I firmly believe that every job is easier with the proper tool. Often times, when troubleshooting an issue with one of my hobby robotics projects, the proper tool is an oscilloscope. However, my hobbyist budget doesn’t allow for the purchase of a full-feature benchtop digital ‘scope. I also don’t use it often enough to justify spending a lot of money on a ‘scope. Admittedly, I also don’t know enough about all of the intricate details of fully utilizing all of the capabilities of a ‘scope. Therefore, the best solution for me is one of the many brands of inexpensive ‘scopes which rely on a PC (usually a notebook) for the display and the data capture. Through my employer I was able to get my hands on a BitScope. In this article I’d like to describe the ‘scope and my experience with it.

First off, the BitScope is shipped from Australia so they don’t generally show up overnight, just in case you require instant gratification from your electronics purchases. This ‘scope arrived in about a week, none the worse for wear.

The reason I selected this particular ‘scope was, first and foremost, because it’s officially supported in both the Linux and the Windows environments. I’m a Linux user but my employer is an all-Windows shop.

I ordered a model BS325. The back of the unit I received appears in this photo:

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This brought me to the first wrinkle. The sticker makes it seem like I received a BS326N. I extracted the board from the metal case (which is very easy to do and a nice part of the design) and looked closely at the board itself.

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The board is clearly labeled “BS325N” but the sticker on one of the modules clearly states “BS326N”. At this point I assumed those two model numbers are equivalent.

As I mentioned earlier, this unit only has an Ethernet interface. BitScope also includes a crossover cable, for a direct connection between the ‘scope and my notebook computer. Herein I encountered the next wrinkle.

I attached the crossover cable to the ‘scope and my Windows notebook. The Data LED lit solid but not the Link LED. I moved the cable to my Linux notebook but saw the same behavior. Through some more experimentation, I’ve since determined that the labels on the LEDs are switched: The LED labeled “Data” is actually the “Link” LED. Again, not really a big deal.

The next thing to do was to actually configure and try the software. BitScope includes a CD with the software for Linux, Macintosh and Windows. Seeing this warmed my heart. I installed the software on my Windows notebook and my Linux notebook. Then I attempted to connect the software to the ‘scope. Yes, next wrinkle.

The page in the included paper manual looks like this:

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Since I had ordered a BS325N, the board said BS325N and the stickers said BS326N, I assumed I should use the factory IP address for the BS325N. Nope. The IP address actually assigned to the ‘scope was 192.168.1.73, the one listed for the BS310N. Once again, not a big deal.

I did manage to start the software, connect it to the ‘scope and query the ‘scope. The Windows software identifies the ‘scope as a “BS032600”, by the way. I made a few simple tests and played with the software a bit. I tried the same simple tests on my Linux notebook, but the bitscope-dso software complains and then aborts.

I’m still satisfied with the ‘scope and happy to have it. Obviously, their manufacturing quality control needs some improvement but it’s not keeping me from using the tool. I had also contacted BitScope Technical Support when I was looking at the lack of Link issue. It took them almost two days to respond and I was disappointed to receive the all-too-common Technical Support response. Essentially, I was told “This is almost certainly your problem. Check your firewall and network configuration”. The Technical Support staff apparently either didn’t read my note or doesn’t understand networking issues.

Next, I plan to use the ‘scope to troubleshoot some actual conditions in my lab. I’ll provide some more details on how the device worked for me.

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