* Not actually 4 channels. 2 O-scope channels, 2 digital inputs.<div>* Asylum has one, as well as a pile of the single-channel version.</div><div>* Distortion is terrible. 72 MS/s is an egregious enough exaggeration of something that is technically true that I would be tempted to punch their marketing guy in the snoot.<br>
<div>* Better than nothing. Marginally.</div><div><br clear="all"><span style="font-family:arial,sans-serif;font-size:13px"><b><b><div><span style="font-weight:normal"><b><b><span style="font-weight:normal"><span style="font-size:x-small">Drew Van Zandt</span></span></b></b></span></div>
<div><span style="font-weight:normal"><b><b><span style="font-weight:normal"><span style="font-size:x-small"><span style="font-family:arial">Artisan's Asylum Craft Lead, Electronics & Robotics</span><br>Cam # US2010035593 (</span></span></b></b><span style="font-weight:normal"><span style="font-size:x-small">M:</span></span><b><b><span style="font-weight:normal"><span style="font-size:x-small">Liam Hopkins </span></span></b></b><span style="font-weight:normal"><span style="font-size:x-small">R:</span></span><b><b><span style="font-weight:normal"><span style="font-size:x-small"> Bastian Rotgeld)<br>
</span></span></b></b></span><span style="font-family:arial,sans-serif;font-size:13px"><b><b><span style="font-weight:normal"><b><b><span style="font-weight:normal"><span style="font-size:x-small">Domain Coordinator, MA-003-D. Masquerade aVST </span></span></b></b></span></b></b></span><br>
</div></b></b></span><font size="1"><br></font><br>
<br><br><div class="gmail_quote">On Tue, May 1, 2012 at 3:10 PM, Tom Metro <span dir="ltr"><<a href="mailto:tmetro+hhacking@gmail.com" target="_blank">tmetro+hhacking@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Have you seen one of these?<br>
<br>
<a href="http://www.seeedstudio.com/depot/dso-quad-aluminium-alloy-black-p-1034.html?cPath=174" target="_blank">http://www.seeedstudio.com/depot/dso-quad-aluminium-alloy-black-p-1034.html?cPath=174</a><br>
<br>
DSO Quad is a pocket size 4 channel digital oscilloscope for common<br>
electronic engineering tasks. It's based on ARM cortex M3<br>
(STM32F103VCT6) 32 bits platform, providing 72MS/s sampling rate with<br>
integrated FPGA and high speed ADC. Internal 2MB USB disk could be<br>
used to store waveform, user application and upgrade firmware.<br>
<br>
<br>
Handheld DSOs have been around for a decade or more, but until fairly<br>
recently they've been over $1000 (see Fluke's Scopemeter family). In<br>
recent years there have been a few low-end scopes as kits or products in<br>
the sub-$300 range (Vellman (<a href="http://vellemanusa.com" target="_blank">vellemanusa.com</a>) makes a few), but the<br>
low-end specs make them useful for not much more than audio frequencies.<br>
<br>
There also have been computer add-on products for creating a DSO on the<br>
cheap. First peripherals for desktop computers, then laptops, and now<br>
iPhones. They all look pretty clunky to use.<br>
<br>
Now it appears the commodities spilling over from volume production of<br>
smartphones is making self-contained handheld scopes relatively cheap.<br>
The 2-channel (the 4-channel claim is misleading) 72MS/s DSO with a<br>
color LCD in a package about the size of a smartphone sells for about<br>
$200. These seems to be popular with hardware hackers.<br>
<br>
-Tom<br>
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</blockquote></div><br></div></div>