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Transmission LIne
See Also: Transmission Line Pulse
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Transmission Line Probes
Transmission line probes are a special type of passive probe designed for use at very high frequencies. They replace the high impedance probe cable found in a traditional passive probe with a precision transmission line, with a characteristic impedance that matches the oscilloscope input (50 Ohm). This greatly reduces the input capacitance to a fraction of a picofarad, minimizing the loading of high frequency signals. A matching network at the tip increases the DC input resistance. While they have lower DC input resistance than a traditional passive probe (usually 500 Ohm) to 1kOhm), the input impedance of these probes remains nearly constant over their entire frequency range. A traditional /10 passive probe will have a 10 MOhm) input impedance at DC, however this impedance drops rapidly with frequency, passing below the input impedance of a transmission line probe at less than 100 MHz.
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Transmission Line Pulse Testing
Transmission Line Pulse testing, or TLP testing, is a method for semiconductor characterization of Electrostatic Discharge (ESD) protection structures. In the Transmission Line Pulse test, high current pulses are applied to the pin under test (PUT) at successively higher levels through a coaxial cable of specified length. The applied pulses are of a current amplitude and duration representative of the Human Body Model (HBM) event (or a Charged Device Model – CDM – event in the case of Very Fast TLP, or VF-TLP).
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Transmission Line Testers
GAOTek provides affordable, safe and reliable transmission line testers, digital clamp meters and power meters for sale to the United States, Canada and Globally. A transmission line is a specialized cable designed to conduct alternative current of radio frequency. Transmission lines are used for connecting radio transmitters and receivers with their antenna to distribute signals.
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PCB Transmission Line Field Solver
Si9000e
With its fast, accurate, frequency-dependent transmission line modelling, the new Si9000e is designed to model transmission line loss, impedance at given frequencies and extract full transmission line parameters over a wide range of popular PCB transmission lines (over 90 structures).
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TDR Structural Health Monitoring
Material Sensing & Instrumentation
MSI Time-Domain-Reflectometry (TDR) Structural-Health Monitoring probes the structural health of a composite part by propagating a fast electrical pulse along a distributed linear sensor which has been fabricated directly in the laminate. The sensor is formed from the native graphite fibers already used in composite manufacture, and constitutes zero defect. Fibers are patterned into a microwave waveguide geometry, or transmission line, and interrogated by a rapid pulse as shown below. Structural faults along the line cause distortions in waveguide geometry, producing reflected pulses similar to radar. Cracking, delamination, disbonds, moisture penetration, marcelling, and strain are all detected by propagation delay, for sensor lengths up to several meters.
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Teleprotection
Schweitzer Engineering Laboratories, Inc.
Teleprotection systems monitor and protect transmission lines using communications-assisted coordination between relays.
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Traveling Wave Fault Locator
XC-2100E
XC 2100E, a Fault Location System based on principle of travelling wave detection is the solution to above problem. It can detect not only permanent fault, but also transient fault within one tower span accuracy (with best accuracy of ±50 meters). It is a kind of Line Monitor for continuous monitoring of transmission lines and gets triggered whenever travelling waves are generated on line due to switching, lightening or fault.
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Broadband, Multirange Directional RF Wattmeter
81060
With the Model 81060 Directional Wattmeter you can now measure RF power in 50-Ohm coaxial cable and transmission lines without the need for additional plug-in elements.
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Advanced Line Protection System
ALPS
ALPS is a multi-function digital protective relay system intended toprovide distance protection for HV or EHV transmission lines. It maybe applied on or adjacent to series compensated lines. It is availablefor single or three phase tripping applications. Typical operatingtimes are to 1 cycle.
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RF Terminators
Typically placed at the end of a transmission line and is designed to match the cable's AC impedance.
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Air Core Shunt Reactors
Shunt Reactors act as absorbers of reactive power to increase energy efficiency of the power system. Shunt Reactors are inductors that are used in order to compensate capacitive reactive power generated by long and lightly loaded transmission lines as well as underground cables, thus allowing the flow of more active power through the system and avoiding over voltages. The shunt reactors provide inductive compensation.
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Transmission Line Parameter Test System
HTXL-Y / 421
Wuhan Huatian Electric Power Automation Co., Ltd.
Field test of various high-voltage transmission line power frequency parameters of high-precision test instruments.
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High-Power Directional RF Wattmeters
81600-A Series
The 81600-A series of High-Power Directional RF Wattmeters are designed to measure RF power in 50-Ohm 6-1/8 inch coaxial transmission lines. The RF power is directly displayed on the 4-1/2 inch triple scale meter.
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Wattchman RF Station Monitor/Alarm Systems
81090
The Coaxial Dynamics Wattchman Monitor/Alarm measures forward and reflected RF power simultaneously in 50-Ohm coaxial cables and transmission lines. It is compatible with our entire series of 7/8" through 6-1/8" Line Sections and will accept plug-in elements that range from 5 watts to 100 kW full scale from 0.45 MHz to 2300 MHz.
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Electro Mechanical Solenoid Switch
Electro Mechanical Solenoid Switches are a type of switch that are used in applications that require remote-controlled or timed transmission line switching. These switches are very useful in operational systems and test setups where they supply a variety of switching combinations.View more Electro Mechanical Solenoid Switch
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Pulse generator
9355-1
Solar Model 9355-1 Pulse Generator is designed to provide impulse excitation by means of an injection probe placed around interconnecting cables or power wires. The unit uses a charged transmission line (50 ohms) to generate a pulse with less than 2 nanoseconds rise and fall time, and duration of approximately 30 nS, calibrated in a 50 ohm fixture to deliver up to 5 amperes at a rate of 30 p.p.s. for one minute as required by MIL-STD-461D/E, test method CS115.
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Protection Device Testing
The Motwane Manufacturing Company
Power system protection is a branch of electrical power engineering that focuses on protecting electrical power systems to detect and isolate faulty parts. The objective is to keep the power system stable by separating only the defective components while keeping the rest of the network in operation. The device protects the transmission lines, generator transformer, and other electrical apparatus from multiple faults.
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LXI 2.4GHz 50ohm 16x8 Matrix
60-771-003
The 60-771 is a family of integrated RF matrices suitable for use up to 2.4GHz in a 50 ohm transmission line system. The matrix design permits any single Y input to be connected to any single X input, permitting the concurrent connection of 8 RF paths. All signal paths are bi-directional permitting any connection to be used as an input or an output.
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Fault Locating
Schweitzer Engineering Laboratories, Inc.
The built-in fault-locating methods in SEL devices allow you to quickly identify faults, dispatch crews for repairs, and restore service faster. Traveling-wave fault-locating technology calculates the locations of temporary and permanent faults by measuring the arrival times of the naturally occurring traveling waves caused by a transmission line fault. Accurately detecting these waves requires ultra-high-resolution monitoring, and locating is accurate to within one tower span (±300 m). Impedance-based fault-locating technology calculates fault locations by detecting changes in line impedance as a result of a fault. Impedance-based locating is reliable and accurate to about 2 percent of a line’s total length.
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Thyristor Surge Suppressor (TSS)
When protecting parallel (double) circuit transmission lines, devices have two main functions in transient mode: clipping the voltage and drifting the current due to overload.
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Transmission Line/Cable Testing
HAOMAI Electric Test Equipment Co., Ltd.
Transmission Line/Cable Testing products by Haomai
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Balanced Measurements
The unbalanced interface of a VNA is not very well suited for measuring balanced circuits like antennas, transmission lines or chip impedances. In fact it is nearly impossible to get a decent calibration on a balanced 2-port measurement using coax cables.
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SWR / Power Meters
A device used primarily by radio operators to measure the Standing Wave Ratio (SWR) and forward and reflected power in a transmission line, like a coaxial cable.
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Impedance Measurement
CITS880s
Finer geometries and thinner copper can present a challenge for fabricators measuring impedance on leading edge PCBs. The CITS880s answers that challenge with the introduction of Launch Point Extrapolation (LPE). LPE extrapolates the TDR response back to a point close to the start of the transmission line effectively allowing to users more accurately to measure the instantaneous or incident impedance of the line.
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7.5 GHz Low Capacitance ÷10/÷20 probe
PP066
The PP066 is a high-bandwidth passive probe designed for the use with the WaveMaster™ and other high-bandwidth oscilloscopes that have 50 Ω input termination. This very low capacitance probe provides an excellent solution for higher frequency applications, especially the probing of transmission lines with 20–100 Ω impedance.
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LXI 2.4GHz 50ohm 16x16 Matrix
60-770-003
The 60-770 is a family of integrated RF matrices suitable for use up to 2.4GHz in a 50 ohm transmission line system. The matrix design permits any single Y input to be connected to any single X input, permitting the concurrent connection of 16 RF paths. All signal paths are bi-directional permitting any connection to be used as an input or an output.
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CAN/FlexRay/Differential Bus PXI Fault Insertion Switch - 4 Channel
40-200-004
Each channel can support up to 0.3A and is rated to handle up to 100V between the wire pairs. The wire pairs have controlled transmission line impedance suited to most differential pair signaling systems, including fast CAN Bus interfaces and RS232. Each fault bus is capable of carrying 2A allowing multiple channels to be connected to the same fault condition. Additionally, each fault bus features a changeover relay to allow the user to connect alternative fault conditions to the fault buses.
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Impulse Semiconductor High Current Integrated
Transmission Line Pulse Test System
The Impulse Semiconductor High Current Transmission Line Pulse (TLP) test system is the tool of choice for extracting ESD parameters for transient protection devices in a package, or at wafer level. With accuracy better than 100 milliohms at 40 amps peak current, the Impulse high current TLP is specially tailored to the needs of today's ESD device designers who must accurately measure low values dynamic resistance irrespective of breakdown voltage.
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Cable Fault Locator
HT-TC / 400
Wuhan Huatian Electric Power Automation Co., Ltd.
Important test tools for wireline communication and power transmission line maintenance.
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Coaxial Components
Surge arrestors are designed to protect wireless base stations, switching centers and transmission lines fromthe damaging effects of extreme high voltage surges caused by lightning strikes. The RFS lightning protectiondevices are designed and tested to the most demanding specifications. They are rated to protect against bothdirect and indirect multiple strikes in the harshest environments imaginable. Their rugged construction utilizes solid metal housing, and superior plating, which results in outstanding system protection and operatingcontinuity.
