Owon PDS5022T Series PDS Portable Digital Storage Oscilloscope, 2 Channels, 25MHz, 100MS/s Sample Rate Review
The Owon PDS5022T is a 25 MHz, two-channel portable digital oscilloscope with a maximum real-time sample rate of 100 MS/s, a record length of 5 kpts per channel, edge and video triggering, two basic math functions and FFT, 20 automatic measurements, auto-scale function, and USB connectivity for electronics applications such as circuit testing, electrical engineering education, and hobbyist projects, among others. The oscilloscope has an external channel that can trigger from a third source while acquiring data from channels 1 and 2. Edge and video triggers allow isolation of specific signals and a trigger hold-off function stabilizes triggering on complex waveforms. Add and subtract math functions plus FFT (fast Fourier transform) along with automatic measurements such as period, frequency, and peak-to-peak enable an in-depth analysis of waveforms. An auto-scale function selects the optimal settings for displaying a waveform, and can be disabled for educational exercises. Up to four waveforms can be stored in the internal memory. The unit has a USB port for connecting to a PC and includes Microsoft Windows compatible software for transmitting data and remote operation. Additional specifications include a rise time of 14.0ns and various triggering features. The oscilloscope has an 8" color TFT (thin film transistor) LCD with a resolution of 640 x 480 pixels for viewing waveforms. It has European Conformity (CE) marking. It comes with two passive voltage probes; CD-ROM PC software; a USB interface cable; a power cord for 100 to 240VAC, 50/60Hz, CAT II; and instructions.
Specifications
| Display | 8" color TFT-LCD |
| Bandwidth | 25 MHz |
| Channels | Two + one external |
| Maximum real-time sample rate | 100 MS/s |
| Record length | 5 kpts per channel |
| Power source | 100 to 240VAC, 50/60Hz, CAT II or a rechargeable lithium ion battery (sold separately) |
| Dimensions (H x W x D) | 157 x 350 x 103 mm |
| Weight | 1.7 kg |
H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.
Oscilloscopes are electrical testing devices used to verify the functionality of equipment that generates an electrical signal. Oscilloscopes measure the voltage of an electrical signal over time, and display the measurement as a waveform in a visual graph. The waveform shows the sweeps (or refresh) of voltage on a vertical (Y) axis, and the time on a horizontal (X) axis. Details of a waveform demonstrate the signal over time. Most oscilloscopes have two or four channels for inputting a signal. Some digital oscilloscopes offer more than four channels, allowing channels to be dedicated to specific signals and applications. Bandwidth is the maximum frequency of a signal that an oscilloscope can capture. A constant image will display if a signal is shown at a high frequency. Oscilloscopes may be analog, digital, or mixed signal. An analog oscilloscope directly displays an input signal as a continuous waveform, typically in a luminous phosphor on a cathode ray tube (CRT). A digital oscilloscope converts the input signal into a digital format and reassembles the waveform for display, typically on an LCD. A mixed signal oscilloscope (MSO) displays both analog and digital formats. Some oscilloscopes can display more than one channel and type of measurement simultaneously. Some oscilloscopes can capture waveform signals to memory, and recall them. They may provide real-time intensity grading, and may have the ability to adjust frequency of display. Oscilloscopes can be powered with batteries or electricity, or may have a built-in generator. They are commonly used for testing, measuring, and inspecting in science, engineering, telecommunications, automotive, and electronics applications.
Fujian Lilliput Optoelectronics Technology manufactures electronic equipment such as LCD monitors, navigation systems, and oscilloscopes under the brands Owon and Lilliput. The company, founded in 1993 in China, has a U.S. office in City of Industry, CA, and meets International Organization for Standardization (ISO) standard 9001.
What's in the Box?
- Owon PDS5022T portable digital oscilloscope
- (2) passive voltage probes
- CD-ROM PC software
- USB interface cable
- Power cord
- Instructions
Price : $216.12
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Owon PDS5022T Series PDS Portable Digital Storage Oscilloscope, 2 Channels, 25MHz, 100MS/s Sample Rate Feature
- 25 MHz, two-channel, portable digital oscilloscope for electronics applications such as circuit testing, electrical engineering education, and hobbyist projects
- Maximum real-time sample rate of 100 MS/s and record length of 5 kpts per channel for acquiring detailed waveforms
- Edge and video triggers allow isolation of specific signals and a trigger hold-off function stabilizes triggering on complex waveforms
- Two basic math functions plus FFT and 20 automatic measurements for analyzing waveforms
- 8" color TFT-LCD for viewing waveforms
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Costumer review
70 of 73 people found the following review helpful.
By T. Ritter
When my Tektronix 2215 blew up (literally), in the middle of a project, after only 3 decades of service, I needed a new scope, and now. A day of research, an Amazon prime overnight, and I had a new scope the next day.
Moving from an analog scope to a digital one can be a bit jarring. Digital waveforms tend to have jaggies, both from digitizing the wave and the pixelated display, which really do not mean anything. Averaging is available to reduce digitization noise, at the expense of noticeably slower response (at audio scan rates). Visual noise is less with probes at x1, but that severely limits bandwidth, so, as usual, digital work probably would want x10. The bandwidth does not stop abruptly at 25MHz, but sampling is about 100M samples per second, so anything approaching 50MHz is going to be problematic in any case. That should have little impact for audio or video work.
The usual 2 probe channels, with independently adjustable gain, and the usual triggered timebase adjustments are of course present. However, on an old analog scope almost every new feature meant a new knob or two. On a compute-based digital scope, buttons are entry points into an extensive menu system which controls features not immediately visible by looking at the front panel. It is necessary to traverse the menu system to see what is available.
For example, the HORIZONTAL MENU button brings up a column of selections, one of which is Set Window. Selecting that by pushing F2 brings up vertical lines to define a window area, movable with the POSITION knob, and sizable with the SEC/DIV knob. Then selecting Zone Window with F3 expands and shows that subset area. This may be the closest thing to the second timebase (B delayed by A) in old scopes.
As another example, the CURSOR button brings up a menu with Type (F1) which steps through "types" as (horizontal) Voltage cursors or (vertical) Time cursors or Off. By adjusting the Position controls, cursors can be moved to points on the waveform, as the scope gives voltage or time measurements for those positions.
This is an excellent stand-alone machine. But one of my main desires was the ability to capture screen waveform graphics, for eventual use as a web file, as a sort of lab notebook. Doing that well on this machine is tricky. Although there is a USB connector on the back (USB 1.1 only, ugh), that is used to connect to a separate Windows computer, and does not support USB flash drives directly. One might expect the scope to at least work like a modern digital camera, with a removable SD memory card, but there is no such feature.
The Windows computer program essentially acts as a remote control for many of the scope features. But it does not seem to access even the 4 waveforms which can be saved in the machine, so saving examples found in the lab means moving a computer into the lab. Moreover, the program can save a waveform image, but just the image, and not the accompanying voltage and timebase settings. So we get the displayed waveforms, but we have no way to understand what they meant at the time the data were captured. So settings have to be written down and transferred manually, which is not great.
This bottom-of-the-line machine turns out to be an excellent choice for most work. It is relatively small, relatively portable, and quiet. Testing modern digital designs at full speed will need more bandwidth, but probably much more, beyond even the top of this line. Logic testing those same designs at lower speed may be an option in some cases.
33 of 35 people found the following review helpful.
By hunt16
I am a 40 year engineer. I have thousands of hours setting in front of oscilloscopes. I have used the best and worst of them. This is one of the nice ones.
I own GigaHertz Techtronics, old tube type Techtronics (for single event traces) and inexpensive production oscilloscopes. This DSO comes with all the parts and pieces including probes and probe accessories. It is ready to use out of the box. I believe the most important function of a 'scope is the triggering circuit and this one is 1st class.
It is a good product and I would reccomend it.
David
17 of 19 people found the following review helpful.
By Mark Twain
I bought this to use on our rework/test bench and while I haven't done a lot of testing with it yet, it seems like a very good choice.
The knobs and buttons don't feel as nice as our "good" Tektronix 'scope, but that cost about 40 times more than this one so I can easily forgive that.
The USB cable is odd, don't lose it! Also a bit short.
I downloaded the latest Windows software from the Owon web page and it works fine. I wish I could do screen captures like the Tektronix does, but the Windows program will be fine for general documentation of tests.
There is no fan, so you turn it on and there's no sound. Our big Tektronix has a fan big enough to rate hurricane warnings in our small office.
The channel buttons are color coded to match the probe color rings, nice touch.
The included probes are also nice, it saves me from using my much more expensive Tektronix probes.
No brightness adjustment for the screen, it looks ok under our current lighting but since it would have been nice to add brightness and maybe a screen dim function in the firmware.
Having a 12V power input would have been nice.
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