100MS/s PC Based USB Digital Storage Oscilloscope, DSO 2090 Review
This Compact, Low Cost Product Offers You the Features only Found in High End, Very Expensive Standalone Digital Storage Oscilloscope. It combines the features of a traditional standard Digital Storage Oscilloscope in one compact unit at fraction of the cost.
Price : $168.00
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100MS/s PC Based USB Digital Storage Oscilloscope, DSO 2090 Feature
- High Performance PC Based Digital Storage Oscilloscope Designed For Use With a Laptop or Desktop
- USB 2.0 port, No Extra Power Cord Needed
- 40MHz bandwidth, 100MHz real-time sampling
- Waveform on screen can be saved in TXT,JPG/BMP, MS Excel/Word formats
- Saved waveform files can be sent as email attachments
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Costumer review
64 of 65 people found the following review helpful.
A reasonable PC-USB Digital Oscilloscope for the money
By JOAT
February 13, 2011.
Updated on February 28, 2011.
De-rated to 1 star. See comments posted.
The Hantek DSO-2090 is at the low-end of digital-sampling-oscilloscopes (DSOs), in the PC-USB genre.
It has very good specifications for the price.
That said, it has its limitations.
Shipping box:
At first I thought one of the probes was missing from the box, along with the software CD and the user manual. However, looking deeper, those are tucked under the last layer of cardboard in a neatly designed retail box.
Installation:
The software and driver take about five minutes to install from the CD.
REVIEW UPDATE (2/28/2011): The CD has the latest driver for XP PRO, but not the latest software version.
The USB cable has two plugs, red and black. Presumably red is for power.
Operation:
The operation is extremely intuitive. Basic operation takes a few minutes to learn. In a few hours you can become very comfortable with most or all of the functions.
Sampling, saving and reloading data:
1. The waveforms of the two input channels can be saved as re-loadable CSV files.
NOTE: When reloading a waveform from a CSV file, the waveform always loads on channel one, turns off channel two, and stops acquisition.
2. The data from the two input channels can also be saved as DOC, TXT, or XLS files.
3. One of the two acquired waveforms can be saved as a separate re-loadable waveform that can be used as a reference waveform. This can be reloaded without disturbing the two input channels.
NOTE: This reference file has an RFC or REF extension, not CSV.
4. Setup-configurations can also be saved as re-loadable CSV files.
5. Snapshots of the application window can be saved as BMP or JPG files.
6. The math waveform, which is derived from channels one and two, cannot be saved. It is only for measurement purposes.
7. The FFT data can be saved as a DOC, TXT, or XLS file.
8. The displayed waveforms can be printed as a report page. The background is white, which saves toner or ink. I print mine to a PDF file using Software 995.
NOTE: Displayed measurements are not included with the printed report page, only the DSO settings.
NOTE: The FFT does not print with the report, but the math waveform does print.
NOTE: The printed report is a little bit glitchy. The reference waveform only prints correctly if it fills the horizontal display.
Up to five waveforms can be viewed simultaneously, but only these specific waveforms:
1. Channel-one that is being acquired, or a waveform that has been reloaded from a CSV file.
2. Channel-two that is being acquired, or has been acquired.
3. One reference waveform.
4. One math waveform, derived from channels one and two.
5. One FFT waveform, derived from channel one or two.
NOTE: This instrument is not designed to be a logic analyzer.
I have not tested the bandwidth or interpolation. At 100 Msps, interpolation is necessary to realize the full benefits of the 40 MHz bandwidth.
Setup and triggering:
There is an automatic setup selection that automatically configures the vertical and horizontal scales, and the trigger source and setting, based on the input signals.
Once a setup parameter is manually selected, the mouse wheel can be used to scroll through the range.
The automatic setup sets the trigger at 50 percent of the best signal. There is also a separate selection to automatically set the trigger at 50 percent of the selected trigger source. High-frequency rejection is also selectable.
The default pre-triggering for single-sweep is 50 percent of the horizontal scale. The pre-trigger limit is 100 percent of the horizontal scale.
NOTE: There is no time-delay triggering.
NOTE: It is possible to zoom horizontally at the trigger point of an acquired waveform. However, the only way to view the rest of the zoomed waveform is to slowly drag it with the mouse, which is tedious to the point of being unusable. It would be nice to be able to scroll through the entire zoomed waveform.
Minor annoyances:
1. Saving the reference waveform is only accessible from the menu. There is no tool bar button or shortcut for saving the reference waveform, but there is a button to toggle the reference waveform on and off, or to load it.
2. Saving the FFT is only accessible from the FFT window.
3. Displayed measurements share the waveform display. If there is overlap, the waveform position may need to be moved in order to read the measurements.
REVIEW UPDATE (2/28/2011): Note that the DSO inputs are not electrically isolated from the computer USB connections, as with some of the more expensive DSOs.
Conclusion:
You get what you pay for, but all in all, for the money, I like this product. It is fun to use, and the features work reasonably well.
Note that my basis for comparison is only comparative shopping, and my experience with older high-end laboratory DSOs, such as LeCroy and Tektronix.
Another DSO that is worth a serious look is the Velleman PCSGU250, which is slightly more expensive, with slightly less bandwidth, but includes a built-in function generator. From the demo software, it has a nicer user interface, a separate window for displaying all of the measurements without any fuss, and the printable reports include all of the measurements.
Other PC-USB DSOs are either much more limited, or cost at least $100 more.
34 of 35 people found the following review helpful.
A good DSO with a little problem
By James Hinkson
I was recently made aware of a problem with this DSO by another user. He is measuring long pulses while using the time base "roll" mode. In this mode the DSO is essentially a data logger. The DSO measured pulses that were considerably shorter than the actual pulse (timed with a stop watch). I tried the same tests and found errors also. A 60 second pulse measured 54.6 seconds. Using another and faster computer the DSO measured 56.5 seconds. This problem is clearly platform dependent. The guy who contacted me used a 10 second pulse and measured 5.8 seconds. He was using an old and slow laptop. He has tried communicating with Hantek without success. So if data logging is what you need, you might look for some other instrument. My original review is below.
I am a retired electronics engineer. I worked for over 36 years at Lawrence Berkeley National Laboratory. I was in the engineering division and matrixed to particle accelerators. My specialties were high voltage and instrumentation. I know a great deal about analog and digital oscilloscopes. I began my career at the Bevatron accelerator as an electronics technician in 1964. In that capacity I repaired and calibrated many of oldest scopes that Tektronix sold at the time. I even repaired the very first Tek scope that was sold to LBNL. It was called the Rad Lab back then.
When I left the lab in 2000 I was a senior electronics engineer responsible for instrumentation on the Advanced Light Source. I had a very good budget during the machine design and construction phase and purchased the highest performance scopes (and other test equipment) that Tektronix and others sold at that time. As the Tektronix product line improved over time I bought the best digitizing and sampling scopes they made. I'm not bragging. I'm just laying the ground work for what I'm about to write.
This little scope is a real winner. Yes, it has it limitations, but I sure got a real bang for my buck when I bought it. The probes amaze me because they are identical in appearance and function to Tektronix probes of 15 years ago or so. The software is is intuitive and easy to use. For example, when I want to see a frequency domain measurement of a signal from say a function generator (for example) I just use the FFT function to see the harmonics of a square or triangle wave. Simple opamp sine wave generators produce quite a bit of distortion. That is easy to see and quantify FFT display. The FFT display is in reality a digital spectrum analyzer. FFT data may be saved and later analyzed using Excel or any other similar software.
So, the scope is easy to set up and use. As yet, I haven't found a single thing to fault it for. I certainly will put it through some tests and will report anything that displeases me. My mantra when I was an engineer was K.I.S.S. = KEEP IT SIMPLE STUPID! This neat little scope qualifies in every regard. In my book this little beauty is a winner and deserves my highest praise!
For those who are not familiar with scopes and their uses I recommend requesting a PDF file provided by Tektronix. You'll have to fill out a simple request form, and then you'll have the document, "The XYZs of Oscilloscopes". Just go to [...]
You'll find some interesting material there. Once you've got the hang of it then get next to your work and get the job done. The Tektronix primers should help users avoid unrealistic expectations.
Okay, get busy! Work safely! Explore the scope's capabilities. Make MONEY! You get the picture. Enjoy your new toy.
6 of 6 people found the following review helpful.
Works ok, but bandwidth is less than 40MHz
By Anirban Banerjee
I bought the 100megasamples/s version. Works ok, easy to setup and use. Of course, the documentation is minimal, but if you're familiar with other 'scopes you can figure this one out.
However, don't believe the blurb that says the bandwaidth is 40MHz at 100Ms/s. It ain't so. I cannot get a 32MHz signal to show up. I believe the real b/w is close to 20-25MHz.
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