How to use an oscilloscope / What is an oscilloscope / Oscilloscope tutorial - Duration: 32:01. Mjlorton 734.

Click to expand.That's about what I did. Works just fine. If I run across a Techtronix cheap in a surplus store, I' at least think real hard about it. But what I've got works just fine.

If I happen to give it a jolt of too much voltage (I got higher rated probes than stock, though) or something, I don't have to cry all the way to the bank. Restaurant Accounting Software. Edit add: Not impressed with digital for working on amps, good old analog is just fine. Rapidsketch 2 5 Keygenguru. Not interested in handheld, it's gonna sit on a bench so I can use all my paws at once. I do like a larger screen.another point for a bench scope. The larger the screen, the easier it is to see small anomalies that give you important clues.

Click to expand.I've used handheld scopes in the past, and the only good thing I can say about them is they're better than nothing. Certainly not the sort of thing you'd want to do any serious work with, or for any length of time, or very often.

Portable is ok, though. I've used lotsa those. You might want to check out ebay.

Since microprocessors have become ubiquitous in nearly all things electronic, the market has been flooded with some very fine 'scopes up to 100Mhz for very little money, because they're just not fast enough for even rudimentary troubleshooting. You'll regularly see $3,000 to $5,000 units going for $50 to $100. These are great for audio work, where signal frequencies are glacially slow relative to what you'll see in micro-based widgetry. The other nice thing is good 'scopes aren't usually entrusted to dingbats, so they're generally in very good condition. A 10-20 year old unit will often look and perform like new. My only caveat with used 'scopes is to stay away from the 'storage' models. The CRTs in those things have surprisingly short lifespans, and are very expensive to replace.

Fortunately, you rarely need that feature in audio work anyway, so it's easy to live without. Also, watch out for probes. You want at least one 10x probe, preferably two. If the 'scope doesn't come with them, they're surprisingly expensive.

I paid nearly as much for the probe I had to buy as I did for the 'scope after the 'scope I bought didn't come with any. Click to expand.I run an A2LA accredited calibration lab called Tangent Labs and can test calibrate/verify any electrical equipment you have. So if you get a suspect piece of equipment, I can tell you if it's in spec or out of spec, and whether or not you can repair it.

I've checked unrepairable scopes and DMM's people have bought off of EBAY and Craig's List, and people have sent them back and got their money back from the seller. I know that's not always going to be the case, but a lot of people are selling bad electrical equipment that has been red-tagged, and there's really no one that can regulate it. I run an A2LA accredited calibration lab called Tangent Labs and can test calibrate/verify any electrical equipment you have. So if you get a suspect piece of equipment, I can tell you if it's in spec or out of spec, and whether or not you can repair it. I've checked unrepairable scopes and DMM's people have bought off of EBAY and Craig's List, and people have sent them back and got their money back from the seller. I know that's not always going to be the case, but a lot of people are selling bad electrical equipment that has been red-tagged, and there's really no one that can regulate it.

Data Sheet Technical data subject to change © B&K Precision Corp. 2012 v013012 www.bkprecision.com Tel.: 714.921.9095 B&K Precision's model 2120B is a dual trace oscilloscope that offers high performance at a low price. Most competi- tor's entry level oscilloscopes have a 20 MHz bandwidth, while B&K Precision's models 2120B has a bandwidth of 30 MHz. This oscilloscope is built by and backed by B&K Precision, a company that has been selling reliable, durable, value priced test instruments for over 50 years.

■ Dual or single trace operation ■ 5 mV/div sensitivity ■ AUTO/NORM triggered sweep operation with AC, TVH, TVV and line coupling ■ Compact low profile design ■ cUL certified Speci ficat ions 21 20 B VERTICAL AMPLIFIERS (CH 1 and CH 2) Sensitivity 5 mV/div to 5 V/div, 1 mV/div to 1 V/div at X5 Attenuator 10 steps in 1-2-5 sequence. Vernier control provides full adjustment between steps Accuracy ±3%, ±5% at X5 Input Resistance 1 MΩ ±2% Input Capacitance 25 pF ±10pF Frequency Response 5 mV to 5 V/div: DC to 30 MHz (-3dB). X5: DC to 10 MHz (-3dB) Rise Time 12 ns (Overshoot ≤5%) Operating Modes CH 1: CH 1, single trace CH 2 CH 2, single trace ALT dual trace, alternating CHOP dual trace, chopped ADD agebraic sum of CH 1 + CH 2 Polarity Reversal CH 2 only Maximum Input Voltage 400 V (DC + AC peak) SWEEP SYSTEM Sweep Speed 0.1 µs/div to 2 s/div in 1-2-5 sequence, 23 steps, Vernier control provides fully adjustable sweep time between steps.