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Old 04-20-2011, 01:11 PM   #1
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Default $259 DMM + 'scope

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Old 04-20-2011, 04:31 PM   #2
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It's $90 off I think for today only.

I ordered one, it'll be a good companion to my full-size o'scope.
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Old 04-20-2011, 04:35 PM   #3
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I've seen a couple of rather interesting implementations on the iP(x)d-style devices recently. Most limit you to using the audio input, but a couple actually have a "real" interface on them. Sadly, I haven't found any that support two full-bandwidth analog channels, the best I have come across is one analog channel plus four logic-level inputs.


If somebody were to produce a reasonably-priced hardware+software combo to allow four analog channels with a reasonable bandwidth, that would probably be the killer app that convinced me to buy an iThing.
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Old 04-20-2011, 04:39 PM   #4
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Old 04-20-2011, 04:58 PM   #5
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I already have a two-channel USB scope. It's a cheaply-made Chinese device with poor documentation and a flimsy case, but it works fine for all of my low-to-moderate speed needs. And since I usually have my 12" laptop with me wherever I am, it's a workable solution.

To be honest, $800 is a bit much for the sort of work I use a portable scope for. Here in the lab, we've got several high-end Tek and Agilent scopes which are more than sufficient for high-speed work, I mostly just poke around under the hood of a car with my own personal unit.

Several years ago, some company (non US-based) was selling an adapter that allowed you to whichever Gameboy was new at the time as a scope. By the time I found them, they'd already folded... But that's what I'd really love to see- a cheap, compact, two-channel analog scope attachment for any of the current generation of smartphone devices.
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Old 04-20-2011, 05:15 PM   #6
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I use the scope above for all my work. Bench, car, shop. As much a I would like a 4-chan Tek, it is out of my budget for the time being.
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Old 04-20-2011, 10:33 PM   #7
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I've gotten to play with some of these at work. Idk what our customers use a 12GHz scope for, though.

http://www.tek.com/products/oscillos...0000_dsa70000/

Fluke makes some nifty little 60-100MHz handheld scopes, though I lost a little bit of faith in them when we sent one back for warranty repair (unit would not charge while in use) and we got it back really quick with a new calibration certificate. Funny thing is, it wouldn't even stay on long enough to complete a full calibration when I tried to afterwards.
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Old 04-20-2011, 10:47 PM   #8
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Quote:
Originally Posted by messiahx View Post
Idk what our customers use a 12GHz scope for, though.
They're handy for simultaneously looking at multiple points along the same path in a high-speed DSP circuit. Remember that with digital scopes, the "faceplate" bandwidth is typically shared across all active traces. 10 Ghz / 4 traces = 2.5 Ghz per trace.

When it comes down to the gates-and-traces level, "digital" circuits are analog. Even if the clock speed of a given circuit is only in the hundreds of Mhz, you need the extra bandwidth to be able to see things like rise/fall times, ringing, clock-to-data phase, etc. In our products, the highest bitrate anywhere in the system is only 155 megabits/sec, but we have two scopes with multi-Ghz bandwidth (and ultra-low capacitance differential probes that cost more than my car) in order to be able to see the little minutae in the signals.
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Old 04-21-2011, 01:45 PM   #9
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I scored a color LCD, 4-channel 2Ms-memory, 150 MHz, 2 GS/s Yokogawa scope for $1k over a year ago. Plenty of power even for my day job (switching power supply design)
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Old 04-25-2011, 03:25 PM   #10
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Coupon Code AFC909 drops it to $238, I think I'll pick one up.
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