Download Free Software Owon Oscilloscope Hack

More searching around, and I eventually came across the Syscomp Circuitgear CGR-101, a USB AD/DA and IO box and software package claiming to offer a 20MS/sec oscilloscope, function generator, network analyzer, noise generator, programmable digital IO, PWM outputs, and more, for a retail price of under $200. OWON Digital Oscilloscope 1. Battery Pack Hack 2. Spectrum Analyser Hack (download this Python Program from the files listed at the end of this page).

I am looking for a new oscilloscope and I am considering an Owon sds7102 100 MHz scope. For $429 it seems to have a lot of great features. My current scope is 20+ years old and this will be like moving from the dark ages to the 21st centery. Does anyone out there have any experience using the FFT function on a digital storage scope? To my uneducated perspective it looks like a poor man’s spectrum analyzer.

What are the ins and outs of this function and its limitations. I have read the manual and read some tutorials, but you can’t beat the input from an experienced scope user. I know this is a cheap import scope,but for home use I think it might just fill the bill unless for some reason it turns out to have a big down side. Thanks, Jeremy Logged. I bought at Tektronix TBS 1042 and use the FFT mode all the time. In FFT mode its especially useful looking at receiver audio and also easy to see the receiver pass band width, as well as audio in the receiver pass band. As a 2 channel 40 MHz scope its very good too.

Works well beyond 40 MHz (derated specs) Read QST review a few months back. Display is 4 or 5 colors too. Easy to use, great tutorial start up disk, 5 year warranty. Run circles around my old Elenco S-1325 30 MHz analog scope. I found the Tektronix scope worth every penny I spent on it.

Great value for the buck. This scope samples at 1 giga samples per second as a result my understanding is that it should display returns up to 500 MHz in the FFT mode. I looked at some screen shots of this scope operating in the FFT mode and there is not much data displayed on the screen about what you are seeing. There was a marker for center freq and bd per division and that’s about it.

My understanding is that a 100 MHz scope is only good for accurately displaying signals up to about 20 MHz and after that there is about at least 3db of uncertainty in the amplitude of the displayed signal. Is this right?? I understand for $429 I will suffer some trade offs. I am use to using an old 20 Mhz scope with a 3 inch screen so like I said I think this is a big step up for me.

My main concerns are is this money well spent? For the same money would I be better off with a Rigol scope? How can I use the functionality of a modern digital storage scope to make home brewing more productive? Thanks for all the input!! For what its worth - I put together this video a while ago to discuss the FFT function of a digital oscilloscope, and how to control things like the frequency range and resolution. In a nutshell - the frequency range is DC to 1/2 the sample rate of the stored waveform record (which is often less than the max sample rate), and the frequency resolution is basically ~1/record_length in time (the longer the record length/duration, the finer the resolution). Bottom line, it can be difficult to get the resolution you want in order to look at things like filter shape, etc.

Because the required record length can be long (many milliseconds or more), and sample rate needs to be high enough to get the frequency coverage. This all adds up to needing a lot of memory depth in the scope, an ability to do FFTs on a very large number of samples, and a good way of zooming into a desired area. Maybe the video will help to explain it all a little better: Logged. If your need is for a spectrum analyser, then a Rigol DSA815 with the tracking generator option will meet your needs up to 1500 MHz.

Expecting an FFT oscilloscope to provide a similar function will probably lead to frustration. There are a few spectrum plots and a band pass filter sweep obtained using a DSA815-TG, on my 'Companion Transmitter' web page at: As per the other post, a relatively low cost SDR receiver will provide a spectrum analyser function usually to at least 30 MHz.

An SDR can be used to measure 3rd order IMD in an SSB transmitter and within the limits of it's frequency range also check for harmonics and other spurious signals. 73 Dave Logged. W2AEW ---- Thanks for pointing me to your very well made video, that helped clarify a few lingering questions I had.

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