AN: Open Instrumentation Project Progress

The site map link in the bottom right corner seems to work much better. It is much less confusing, and it gives better feedback to show where you have been and where you may like to go next.

You have all the available links on one page, which helps ensure you haven't missed one that might be interesting.

Unlike the javascript menus on the front page, the site map links change color to indicate which pages you have already visited. So you don't waste time returning to a page you have already seen.

The site map doesn't require javascript. This is a continual source of malware attacks, and although Michael's site doesn't have any problems, you always forget to turn it off when you leave and go somewhere else. You don't need javascript to obscure email addresses - there are many sites such as

Simpler really is better.

Regards,

Mike Monett

Antiviral, Antibacterial Silver Solution:

Try the "Home" button on each page instead of the back button.

An I2C controlled TV tuner, some analog stuff to do filtering / level detection and a microcontroller with integrated ADC is all that is needed. The firmware doesn't need to be fancy: set the frequency, read the detected level. Done!

No, thanks.

Hello Nico,

TV tuners don't typically reach below 35MHz and not above 850MHz. Some (but not all) also show a big void between VHF and UHF. And their dynamic range, oh, don't get me started on that one...

how about this:

• This driver is for USB parallel port adapters that use the Lucent
• Technologies USS-720 chip. These cables are plugged into your USB
• port and provide USB compatibility to peripherals designed with
• parallel port interfaces.

you'll find it in the linux kernel (kernel.org among other places)

drivers/usb/misc/uss720.c

Bye. Jasen

Any other "sources" for this than tv's ..?

Not really. Except for scanners but the cheap ones aren't very good.

You asked for something affordable... An additional mixer can be used to convert the higher frequencies.

Hello Nico,

Sure. I was just mentioning this because the "Done!" statement ain't quite true :-)

Mixing up the

I like you, spoiled childs ! :) The initial topic was about a 2MHz analog bandwidth oscilloscope and you've jumped directly to 1Ghz spectrum analyzer !

My opinions: TV tuner is quite nasty for a digitally controled VCO on

greetings, Vasile

Hello Vasile,

That's engineer thinking. Always looking for better, more, lower cost :-)

Well, what could you really do with a 2MHz scope?

Even my very first scope had 8MHz BW.

That could be calibrated out though, same with the input filter sloping.

Aaronia probably got the closest to a low cost solution but they do not offer a no-display and no-battery version. They should IMHO but they don't.

Hello Vasile,

the problem is not the USB (its 2.0 and fast enough) its the circuit itself. Thats why Aaronia is showing up a NEW unit in some weeks: The SPECTRAN#3. There are lots of rumors on that unit but whats for sure now is thats it will be very! very fast and cant be compared with the "old" Spectran V2. Propably thats what you (and others) are looking for ;-)

vasile schrieb: