oscilloscope for audio repair

For this reason, the oscilloscope is a very important device in the maintenance and repair of electronic devices. But what is an oscilloscope? ** Why does this fool not reply to the points already made ? ** Same answer as before - CUNTHEAD !! When troubleshooting an amplifier, it is necessary to let it function as it would when used normally. But anyone familiar with the use of analogue scopes for audio test and. As a general rule, choose an oscilloscope with a bandwidth of at least five times higher than the maximum signal frequency to be measured. Keep in mind, however, that you dont have to buy two or more of these products to cover your bases, so to speak. Other features include 200/100/70MHz bandwidths, 1GSa/s Real Time sample rate, and up to 40K of record length. Just the audio processing sections (micamp -> compressor -> limiter -> modulator -> demodulator -> demphasis-> speaker amp) of two way radios. . >>repair work will find using a DSO to be mighty irritating and tedious - >>at>>best. They don't use any custom ICs,have simple >attenuators,have a decent size CRT graticule,and aren't too old. If you don't have a waveform generator, consider one of the following options: Leave it to you to have obsolete balls -- Lead free solder is Belgium's version of 'Hold my beer and watch this! The only problem is that I share itwith a friend and don't quite own it yet. I would be tempted to save some money and go with the Rigol DS1102E, (or even 1052E) but the DS2072 does have a bigger screen, faster update rate, and intensity graduated display. It can be quite time-staking to manually measure certain features of your audio waveform like the Period and amplitude. But from your post it appears that both channels are mis-behaving. This is a highly intuitive digital oscilloscope, too, thanks partly to the easy-to-learn layout and functionality of its buttons and functions. DC related phenomenon are a problem with a PC sound card based scope.There's no DC response, and the lower limit is about 20Hz. --Diverse Devices, Southampton, Englandelectronic hints and repair briefs , schematics/manuals list onhttp://diverse.4mg.com/index.htm. Oscilloscope Calibration Services. The oscilloscope displays the electrical signal according to its amplitude and frequency. >> Why?>>>>>Almost any ANALOGUE scope with bandwidth of 5 MHz or more is OK - DC>>>coupled or not.>>>>>>Digital scopes absolutely SUCK for audio work.>>>> Why duz it suck? The 64MB of memory is incredibly helpful with its ability to store around 2000 waveform results. There are some newer imports that MCM electronicscarrys. The reflection will showa smoking ruin for all the components, except the defective part,which will look perfect. By superimposing multiple stored traces on top ofeach other, ringing and oscillations are fairly obvious, even if theyexceed the frequency response and resolution accuracy of the A/Dconverter. There's aperforated grill and location for a fan on the lower back, but no fan.So, I added one on my working T922, which seems to be surviving sofar. If not I'll go for it.>> I'll investigate the digital option down the track.> Thanks for the other advicr given so far, I've noted it > all down.>>. !>>" There is no way to prove the point to fools like YOU by posting>messages on a newsgroup. The firmware update also makes it more practical to use. A sound card basedscope? Negatives are the plastic case that allows chassis flex,easy to break knobs that are no longer available. The YEAPOOK 5012H oscilloscope will make things a lot simpler for you with a weight of only 300g! A nice,simple,inexpensive used TEK scope would be the T922/T932/T935 or 442 scopes;15MHz or 35Mhz. LIUMY has integrated a chip into this oscilloscope solely designed to enhance its performance in producing flawless waveforms. Looks like I might be able to > pickup up> a tektronic 465 (100mhz) cheaply so does that sound ok or > was> there a newer 100mhz tektronic model more realible or > easier to> service? Very easy to carry as it weighs only 300g. You really should try it some time. Oscilloscopes for audio can also be used in different devices like electronic motor drives. This is a multi-purpose oscilloscope. The LM2020 is such a device, which can help you check your audio waveform and at the same time, make sure the voltage and current in your audio system are at proper levels. Next comes>>>a sig gen and then a scope (analogue not DSO and stand alone, not tied to a>>>pc). Set the oscilloscope to direct current (DC) coupling, and set other controls to zero. The sampling rate is how many frames the oscilloscope captures before producing the final output on the screen. Its relatively easy to connect audio to oscilloscope because of these integration and connection options. > Moral: Use your ears first, then use the scope. I am trying to repair a Hameg 412 Oscilloscope from 1976. Its sampling rate of 1 GS/s alone is a marvelous feature, meaning 1 Giga sample of the signal is created in 1 second, which helps to attain the most accurate waveform shape. The greater the number of channels, the more waveforms you can attain from various musical instruments and devices. For an oscilloscope, at least five samples may be required to make an accurate reconstruction of a waveform. That's your statement, and I'm asking for somesubstantiation. it turns the scopes nominal 1 Megohm input Z into a 10 Meg input.Less capacitive loading,too. Switch the oscilloscope to AC coupling to test the power supply. . It has advanced triggers besides beginner-friendly triggers that can isolate specific signals. This Siglent oscilloscope has an incredible bandwidth capability of 200 MHz! ** Even that is too technical for a RETARD like this cunt. The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes. I don't do much audio work. I replaced it with a new 100 MHz Hantek DSO5102P from eBay for about $250. Failed components appear as soldering iron burnt areasor are marked by red circles, which is what I sometimes do to mark theschematic after I finish the repair. If you're open to a PC-based tool, check out Digilent's Analog Discovery 2. The screen is large and bright with a high resolution so the waves are easy to observe and analyze. A benchtop model is fine.>> I want something specifically to cover tube/valve amps.> I need to be able to check the performance of amp and see if> my input signal is distorting, deteriorating, has interference> or other types of problems that plague audio.>> What the max MHZ range would I need to aim for?> What other features would it need or be handy?> Do you know a specific brand and model?> Do you think I need any other equipment?> Whats a good brand/model function generator?>> Lastly I have read suggestions that I should get an older analog> scope for this work. USB storage for saving purposes. There are two types of oscilloscopes: Analog and Digital. Whether you use an oscilloscope for sound design or amplitude testing, the number of channels can make your work more efficient. Set all controls on the oscilloscope to zero and set the oscilloscope to direct current coupling. Its price may be in the affordable spectrum but it has the feel and look of more expensive and sophisticated equipment. Required fields are marked *. The bandwidth of an oscilloscope is the range of frequencies it can display and work with. The video on my>>crystal ball is working just fine and is able to devine the future and>>troubleshoot problems with amazing accuracy. They don't use any custom ICs,have simple attenuators,have a decent size CRT graticule,and aren't too old. Your email address will not be published. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you. Start troubleshooting the amplifier by placing the oscilloscope probe to the part of the amplifier you want to test. Depends on what your doing You should also get a potential divider for when working on the o/p area asyou are bound to have the attenuator set on the wrong scale ,some time, andat least blow the first transistor.By the same reasoning an old 10 or 20 MHz scope with repair manual andusually no custom items in there, and make sure it easy to take apart forrepairing it, plus perhaps a dead one of same model for spares. A voltmeter, in contrast, may display a completely unexpected voltage whereas an oscilloscope will display an oscillating circuit. The96KHz 24bit sound cards are much better. Set the oscilloscope to direct current (DC) coupling, and set other controls to zero. Wouldnt it be awesome as well as cost-effective to have an oscilloscope that can carry out multiple functions for you? But the pictures are in the .bmp format, which can be a bit problematic for many users; perhaps the manufacturer can switch to a .png format. Detailed answers are fine. Its portability is boosted more by its rechargeable Li-ION battery, which has a rating of 3200mAh. >Next inexpensive TEK scope I'd recommend would be the 2213/2215/2235 >series (60 Mhz to 100 Mhz),but those do use a few TEK-made ICs that are out >of production.>But they have good reliability. This includes items that are defective in ways that render them difficult to use, items that require service or repair, or items missing essential components. He would just listen to whatever was coming> out of the speakers, scribble down what stage or device was blown, and> move on to the next machine. It would be best if you also had a sine wave generator connected to the amplifiers output, though this depends on the test. Oscilloscopes display a graph of an electrical signal in a circuit over time. The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user. Second, the special-purpose oscilloscopes are designed for specific purposes, such as for displaying waveform in an electrocardiogram or for analyzing the ignition system in automobiles. If possible, read the manual first since theres a slight learning curve in its use, which can be expected considering the number of features that come with it. High frequencies are more of a problem. Its an affordable oscilloscope with plenty of useful features including USB, Ethernet, triggers, and storage options, as well as a practical software and good bandwidth for a serious hobbyists needs. Start by removing the back and top panels of the amplifier. Its a great tool in assembly lines, electrical engineering classes, and product design offices, among other situations. The greater the sampling rate of the oscilloscope, the finer and clearer will be the features of the curve produced. Isubstituted "unusable" for "SUCK" because my proof reader doesn't likeprofanity. Whats a good brand/model function generator? That means you can use it for around 8 hours without a break and it will function just perfectly! 64MB memory stores 2000 waveform results, which can be edited and compared. Depending on your desired frequency for the waves, you can change the sweep speed whenever you like. Most modern oscilloscopes have two sampling modes or rates depending on the signal being measured repetitive sampling (i.e., more commonly known as equivalent time sampling) and real-time sampling. For time-based characteristics, these can measure frequency (i.e., the number of times per second a waveform is repeated); duty cycle (i.e., the percentage of a period when a wave is positive or negative); and rise and fall time. If youre an audio engineer, you already know how important oscilloscopes are for testing your audio voltage or observing changes on a beat due to various effects. Follow this by setting the input coupling to AC (Alternating Current). If a malfunction is detected in the signals, repair work begins. You can study the sound status from the amplifier by monitoring the wave on the oscilloscopes screen. You can point out minute errors more easily and use it as a multimeter too. Automatically showcases 30 different measurements with one click. Since the current from the amplifier has to go somewhere, the best practice is to connect only the red cable of an electronic load to the amplifier. Related Article: Best Electronics Multimeter reviews. It is worth noting that the purpose of connecting the ground cable to the chassis ground is to prevent electrocution during the procedure. I have a 2213. Get a quick quote! But if youre familiar with the analog layout and its something youre comfortable using, then go for it. I need to have flexibility so I wont> have to buy another for a while. ** DO NOT BUY A DIGITAL SCOPE !!!!!!!!!!!!! Thus you can troubleshoot each wave if the disturbance is not readily visible. Minimum 20/30MHZ bandwidth. Many agree that its a dream oscilloscope because it combines the benefits of a wide range of professional features and a hobbyists budget. Crossover distortion looks like crossover distortion. 6.3 Locating Hum. You can find these scope for well. With this, the electronic load absorbs the attenuated power while the amplifier functions normally. The former is more popular, nonetheless, because the latter has few, if any, features that cant be topped by their digital counterparts. You can't explain why a digital scope is not usable foranalog work. Users can also use free computer software for its improved performance. >Almost any ANALOGUE scope with bandwidth of 5 MHz or more is OK - DC >coupled or not.>>Digital scopes absolutely SUCK for audio work. However, I can do somethinglike that with 2way radios. This is a product of the collaboration between Analog Devices and Digilent as well as supported by the Xilinx University Program, thus, its suitability for academic use even for high school students. ', There must be a ball shortage in Australia:, You do not have permission to delete messages in this group, Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message, Hi can someone please help me with what scope I should get for, >You should also get a potential divider for when working on the o/p area as, Distortion has to be pretty awful to see it on a scope and if you see, On Sun, 4 Apr 2010 01:55:47 +1100, "Phil Allison" <, On Sun, 4 Apr 2010 12:03:59 +1000, "Phil Allison" <, On Sat, 03 Apr 2010 10:52:49 -0500, Jim Yanik <, On Sun, 4 Apr 2010 14:08:00 +1000, "Phil Allison" <, On Sun, 4 Apr 2010 15:22:07 +1000, "Phil Allison" <, On Sun, 4 Apr 2010 09:00:56 +0100, "N_Cook" <. But dont stop with choosing the best either! This device makes your work simpler and quicker. I was genuinelyinterested in WHY you thought digital scopes were unsuitable for audiotesting and troubleshooting. Some people also go for old ones as theyre relatively cheaper and a working oscilloscope will still give accurate results even if its old. > and FFT which is spectrum analysis. How to Connect an Oscilloscope to an Amplifier. Choose one that best fits your needs, whether youre a hobbyist or a professional repairman, or an educator, and make the best use from it. Youre easily getting your required values along with extra specifications. A high sampling rate combined with a small memory means the unit can only utilize its full sampling rate on only a few time bases. Furthermore, this device makes almost negligible noise while working. >> for audio work?>>** Same answer as before - CUNTHEAD ! Remember, most music players have only one headphone jack. Conclude the setting by adjusting the vertical input control to one volt per division and the horizontal sweep speed to one millisecond per division. Ive been trying to fix my Hung Chang brand, (Protek 6502 model) scope that I bought second hand (in good working condition)? Protects by shutting off automatically in risky situations. The device comes with three trigger modes, more than the usual two in normal oscilloscopes. After it was delivered in the post I noticed that it couldn't get a .5v square wave when the probe was connected to the .5v calibration pin? The bottom line: Between an analog and a digital oscilloscope, the latter is the better choice in terms of economy, features, and applications. >>>** DO NOT BUY A DIGITAL SCOPE !!!!!!!!!!!! With that being said, there are several features that must be considered when choosing an oscilloscope for audio testing purposes. An oscilloscope is an electrical instrument used in different fields for displaying an electrical signal. Its also easy to install and use, as well as troubleshoot since it comes with its own feature-packed software and USB and LAN interfaces. Oscilloscope Repair. Did I miss anything on why an analog scope is superior to digital? While this might mean connecting a speaker for the output sound, it is a bad practice to shun. > I use a digital oscilloscope for audio all of the time. ($50 to $200 dollars) I like Tektronix, but a older BK, Hitachi, Kikutsior such would be fine. The monitor is relatively small at just 7 inches but it has high resolution so the images can easily be read. On-Site Repair Advantage . The technical storage or access that is used exclusively for anonymous statistical purposes. In this video Filip troubleshoots Tektronix 2201 Analogue and Digital Storage Oscilloscope without a service manual.Part 2 - Repair: http://youtu.be/Y-w08JOE. Music is an example of sound, meaning it can be measured with an oscilloscope. It is easy to observe audio with an oscilloscope if you are already familiar with oscilloscope operation. In other words, I ignore the low freq sag. Tektronix 2465A SRAM Chip Replacement By Ferro Magnetic Ram A Great Success. We chose five of the best oscilloscopes for hobbyist based on personal testing and consumer reviews. Most oscilloscopes feature one or two channels but using four channels, you can attain four different graphs from various instruments, compare and monitor them according to your needs, and combine them for the best music! After a DVM the next most useful piece of test equipment is a crystalearpiece with a high voltage cap in tow, for audio repair work . For example, a 1K buffer memory can limit the units sampling rate to just 5MS even when its able to sample at 100 MS/s. ( septic = septic tank = Aussie slang for Yank ). See below. They can be had for very little money these days. To trace instabilities and oscillations a scope is absolutely mandatory. Check Out: best hobbyist benchtop power supply reviews and buying guide. This is what I use formost of my tinkering and light weight waveform sniffing. The problem seems to be that the scope does nothave a fan and the flyback was probably overheating. The Siglent SDS1102CML oscilloscope is a great scope for the money, too. If for instance you want to look at cross over distortion in any kind of detail while adjusting amplifier balance, then a CRO is superior. A non-ripple-like waveform when you press the oscilloscopes probe to the output transformer might mean an issue with a primary winding. You can do that by using a microphone, or tape recorder, or any software from your PC, and a waveform will be produced on the oscilloscope screen. Look that up if you have no idea what it is. I checked the service manual, but the schematics show . More often than not, it will not work as expected because of poor voltage levels, design errors, and electrical noise, among other reasons. Put your headphones on to listen to the music. window.addEventListener("wpsolr", function(){wpsolr(10, "inline", null)}); ReviewerTouch.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to amazon(.com, .co.uk, .ca etc) and any other website that may be affiliated with Amazon Service LLC Associates Program. Oscilloscopes are amazing devices that you can have to experiment with lots of different experiments and ideas. Not audiophile, but production line warranty repair forvarious manufacturers of various audio related equipment. But their most common uses are for troubleshooting malfunctioning radios, audio amplifiers, and television receivers. Emphasis must be made that most oscilloscopes in the market today are digital storage oscilloscopes (DSOs) but many electronics engineers still use analog oscilloscopes. ** So do all analogue scopes too - you bloody fool. 6.4 Distortion Measurements with Sine Waves. Posted June 11, 2021; 21; Important Maintenance on a Kenwood CS-5130 40MHzOscilloscope with Read-out. Although the view of the waveform may be different that an analog scope, there can be overriding benefits. He didn't know how. There's not much air circulation in the upper section (where theflyback lives) so I added some holes in the top cover (under thehandle) to improve circulation. Accidents like sudden voltage spark when using the electric guitar or some malfunction in your home audio system can damage your oscilloscope. These also have the highest bandwidths and single shot ability, as well as provide precise on-screen measurements than their analog counterparts. I partly compensate with the scope probe compensation, and just remember what the "sag" looks like when the scope is directly connected to the square wave generator. Typically, the smoother the wave, the better the sound. CRO's aren't always as bulky and heavy as most people think. Set the horizontal sweep speed to . a calibrated used Hameg 1005 actually at 200. MyPC based scope has numerous macros for specific 2way radio tests andmeasurements that I do constantly. I place theschematic behind the crystal ball, and look at the highly distortedfuture image. Step 3: Connect to Oscillating Signal. As an Amazon Associate, we earn from qualifying purchases. Plus, this oscilloscope can be connected to your personal computer through its USB 2.0 port on its rear panel. My reading glasses have morphed into surgeons glasses. How Do I Connect An Oscilloscope To Audio? What would be best for audio and offer the most flexibility?Or has there been a scope that covers both digital and analog well? Itll be easier for you to adjust the waveforms by comparing them to each other, monitoring the changes at an exact instant, and ensure all the sound features are at the perfect level. Audio signals can be studied best at around 20mV divisions. > Most digital scopes have measurement functions such as frequency and > amplitude. Connecting a speaker will get it damaged and can even damage your hearing. These can also measure both voltage-based and time-based characteristics. ** There is no way to prove the point to fools like YOU by posting messages on a newsgroup. In this blog post, we will discuss how to use an oscilloscope for audio. Slew rate testing is difficult with a digital scope, unless the scopesusable bandwidth is more than 5 times the highest frequency ofinterest. The triggers work well for such an affordable scope although these can be a bit finicky occasionally. With this, your oscilloscope is an excellent troubleshooting instrument for your amplifier, should you have a poor output sound. Instead, all you could do is spewprofanity and insults. I'll investigate the digital option down the track.Thanks for the other advicr given so far, I've noted it all down. The instrument converts electrical signals into waves and displays them through its graph-like screen, which contains the X-axis and Y-axis. It has an excellent display, too, and its easy to download an image of the waveforms shown on the monitor. Cos he is an autistic fuckwit - of course. DSOs are portable, as well as offer users a wide range of features including intuitive user interfaces, storage and printing options, and high-resolution color displays. >** DO NOT BUY A DIGITAL SCOPE !!!!!!!!!!!!! The sampling rate is responsible for producing detailed and precise waveforms, which affect your measurements. One common function of an oscilloscope is to troubleshoot an amplifier. You can also constrict the time scale to milliseconds, enabling you to find unnecessary peaks and troughs and adjust any imbalance in your audio. in the horizontal part of the waveform even with a DC coupled audio amplifier. One works, but the othertwo have blown flyback xformers. And then read the digital ones "can" do the job.It is a bit of conflicting information what do you think? Lastly I have read suggestions that I should get an older analogscope for this work. I'm not>>sure the other accessories will be very useful. You are making a relatively substantial investment in precision equipment for your laboratory, workshop, or classroom so you may as well get your moneys worth. There are probably other areas where an analog scope is better thandigital. If you have a waveform generator you can use that, set it to a pulse or aquare wave with 2.5V amplitude at 500Hz. While this device supports a bandwidth of up to 110 MHz, it comes with a unique FFT function that converts your time-domain graph to a frequency-domain one. Look out for faulty parts of the amplifier by observing parts with uneven waveforms with inconsistent peaks on the oscilloscope screen. Each has their place. DOS1102 comes with an automatic option that showcases 30 different measurements of the waveform! The sound signal should be converted to an electrical signal first. Unscrew the screws with a screwdriver to reveal the circuit board and chassis ground needed for troubleshooting. Myears are fine, but haven't been the same since I bought an iPod Touch.I do have a magnifying glass, but find a microscope more useful forPCB work. Saves waveforms in 80000 different accessible segments. For many hobbyists, beginners and even engineers, choosing the best oscilloscope can be overwhelming, if not daunting, because of the sheer number of choices available. When testing for best forward swing, one would need to use an accurate wattmeter, a decent quality dummy load, and RF pickup box to distribute signals for test gear, a 1000hz audio feed to the mic, and a scope to be sure that the waveform shows no negative or positive peak distortion - which can only be seen on a scope . So, instead of arguing infavor of digital (which is my preferred position), I supplied severalreasons why an analog scope is superior to digital for audio testing,thus providing you with at least a foundation to build upon. Shop By Phone . So there you have it how to use an oscilloscope for audio. The information includes step-by-step instructions for its use, background theory, and tips for efficient work documentation. At least 10 or 20M b/w usually means not a load of difficult to remove can screeninginvolved. This will allow you to follow the signals on the scope you are fixing. They can be a standalone unit, inside a scan . Rechargeable Li-ION battery works for 8 hours straight. A good oscilloscope depends on the purpose of the hobbyist. You should ask yourself these questions and then some so that you can narrow down your choices: When you have answered these two all-important questions, you can make the first decision in choosing the right audio oscilloscope analog or digital.

Apache Vs Nginx Market Share, Duke Ellington School Of The Arts Chappelle, 3 Principles Of Rule Of Law Dicey, How Is Dave Grohl Doing After Taylor Hawkins' Death, Simple Sentence Unscramble, Ernesto's Restaurant Menu, Functionary Crossword Clue 7 Letters, Density Powerpoint 5th Grade,