Function generators (again)

Ouch, that is expensive. That is 1970's technology.

I think it's always best to show them the real McCoy, how it's really done in the industry. After all, schools and universities are supposed to prepare them to weather it in that world for four decades or more.

Forget it Jake, it's China.

"Forget it Jake, it's China(town)" >:-} ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

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Grin, this is just 'basic' physics. So I'm not sure there is any industry to compare it with. But seeing the same thing from two sides (so to speak) can be very useful. And sometimes the equations are easier one way rather than the other.

OK this will most likely be boring, but a colleague and student did the frequency sweep and were able to extract the hyper-fine splittings from the data.

George H.

Nice write-up, George. And I found you on the Teachspin home page.

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~10$ fpga, ~2$ video DAC, ~2$ MCU, $2 display, and some code

and that is in ones from digi, is that price so crazy?

some of the cortex ARMs have 1Msample DACs so if you don't need the speed you are down to an mcu and a display

-Lasse

Not to nitpick, but they really should update the copyright notices on their website.

Hi Michael, Ahh can you tell me a bit more what you mean by the above? (I guess I don't even know what copyright notices on web sites are, where to find them, how to update... and why I would care....)

Thanks, George H.

I have a Siglent SDG 1020 for a year now and am happy. My only gripe is the software to create arbitrary waveforms. I paid ~270US$ OTC in Shenzhen.

Werner Dahn

You pages show copyright dates. They are years out of date, and it makes it look like you are careless about details. Your home page says "Copyright 2007 Teachspin" at the bottom left and "2013- Short Form Catalog" near the top left.

You have a meta tag with the copyright date, and the visual copyright at the pottom of the page. I marked them with ^^^^^^ so you can find them easily. You can open the pages with Wordpad or any other word processor as a txt file and edit them. You could use a CSS to reduce the stlesheet size on each page, as well. That would make the pages load faster. Since you are using javascript, I can give you some simple code that will let you update the notice on all pages with one simple edit to one file.

TeachSpin: Instruments for the Advanced Physics Laboratory

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.navigation { font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; line-height: 13px; color: #FFFF00; text-decoration: none; } .navigation A, .navigation A:visited { color: #FFFFFF; text-decoration: none } .navigation A:active, .navigation A:hover, .navigation .activenav A:visited { text-decoration: underline }

.topnavigation { font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; line-height: 15px; color: #FFFFFF; text-decoration: none; font-weight: normal; font-variant: normal; text-transform: lowercase; } .topnavigation A, .topnavigation A:visited { color: #FFFFFF; text-decoration: none } .topnavigation A:active, .topnavigation A:hover, .topnavigation .activenav A:visited { text-decoration: underline }

.subnavigation { font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; line-height: 13px; color: #000066; text-decoration: none; } .subnavigation A, .subnavigation A:visited { color: #000066; text-decoration: none } .subnavigation A:active, .subnavigation A:hover, .subnavigation .activenav A:visited { text-decoration: underline } body { margin-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; } .style2 {font-family: Verdana, Arial, Helvetica, sans-serif; color: #FFFFFF;} .style4 {font-family: Verdana, Arial, Helvetica, sans-serif; color: #FFFF33; font-weight: bold; } .style5 {font-size: 14px} .style6 {font-size: 12px} body,td,th { color: #FFFFFF; } .style7 { font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-weight: bold; } a:link { color: #FFFFFF; } .style8 {font-size: 14px; font-family: Verdana, Arial, Helvetica, sans-serif;} .style9 {font-size: 12px; line-height: 15px; text-decoration: none; font-weight: normal; font-variant: normal; text-transform: lowercase; font-family: Verdana, Arial, Helvetica, sans-serif;}

var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-28232338-1']); _gaq.push(['_trackPageview']);

(function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })();

Translations Available: 2013- Short Form Catalog   Home  |  About us  |  Users  |  Prices  |  Newsletters  |  Unique Support  |  Contact Us  |  Adv. Lab Physics Assoc.  |  Events 2013- Short Form Catalog Instrument Overviews diode laser spectroscopy earth's field nmr earth's field nmr gradient/field coil system fabry-perot cavity faraday rotation fourier Methods new hall effect magnetic force magnetic torque

modern interferometry muon physics   Apparatus Designed and Built by Physicists who have Taught in the Advanced Undergraduate Lab TeachSpin Instruments can be found in institutions all over the world See USERS for a complete list. "No Resident Expert Required" No matter what you call it, Advanced Physics Lab, Upper Division Lab, Junior/Senior Lab, Modern Lab, Optics Lab or even Great Experiments in Physics, TeachSpin apparatus offers your faculty and students a wide array of exciting and challenging hands-on physics experiments. Instruments By Course Title noise fundamentals optical pumping power/audio amplifier pulse counter / interval timer - NEW pulsed/cw nmr pulsed nmr quantum analogs signal processor/ lock-in amplifier torsional oscillator two-slit interference, one photon at a time ultrasonics - NEW  

Copyright 2007 Teachspin | ^^^^^^^^^^^^^^^^^^^^^^^^^^

It's better to just say "copyright" somewhere. I don't think the date is legally required.

Or don't copyright it at all.

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legally

copyright isn't required, the Berne Convention makes copyright automatic the US enacted it in 1989

-Lasse

legally

Not an option. All work is copyrighted by the act of creating it. The word "copyright" is superfluous, though might act as a warning to someone like Joe Biden but probably not.

legally

That's what I meant, delete the date or the entire tag.

Besides, an ad or a manual isn't a novel or a movie. Who cares if people copy it? I *want* people to copy our stuff!

Sometimes I write software with the comment "no copyright... use freely"

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Thanks Michael, I'll bring it to the attention of those who update the website.

George H.

You're welcome. It's the little things that make a website look professional, and overall it's a nice site.

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Yeah, that's mostly my opinion. If someone wants to copy my data, text or whatever, then go ahead. It's free advertising.

My boss doesn't want our manuals on line because he fears students will find them and copy the data as their own. I figure it's the professors job to catch cheating students, and putting manuals out there would be more 'free' advertising. (You can guess who 'wins' those discussions :^)

George H.

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legally

Since the Berne convention was adopted by the US (~'88), copyright protection is automatic- the work is automatically copyright upon creation. I guess you could add a notice that copying etc. was allowed if you wanted to opt out.

Inclusion of a copyright notice is a kind of technical legal matter (at least in the US and Canada), and it's probably worthwhile for a few reasons, but it's not overwhelmingly important unless you're the MLB association or something like that that goes around suing all kinds of folks.

legally

Technichnically, if I yell down to Mo that the Giants hit a homer while she's fetching us a beer, I'm "disseminating" and I could go to prison.