What eBay item for $70? A signal generator? On Aug 1, 2014 2:43 PM, "Sova" <[email protected]> wrote:
> I sort of came to the same conclusion that having two separate tools would > probably be more convenient than one box. Like you said, if it were $100 > then that would make sense but there is other options for $250-$350 range. > That cheap $70 unit on EBay is interesting. I don’t know I need a > generator at this moment but that seems like it might be worth > considering. The frequency counter might be nice but I have one in my DMM > right now. If there was interest we might be able to do a group buy of > them direct from China and get the price down to $50 a piece even. > > > > Sova > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Paul Stoffregen > *Sent:* Friday, August 1, 2014 5:25 AM > *To:* [email protected] > *Subject:* Re: [dorkbotpdx-blabber] Looking for input on oscilloscope > > > > > > Also I noticed that the Rigol model he mentioned comes with an optional > function generator for $250 more [Model DS1074Z-S] which might save money > over buying one separately. > > > Something to consider with built-in extras is the shared user interface. > On a scope, you'll access this stuff using the menus, which are already > packed with tons of scope features. Budget scopes have lots of crafty ways > to share knobs, like only 1 set of vertical controls among all channels & > math. It usually works pretty well, with only minor inconvenience for > saving a lot of $$$, but those menus do tend to get pretty crowded. > > With a dedicated function gen, you get a big knob to vary the amplitude > and/or frequency, buttons to change waveform and settings, and usually a > display that shows what it's doing. The controls are optimized for the > function generator features, which makes using it quite a bit easier and > more natural than a function generator shoehorned into the scope's menu > system. > > If it were under $100, of course the decision would be easy. There are > many dedicated DDS function generators in the $250 to $350 range, and a lot > of used gear well under $250. If you only need basic signals at modest > frequency and you don't need the frequency stability of DDS, there are a > lot of old/used but good quality analog function generators under $70. > > There's also some really cheap DDS stuff out there now, which might > actually work? If anyone actually takes a chance buying these, or already > has one, I'd be really curious to play with it sometime at a Monday meetup. > > > http://www.ebay.com/itm/10MHz-DDS-Function-Signal-Generator-Carrier-Debugging-Source-Frequency-Counter-/281310662043?pt=LH_DefaultDomain_0&hash=item417f6c0d9b > > > http://www.ebay.com/itm/2MHz-Dual-Channel-DDS-Function-Signal-Generator-Sine-Square-Wave-Sweep-Counter-/111407197529?pt=LH_DefaultDomain_0&hash=item19f062ed59 > > > http://www.ebay.com/itm/2MHz-DDS-Function-Signal-Generator-Frequency-Counter-Square-Wave-Sweep-BNC-TTL-/281295638078?pt=LH_DefaultDomain_0&hash=item417e86ce3e# > <http://www.ebay.com/itm/2MHz-DDS-Function-Signal-Generator-Frequency-Counter-Square-Wave-Sweep-BNC-TTL-/281295638078?pt=LH_DefaultDomain_0&hash=item417e86ce3e> > > _______________________________________________ > dorkbotpdx-blabber mailing list > [email protected] > http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber >
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