1502 Tdr Cable Tester Manual

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1502 Tdr Cable Tester Manual

The CT100B's high resolution shows connector details that lesser devices completely miss. For eligible purchasers, the CT100 is NSN listed: (7Z) 6625-01-579-6793. Something went wrong. View cart for details. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. The TDR transmits a step pulse in the cable and listens for a reflection. If the cable is properly terminated then the pulse will be fully absorbed by the termination and there will be no reflection. Any discontinuity will cause a reflection which is added or subtracted distorting the step pulse. The round trip time can then be measured and using the speed of signal propagation in the cable the discontinuity can be pinpointed with extreme accuracy. One specific instance of the value of a TDR was one of the museum volunteers helping an friend find a short in a water well power line which ran out 2000 feet from the house. They disconnected the power from the breaker panel and connected it to the TDR. They had to guess at the propagation velocity and dialed out 380 feet to the short as indicated on the TDR. They went and paced off 380 feet and about 6 feet away was a post the owner had put in the ground a couple of years ago. That post cleaned some isolation off of that cable and caused the eventual failure. The TDR found the issue in nothing flat! Click on the image to view the PDF. In the 1502 on display at the museum in this photo the cable is unterminated and the reflection is adding to the step pulse. The cable dielectric buttons select the type of cable (which sets the appropriate velocity factor) and the zero reference is adjusted to align the leading edge of the step pulse to the left side of the screen. You can also see another smaller discontinuity in the trace as the signal is again reflected. If you would like to donate to vintageTEK, check with your employer to see if they have such a program.

Please upgrade your IE6 browser, or view in Mozilla Firefox or Safari.This 1502 is appropriate for testing coax and other cables in ships, radar sites etc. This unit uses a step-pulse and provides fault resolution to 0.6 inch on short cables and performs to a maximum of 2000 feet. Housing has scratches and sticker residue.Use single quotes (') for phrases. Mike or Wendy. Phone: 905.887.0007 Toll Free: 877.974.0007 Fax: 905.887.0006. View Discounted Products Some of the CT100 Series’ innovative features are described below. Also, please read CT100 Series Features for more information. Represents a balance of performance and electrical overstress protection for field applications where SMA test port is desired. Comes in a rugged plastic case. Ideal for use with the CT100. Comes in a rugged plastic case. Ideal for use with the CT100HF. Rugged clamshell construction securely fastens to the top of the instrument. ACA TMetrix Inc. is a leading supplier of test instruments and design tools in Canada. For over 50 years we have provided services and support for products that are manufactured by the world's leading instrument suppliers. Allan Crawford Associates (ACA), is one of Canada's largest distributors of electronic components, test equipment, and scientific solutions. Website developed by MoreSALES.ca. The 1502C can measure up to 2,000 feet (625 meters). Using a process similar to radar, the 1500C Series transmits electrical pulses down the cable under test. Impedance changes in the cable reflect some of the pulse energy back to the MTDR. The reflections are displayed on a backlit, HyperTwist, high-contrast nematic LCD display. The characteristics of the displayed trace allow the user to determine the nature of the cable fault. When testing 50 O cable with a Vp of 0.66, the 1502C allows the determination of 0.5 O cable faults. Multiple faults can be measured as close as 0.8 inch. The 1502C measures 50 O impedance.

Tektronix 1502C Metallic TDR Cable Tester Manuals, Datasheets, Drivers, Links Tektronix 1500C Series Datasheet (pdf) Tektronix 1500C Series Manual (pdf) View all Tektronix products Tektronix 1502C Metallic TDR Cable Tester Specs General Manufacturers Tektronix Model 1502C Condition Used and in Excellent Condition Product Family 1500C, 1500 C, 1500-C, 1502C, 1502 C, 1502-C, 1503C, 1503 C, 1503-C View It Live Request Buying used equipment doesn't always have to be a shot in the dark. We know there are plenty of differences when it comes to used equipment and quite often, choosing between different pieces is difficult, especially when the equipment is not sitting right in front of you. Well, what if you were able to see a piece of equipment before you purchased it. Not just a picture from the manufacturer's website, but the actual piece of equipment you would receive. You can zoom in close to see the labels with the serial number or zoom out to see the overall condition of the equipment. It's like having the store come to you. InstraView Request Form To get started. 1. Fill in the request form below 2. We'll send you an email letting you know exactly when your piece of equipment will be available for viewing Item to Inspect: 73484-3 - Tektronix 1502C Metallic TDR Cable Tester Error Please contact us to complete your request. Thank You! We will be contacting you shortly. Warranty: If there's a problem, we'll make it right. Your satisfaction is how we measure success. Returns: No hassle return policy. Repair: Our team of engineers are creative problem solvers who understand your challenges. Payment: Custom Calibration: You give us the specs and we do the rest. Share this page: I got answer to all of my questions and everything was flawless. Thank you once again. Tia W. Quick process from getting a quote to getting the items we ordered. Mike A. I got the package. SBC worked out great. We are back in business. Much appreciated! Artisan has saved the day again.

With over 20 years of We work quickly. It can also be used to locate discontinuities in a connector, printed circuit board, or any other electrical path. In order to measure those reflections, the TDR will transmit an incident signal onto the conductor and listen for its reflections. If the conductor is of a uniform impedance and is properly terminated, then there will be no reflections and the remaining incident signal will be absorbed at the far-end by the termination. Instead, if there are impedance variations, then some of the incident signal will be reflected back to the source. A TDR is similar in principle to radar.The distance to the reflecting impedance can also be determined from the time that a pulse takes to return. The limitation of this method is the minimum system rise time. The total rise time consists of the combined rise time of the driving pulse and that of the oscilloscope or sampler that monitors the reflections.By analyzing the magnitude, duration and shape of the reflected waveform, the nature of the impedance variation in the transmission system can be determined.The magnitude of the step produced by the resistive load may be expressed as a fraction of the input signal as given by:If there is a step increase in the impedance, then the reflection will have the same sign as the incident signal; if there is a step decrease in impedance, the reflection will have the opposite sign. The magnitude of the reflection depends not only on the amount of the impedance change, but also upon the loss in the conductor. Alternatively, the display can be read as a function of cable length because the speed of signal propagation is almost constant for a given transmission medium.Some TDRs transmit a pulse along the conductor; the resolution of such instruments is often the width of the pulse. Narrow pulses can offer good resolution, but they have high frequency signal components that are attenuated in long cables.See spread-spectrum time-domain reflectometry.

Together, they provide a powerful means of analysing electrical or optical transmission media such as coaxial cable and optical fiber. The blue trace is the pulse as seen at the far end. It is offset so that the baseline of each channel is visibleThe blue trace is the signal as seen at the far end.Instead, an inverted pulse reflects back from the short towards the launching end. It is only when this reflection finally reaches the launch point that the voltage at this point abruptly drops back to zero, signaling the presence of a short at the end of the cable. That is, the TDR has no indication that there is a short at the end of the cable until its emitted pulse can travel in the cable and the echo can return. It is only after this round-trip delay that the short can be detected by the TDR. With knowledge of the signal propagation speed in the particular cable-under-test, the distance to the short can be measured.In this case, though, the reflection from the far end is polarized identically with the original pulse and adds to it rather than cancelling it out. So after a round-trip delay, the voltage at the TDR abruptly jumps to twice the originally-applied voltage.The value of zero means that there is no reflection. The reflection coefficient is calculated as follows:This includes abrupt changes in the characteristic impedance. As an example, a trace width on a printed circuit board doubled at its midsection would constitute a discontinuity. Some of the energy will be reflected back to the driving source; the remaining energy will be transmitted. This is also known as a scattering junction.They are indispensable for preventive maintenance of telecommunication lines, as TDRs can detect resistance on joints and connectors as they corrode, and increasing insulation leakage as it degrades and absorbs moisture, long before either leads to catastrophic failures. Using a TDR, it is possible to pinpoint a fault to within centimetres.

The slight change in line impedance caused by the introduction of a tap or splice will show up on the screen of a TDR when connected to a phone line.By observing reflections, any unsoldered pins of a ball grid array device can be detected. Short circuited pins can also be detected in a similar fashion.In the former, the time domain reflectometer is used to isolate failing sites in the same. The latter is primarily limited to the process industry.The device determines the fluid level by measuring the time difference between when the impulse was sent and when the reflection returned. The sensors can output the analyzed level as a continuous analog signal or switch output signals. In TDR technology, the impulse velocity is primarily affected by the permittivity of the medium through which the pulse propagates, which can vary greatly by the moisture content and temperature of the medium. In many cases, this effect can be corrected without undue difficulty.Over the last two decades, substantial advances have been made measuring moisture in soil, grain, food stuff, and sediment. The probes are typically between 10 and 30 cm long and connected to the TDR via coaxial cable.The electrical impedance at any point along a coaxial cable changes with deformation of the insulator between the conductors. A brittle grout surrounds the cable to translate earth movement into an abrupt cable deformation that shows up as a detectable peak in the reflectance trace. Until recently, the technique was relatively insensitive to small slope movements and could not be automated because it relied on human detection of changes in the reflectance trace over time. Farrington and Sargand (2004) developed a simple signal processing technique using numerical derivatives to extract reliable indications of slope movement from the TDR data much earlier than by conventional interpretation.

This can be done by placing the TDRs in different soil layers and measurement of the time of start of precipitation and the time that TDR indicate an increase in the soil moisture content. The depth of the TDR (d) is a known factor and the other is the time it takes the drop of water to reach that depth (t); therefore the speed of water infiltration (v) can be determined. This is a good method to assess the effectiveness of Best Management Practices (BMPs) in reducing stormwater surface runoff.The TDR provides an electrical signature of individual conductive traces in the device package, and is useful for determining the location of opens and shorts.Based on the injection of a multicarrier signal (respecting EMC and harmless for the wires), this smart technology provides information for the detection, localization and characterization of electrical defects (or mechanical defects having electrical consequences) in the wiring systems. Utah State University. Structural Materials Technology NDT Conference 2000. Microelectronics Failure Analysis.By using this site, you agree to the Terms of Use and Privacy Policy. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you! Please wait. Shorted cables near the antenna may pass RF at a reduced level with a DC short indication. Shorted cables near the antenna end may show higher than normal SWR at VHF and UHF frequencies.To use this website, you must agree to our Privacy Policy, including cookie policy. Yes, if it is like the 1503. It was cut a bit smaller than the battery cavity. The bananna plugs mount through it. The whole assembly slides into the place where the battery goes. A 12 volt DC power supply plugs into a jack on the aluminum plate. You need a supply capable of about 500 ma. Wires connect from the jack to the bananna plugs. All that was done so that I did not need to modify the TDR. To determine polarity: remove the TDR case.

Connect a meter to the bananna jacks where the battery plugs in. Attempt to power the thing on from AC power - NOT from your power supply, which is NOT connected at this point. A pulse will appear across the bananna jacks - note the polarity. Repeat numerous times until you are sure of the polarity. For my power supply, I used a 12 volt DC wall wart. I installed a diode and a 4700 uf 35 v electrolytic in the space between the plates in the adapter. All the above applies to the 1503. Turns out nothing was wrong - the thing requires a 12 volt battery, even though it has a line cord.If you want, e-mail me and I'll send you pictures of the adapter I made. Ed The sampling systems are totally different. The owners tended to keep the TDRs plugged in all the time and then expected them to work just fine on battery in the field. I specialized in those instruments in the OKC service center and had only one customer (Southwestern Bell in Edmond, OK) who did it right and figured it out on his own. Then he gave it an overnight charge and didn't recharge until the meter indicated a low battery. The two biggest killers of the 1502: (1) connecting the BNC to a live circuit and (2) not discharging long coax cables before connecting to the BNC. Seemed expensive then, but don't you wish for those prices now! Dean Dean The Group moderators are responsible for maintaining their community and can address these issues. This includes: harm to minors, violence or threats, harassment or privacy invasion, impersonation or misrepresentation, fraud or phishing. Subject of the new topic. The answer is “more than you might expect”: But eventually I managed to get both working: I recapped the PSUs, rewelded the case with methylene chloride, used my “new” 12kV scope probe and 40kV meter to repair the HV PSU, created a “NiCd emulator”, and the CRT wasn’t damaged after all.

As usual, the scope trace shows a graph of voltage versus time, but in a TDR: The 1502 provides three different scale factors for different dielectric constants. Since there is no processor in the TDR, Tektronix provides nomograms and tables for the operator to convert between reflection coefficient and impedance. While it is reasonable to define that the operator must not connect the TDR to a “live” UUT, it isn’t reasonable to presume there’s no static electric charge in the UUT out in the field. To discharge any such voltage, Tektronix have a very unusual BNC connector containing a shorting bar. As the cable is being attached the bar shorts the static to the shield, and when the cable is fully inserted the shorting bar is disconnected. It is thus a pulse where the duration corresponds to the distance between the sampling diodes and the BNC connector: The damage was very visible when the faulty cable was touched or moved, since the trace moved up and down. Bookmark the permalink. Both protectors are fast acting. Alternatively it ought to be possible to use 3000mAh tagged sub-C NiMH cells. With this solution it is again possible to use the 1502 away from a mains power supply. However even when turned off, an unmodified 1502 draws 2mA from the battery; over several weeks the cells will be discharged, and then some will start to be reverse charged. I do not know the effect of that on NiCd nor NiMH cells. The solution to that is twofold. In parallel with the resistor, I raided my junkbox to use somewhat dubious capacitors (nominally 8800uF) that were conveniently cell-sized. That was almost sufficient, but sometimes the undervoltage protector still tripped. If you have a 1502, I can dig out the details of the resistors and capacitor. I may compromise by selling the emulator and giving advice on replacement cells. Notify me of new posts via email. To find out more, including how to control cookies, see here.

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