locating sources of interference provision is made in particular for an additional device for completely carrying out such a measurement to be connected to an output of the device according to the invention.
- a further device is in particular a so-called spectrum analyzer in question, which makes only the actual measurement of the spectral power density.
- the device according to the invention provides the measurement signal to such a spectrum analyzer, i. the measuring accuracy of
- the measurement carried out is sensitively dependent on the device according to the invention, which serves as a measuring head for the spectrum analyzer in such a measuring setup and is therefore also referred to below as a contact power measuring head.
- the current clamp module has a divided toroidal magnet. In this way, a particularly simple and accurate measurement of the current flow through the first sub-line of the data transmission line can be made in an advantageous manner.
- a coupling of the current clamp module (30) to the first and second sub-line (51, 52) is provided such that the current clamp module (30) the first and second sub-line (51, 52) in the same direction encompasses.
- the tapping module is designed as a probe with a first pick-off element and a second pick-off element.
- the measurement can be carried out quickly and easily in an advantageous manner.
- the device is configured such that the first and the second picking location of 2 cm to 200 cm, preferably from 5 cm to 50 cm, more preferably from 8 cm to 15 cm, most preferably 10 cm from each other are removed. This distance between the first picking location and the second picking location relates in particular to the distance of the picking locations along the extent of the data transmission line.
- the device it is also preferable for the device to have a
- Tapping module with the first sub-line and an electrically conductive connection of the second tapping element with the second sub-line (in the case of decoupling the high frequency signal, i.e. the operation of the device in push-pull operation), a changeover of the changeover switch, a port configuration of
- the Device to the sub-lines of the data transmission line thus causes as if the first pick-off element would have an electrically conductive connection to the second sub-line and the second pick-off element an electrically conductive connection to the first sub-line. Accordingly, in the case of an electrically conductive connection of the first pick-off element (of the pick-off module) to the first and second part line and an electrically conductive connection of the second one
- Tapping element to ground (the data transmission line) (in the case of coupling out interference voltages, ie the operation of the device in common mode operation) switching the changeover switch causes a connection configuration of the device to the sub-lines of the data transmission line, as if the first tapping element is an electrically conductive connection to ground and the second pick-off element would have an electrically conductive connection with the first and second sub-lines.
- Clamp module must be made due to incorrect polarity, but only the changeover switch must be operated. This speeds up the performance of the measurement and, moreover, improves the measurement accuracy, because with the same pickup configuration (i.e., the possibility of a good match to the impedance ratios), the measurement can also be performed without interchanging the tap on the first and second sub-lines
- the device has a decoupling attenuation of 40 dB +/- 0.1 dB of 30 kHz to 30 MHz.
- a connected spectrum analyzer is not overdriven. Due to the high linearity of the device according to the invention of +/- 0.1 dB in the frequency range of 30 kHz to 30 MHz on a conventional copper double-core impedance of
- the device has an output, wherein the output is adaptable to different input impedances of a device connected to the output. In this way, a very accurate and reliable measurement result of the measurement can be obtained on the data transmission line in an advantageous manner.
- the device be measured in copper double-core networks (i.e.
- Copper double conductors or copper double wires as data transmission lines in the sense of the present invention with a usual mean impedance of 135 ⁇ in conjunction with commercially available and suitable (and sufficiently accurate), usually portable and operated with an accumulator spectrum analyzers with symmetrical receiver input with an input or measuring impedance R m from about 100 ⁇ to about 150 ⁇ is operated.
- the inventive Device also on other than here only by way of example (the example of the typical impedance ratios of (installed in Germany)
- Impedance ratios or frequency ranges are optimized or adapted to achieve the same advantages of the invention, namely a simple, fast and at the same time comparatively highly accurate line measurement.
- Another object of the present invention relates to a
- the data transmission line can be used without interruption during data transmission for carrying out the measurement. This is a significant advantage, which not only makes the implementation of the method simpler and faster, but at the same time more accurate, because it is measured on the same (or unchanged) line configuration that is also used for data transmission.
- a copper double cable preferably a twisted copper double cable, is used as the data transmission line and / or that a spectrum analyzer for measuring the spectral power density of the radio frequency signal transmitted on the data transmission line or for measuring interference voltages is connected to the device and / or or that the device is adapted to different input impedances of the spectrum analyzer.
- a further subject of the present invention relates to a method for carrying out a measurement on a data transmission line provided for transmitting a high-frequency signal and comprising a first sub-line and a second sub-line, wherein a device for decoupling the
- High-frequency signal comprises a tapping module and a current clamp module, wherein for coupling the high-frequency signal, the tapping module is connected to the first and second sub-line at a first Abgreifort the data transmission line and wherein for decoupling the high-frequency signal, the current clamp module to the first sub-line at a second Abgreifort the data transmission line is coupled.
- Another object of the present invention relates to a method for performing a measurement at a for the transmission of a
- High-frequency signal provided and a first sub-line (51) and a second sub-line (52) comprising data transmission line (50), wherein a device (10) for decoupling the high-frequency signal, a tapping module (20) and a current clamp module (30), wherein for decoupling the high-frequency signal the tapping module (20) is connected to the first and second sub-lines (51, 52) at a first pick-up location (61) of the data transmission line (50), and wherein
- a spectrum analyzer for measuring the spectral power density of the transmitted on the data transmission line high-frequency signal or noise voltages is connected to the device, wherein an output of the device is adapted to different input impedances of the spectrum analyzer.
- Figure 1 shows a schematic representation in the sense of a block diagram of a device according to the invention, which is used for coupling one on one
- FIG. 1 shows a schematic representation of the device according to the invention for decoupling the high-frequency signal with respect to the figure 1 larger
- FIG. 3 schematically shows an equivalent circuit diagram of the device according to the invention in use according to FIG. 2.
- Figure 4 shows a schematic representation of the device according to the invention for decoupling the interference voltages with respect to the figure 1 greater detail.
- FIG. 5 schematically shows an equivalent circuit diagram of the device according to the invention in use according to FIG. 4.
- FIG. 1 a device 10 according to the invention for decoupling a high-frequency signal transmitted on a data transmission line 50 is shown schematically in the form of a block diagram. The illustrated part of
- data transmission line 50 is usually only a (small) part of the extension of the data transmission line 50. Die
- the Device 10 has a tapping module 20 and a current clamp module 30.
- the tapping module 20 is connected to the data transmission line 50 at a first tapping point 61.
- the current clamp module 30 is connected to the data transmission line 50 at a second pickup location 62.
- the data transmission line 50 has a first sub-line 51 and a second sub-line 52, which are preferably provided as twisted sub-lines 51, 52 of a copper double conductor (or copper double conductor). Between the first pickup location 61 and the second pickup location 62 is a distance along the extension of the data transmission line 50
- the distance between the first picking location 61 and the second picking location 62 is according to the invention preferably from about 2 cm to about 200 cm, more preferably from about 5 cm to about 50 cm, most preferably from about 8 cm to about 15 cm and even more preferably about 10 centimeters.
- FIG. 2 shows the operation of the device 10 according to the invention for decoupling the high-frequency signal (ie the push-pull operation), while in FIG. 4 the operation of the device 10 according to the invention for the extraction of interference signals or interference voltages (ie, the common mode operation) is shown.
- FIG. 2 shows a schematic representation of the device 10 according to the invention for decoupling the high-frequency signal is shown with respect to the figure 1 greater detail.
- the device 10 is shown with its pickup module 20 and its current clamp module 30.
- the illustrated part of the data transmission line 50 only corresponds to a (small) part of the extent of the data transmission line 50.
- the tapping module 20 preferably has a first pick-off element 21 and a second pick-off element 22.
- the current clamp module 30 preferably has a toroidal magnet 31, by means of which (via the measurement of the magnetic flux) the current flow through one of the partial lines 51, 52 of the data transmission line 50 can be measured.
- the second Abgreifort 62 surrounds the toroidal magnet 31 of the
- the current clamp module 30 is coupled to the first partial line 51 or to the first partial line 51 (at the second tap location 62) and the first tap element 21 is connected to the first partial line 51 and the second tap element 22 is connected to the second partial line 52 (FIG. at the first pickup location 61).
- the device 10 according to the invention has an output 14, to which preferably a spectrum analyzer 40 can be connected, in particular if the spectral power density of the radio-frequency signal transmitted on the data transmission line 50 is to be measured.
- the high-frequency signal propagates according to the propagation direction 55 (i.e., in the left-to-right illustration).
- the first sub-line 51 corresponds to the a-wire of the data transmission line 50.
- the second sub-line 52 corresponds to the b-wire of the data transmission line 50. It is, for example, the (from a signal providing device not shown) in the
- Data transmission line 50 coupled power P 0 (or spectral
- Current clamp module 30 preferably has a secondary turn 32 around the cross section of the toroidal magnet 31, by means of which the current Is (current clamp module current) is generated or in which the current Is is induced.
- the current Is current clamp module current
- the tapping module 20 By means of the tapping module 20, the voltage U 0 between the sub-lines 51, 52 is tapped, which causes a current IT (tapping modulus current) in the device 10.
- Directional coupler function of the device 10 according to the invention is the coming from the left high frequency signal (send signal) to the output 14 of the device
- the data transmission line 50 has an impedance of Z.
- the measuring voltage U M At the output 14 of the device 10 is the measuring voltage U M , the measuring current I and the power P M for further processing by the spectrum analyzer 40 at.
- the measuring current I corresponds to the (complex addition) of Is and I T.
- the device 10 is a changeover switch
- Data transmission line 50 thus acts as if the first pickup element 21 to the second sub-line 52 and the second pick-off element 22 would be connected to the first sub-line 51. It can thereby be the sign of U 0 and thus switched from l T.
- ⁇ and ls just cancel (ie they interfere destructively).
- the device 10 gives the function of a directional coupler.
- FIG. 3 schematically shows an equivalent circuit diagram of the device 10 according to the invention during use according to FIG.
- a not specifically shown or named printed circuit board or board, for example, in the current clamp module 30 (for example, in a simultaneously used to open and close the ring magnet 31 used handle of the current clamp module housed) has various circuit elements, which are explained in more detail below.
- Iso results in Iso U 0 / (N ⁇ Z)
- ie U T corresponds to Uo divided by the product of the number of turns of the secondary winding 32 (or the turns ratio of primary and secondary windings 31, 32) and of the
- a potentiometer P1 (for example, 500 ⁇ ) is used for exact
- Another potentiometer P2 (for example 5 kü) is used to adjust the measuring voltage U M , in particular to 40 dB coupling loss.
- the measurement voltage U M drops above the input resistance RM (for example, 135 ⁇ ) of the spectrum analyzer 40.
- the changeover switch 11 is shown in FIG. 3 and serves to interchange the polarity of the probe current (or the tapping module current).
- Tapping module cable 25 (also called probe cable), for example, 40 cm long and has a very high wave impedance, so that the current clamp module current l s primarily via the input resistance R M of the spectrum analyzer 40 flows.
- the tapping module 20 preferably comprises the tapping module cable 25 and a tapping module unit 26, which has the components R1, C1 and C2 as well as test probes.
- the tapping module unit 26 is preferably fixedly connected to the tapping module cable 25.
- the capacitance C1 is used for DC decoupling of the Abgreifmodstromstrom ⁇ - the probe resistance R1 (for example, each (ie
- Power resistor Z (the data transmission line 50), which is on average for example at 135 ⁇ .
- a variable capacitance C2 (for example 0 to 2 pF) causes an optionally required phase rotation by means of insulated wires twisted over a length of about 1 to 4 cm for additional balancing of the phases of the two currents ls and ⁇ (so that with a good balance Difference of ls and I T approximately disappears, ie approximately equal to 0).
- C2 is according to the invention, for example, to the length of the Abgreifmodultivs 25 (for example, 40 cm) and the distance between the first and the second Abgreifort 61, 62nd
- C2 can not usually use one
- Trimmkondensators be adjusted to the required amount, because often its minimum amount is too high (for example, 1, 5 to 5.5 pF).
- the toroidal magnet 31 is, in particular, a hinged toroidal magnet which can be opened by means of an actuation of a tong device 35 (see FIG. 2) of the current clamp module 30.
- FIG. 4 shows a schematic representation of the device 10 according to the invention for coupling out the interference voltages.
- the device 10 is shown with its pickup module 20 and its current clamp module 30.
- the illustrated portion of the data transmission line 50 corresponds to only one (small) part of the extension of the data transmission line 50.
- the tapping module 20 preferably has the first tapping element 21 and the second tapping element 22. By means of the tapping elements 21, 22, it is possible to realize an electrically conductive connection (in the sense of measuring electrodes) on the one hand to the partial lines 51, 52 and on the other hand to the ground of the data transmission line 50 at the first tapping point 61.
- the current clamp module 30 preferably has a toroidal magnet 31, by means of which (via the measurement of the magnetic flux) the current flow through both sub-lines 51, 52 of the data transmission line 50 can be measured, the two sub-lines 51, 52 in the same direction from the toroidal magnet 31 at the second pick-off location 62 be enclosed.
- the first pick-off element 21 is connected to the ground of the data transmission line 50 and the second pick-off element 22 is connected to the first and second sub-lines 51, 52 (at the first pick-up point 61).
- Device 10 has an output 14, to which preferably a spectrum analyzer 40 can be connected, in particular if the interference signal on the data transmission line 50 is to be measured.
- the first sub-line 51 corresponds to the a-wire of the data transmission line 50.
- the second sub-line 52 corresponds to the b-wire of the data transmission line 50.
- Current probe module 30 preferably has a secondary winding 32 around the cross-section of the toroidal magnet 31, by means of which the current ls (current probe module current) is generated and in which the current l s is induced.
- the tapping module 20 By means of the tapping module 20, the voltage UCM between on the one hand the two sub-lines 51, 52 and on the other hand, the mass of the data transmission line 50 is tapped, which causes a current I T (tapping module current) in the device 10.
- the noise signal coming from the left is coupled to the output 14 of the device 10, with ls and ⁇ mutually reinforcing (constructive interference).
- a high-frequency signal coming from the right is largely suppressed (destructive Interference of l s and l T ). If the tapping elements 21, 22 reversed, this situation is reversed.
- the data transmission line 50 has an impedance of Z.
- the measuring voltage U M At the output 14 of the device 10 is the measuring voltage U M , the measuring current IM and the power P M for further processing by the spectrum analyzer 40 at.
- the measuring current I corresponds to the (complex addition) of Is and
- the device 10 has a changeover switch 11 (cf., FIG. 5), wherein the changeover switch 11 brings about a circuit-related permutation of the pick-off elements 21, 22 of the pick-off module 20.
- the changeover switch 11 brings about a circuit-related permutation of the pick-off elements 21, 22 of the pick-off module 20.
- constructive interference i. an overlay and IM equals the sum of ls and it.
- FIG. 5 schematically shows an equivalent circuit diagram of the device 10 according to the invention during use according to FIG.
- a not specifically shown or named printed circuit board or board, for example, in the current clamp module 30 (for example, in a simultaneously used to open and close the ring magnet 31 used handle of the current clamp module housed) has various circuit elements that the circuit elements according to the Figure description of Figure 3 correspond. Below, only the differences are explained in more detail.
- the tapping module 20 preferably comprises the tapping module cable 25 and a tapping module unit 26, which has the components R1, R1 / 2, C1 and L1 and test probes.
- the tapping module unit 26 is preferably fixedly connected to the tapping module cable 25.
- the capacitance C1 is used for DC decoupling of the Abgreifmodernstrom l T.
- the probe resistance R1 (for example, in each case (ie twice) 9300 ⁇ ) is used for high-impedance connection to U C M above the
- Line wave resistance ZC M (the data transmission line 50), which is on average, for example, 55 to 60 ⁇ .
- An inductance L1 is bifilar for the common mode current I C , but suppresses the flow of the basically existing one
- L1 is additionally connected in series with the two resistors R1.
- the resistance R1 / 2 corresponds for example to a value of 4650 ⁇ .
- the toroidal magnet 31 is, in particular, a hinged toroidal magnet which can be opened by means of an actuation of a tong device 35 (see FIG. 2) of the current clamp module 30.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Measuring Leads Or Probes (AREA)
- Tests Of Electronic Circuits (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013501668A JP5788964B2 (ja) | 2010-03-26 | 2011-03-22 | データ伝送線路上で伝送される無線周波数信号をデカップリングするための装置 |
US13/637,475 US8836320B2 (en) | 2010-03-26 | 2011-03-22 | Apparatus for decoupling a radio-frequency signal transmitted on a data transmission line |
EP11714687.8A EP2553822B1 (de) | 2010-03-26 | 2011-03-22 | Vorrichtung zur Auskopplung eines auf einer Datenübertragungsleitung übertragenen Hochfrequenzsignals |
CA2793901A CA2793901C (en) | 2010-03-26 | 2011-03-22 | Apparatus for decoupling a radio-frequency signal transmitted on a data transmission line |
IL222039A IL222039A (en) | 2010-03-26 | 2012-09-20 | Radio frequency signal separation system transmitted on a data transmission line |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10003252 | 2010-03-26 | ||
EP10003252.3 | 2010-03-26 | ||
EP10008666 | 2010-08-19 | ||
EP10008666.9 | 2010-08-19 |
Publications (1)
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WO2011116928A1 true WO2011116928A1 (de) | 2011-09-29 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/EP2011/001407 WO2011116928A1 (de) | 2010-03-26 | 2011-03-22 | Vorrichtung zur auskopplung eines auf einer datenübertragungsleitung übertragenen hochfrequenzsignals |
Country Status (6)
Country | Link |
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US (1) | US8836320B2 (de) |
EP (1) | EP2553822B1 (de) |
JP (1) | JP5788964B2 (de) |
CA (1) | CA2793901C (de) |
IL (1) | IL222039A (de) |
WO (1) | WO2011116928A1 (de) |
Cited By (1)
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DE102013220155A1 (de) * | 2012-10-05 | 2014-04-10 | Ifm Electronic Gmbh | Auskoppeleinheit für einen Zweileiter-Feldbus zum Lesen von Bustelegrammen |
Families Citing this family (2)
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US20140132282A1 (en) * | 2011-07-01 | 2014-05-15 | Telefonaktiebolaget L M Ericsson (Publ) | Device and method for emi source location |
EP2961076A1 (de) * | 2014-06-27 | 2015-12-30 | Orange | Vorrichtung zur Ermöglichung der Messung der Übertragungsleistungsspektrumsdichte eines Sende- und Empfangsgerätes in einem DSL-System |
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JP3131857B2 (ja) * | 1993-01-19 | 2001-02-05 | 日本電信電話株式会社 | 擬似通信回路網 |
JPH10185962A (ja) * | 1996-10-31 | 1998-07-14 | Sony Corp | 電流検出装置 |
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CN1762097B (zh) * | 2003-03-14 | 2010-10-13 | 株式会社Ntt都科摩 | 匹配电路和包括匹配电路的功率放大器 |
JP4838536B2 (ja) * | 2005-05-20 | 2011-12-14 | 株式会社エヌ・ティ・ティ・ドコモ | 整合回路 |
JP2007120956A (ja) * | 2005-10-25 | 2007-05-17 | Eicon Denshi Kk | 電子機器動作検出装置 |
KR100663574B1 (ko) * | 2006-02-06 | 2007-01-02 | 삼성전자주식회사 | 이동통신 단말기에서 안테나의 임피던스 변화에 따른 rf성능 열화를 방지하기 위한 장치 및 방법 |
US20080309349A1 (en) * | 2007-06-15 | 2008-12-18 | Computer Access Technology Corporation | Flexible interposer system |
WO2009099082A1 (ja) * | 2008-02-06 | 2009-08-13 | Mitsubishi Electric Corporation | 電力計測システムおよび計測装置および負荷端末および機器制御システム |
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2011
- 2011-03-22 JP JP2013501668A patent/JP5788964B2/ja active Active
- 2011-03-22 US US13/637,475 patent/US8836320B2/en active Active
- 2011-03-22 CA CA2793901A patent/CA2793901C/en active Active
- 2011-03-22 WO PCT/EP2011/001407 patent/WO2011116928A1/de active Application Filing
- 2011-03-22 EP EP11714687.8A patent/EP2553822B1/de active Active
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2012
- 2012-09-20 IL IL222039A patent/IL222039A/en active IP Right Grant
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US6624721B1 (en) * | 2000-10-13 | 2003-09-23 | Tektronix, Inc. | Apparatus for acquiring a signal from an intermediate point on a series impedance source terminated unidirectional transmission line |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013220155A1 (de) * | 2012-10-05 | 2014-04-10 | Ifm Electronic Gmbh | Auskoppeleinheit für einen Zweileiter-Feldbus zum Lesen von Bustelegrammen |
DE102013220155B4 (de) * | 2012-10-05 | 2021-03-04 | Ifm Electronic Gmbh | Auskoppeleinheit für einen Zweileiter-Feldbus zum Lesen von Bustelegrammen |
Also Published As
Publication number | Publication date |
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EP2553822B1 (de) | 2017-07-05 |
US20130077667A1 (en) | 2013-03-28 |
JP5788964B2 (ja) | 2015-10-07 |
JP2013528965A (ja) | 2013-07-11 |
US8836320B2 (en) | 2014-09-16 |
CA2793901A1 (en) | 2011-09-29 |
EP2553822A1 (de) | 2013-02-06 |
CA2793901C (en) | 2017-01-17 |
IL222039A (en) | 2016-06-30 |
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