Koolertron Upgraded 15MHz DDS Signal Generator Counter,High Precision Dual-channel Arbitrary Waveform Function Generator Frequency Meter 200MSa/s (15MHz)

 Product works great and signal is clean when measured on a Rigol scope. See video for demonstration of use.

I tested pretty extensively, and it's impressively accurate. For the price, the company seems to make the best signal generators you can get by a mile. Controls are smooth and functional, display is fine, and comes with clips.A couple things to note:1. It's super light. The board inside looks to be the same board used with their portable model: https://amazon.com/Koolertron-Precision-Generator-Dual-channel-Frequency/dp/B07597TJPC/ Works great, but means that the thing slides around on a bench very easily. Hot gluing it down or securing some weight inside it fixes that.2. As usual, the rated frequency only applies to the sine wave. The biggest difference between this and a higher end piece of kit is that with this, the other (non-sine) forms degrade more / at lower frequencies. So you couldn't use the square wave, for example, as a harmonic generator for driving UHF resonators or the like. But if you want to do that, you'll have more specialized equipment anyway - something like WindFreak's stuff.3. The max amplitude of 20V only applies up to a frequency of (IIRC) 10MHz - after that it's 10Vpp. Most generators limit to 10V or maybe 15V from the start, so it's nice that this does 20 for much of the range.4. What really impressed me is that they have the frequencies and impedance as accurate as they do. They clearly tested and calibrated this thing thoroughly. Just a great piece of equipment at a killer price.

When you first get it out of the box, the weight makes you think you have been had. This must weigh about 4oz!! But this thing actually performs quiet well. I took a gamble on this, but it does it job as expected at this price level. The interface is intuitive, and easy to use. You don't need to read the manual. The connectors that it comes with are pretty crappy, offering lots of noise if you jiggle them, but they work. I hooked this up to my O scope, and it performs as expected, offering frequency that is very stable and correct. The square wave rounds off a little at very high frequencies (> 10MHz) but it does the job. Looking inside, there is plenty of room to glue a brick in there so it does not move around on my bench, but the actual design looks good, and is built using quality chips (e.g. an actual Lattice FPGA). Overall it does its job well for the price.

As an embedded engineer I need signals to test ADCs off and on board with . This works great. You can save your settings and they are there at startup. Someone said it goes to some default which could be dangerous, but mine doesn't. It does have saving for settings. Perfect for your typical demo board your developing on. If you need some high voltage or fast highly accurate signal, this is not for you. You can see the steps. Not sure of the 10bit or 12bit, but you can see the steps at higher voltages.It will produce a 3V Sine 1.5V DC offset signal for typical board input without blowing your board up at every powerup once you have saved this setting.This and the Rigol 1054Z 4 chan scope +upgrade(see youtube) are your best desk buddies for less than $500.

This signal generator is fantastic! Hooked it up and began using it straight away. The front panel controls were intuitive and the unit works perfectly.The accompanying software is delivered as a single compressed .RAR file, which isn't great. It should be a properly formatted install disc, but I have 7ZIP so was able to uncompress it and figure it all out easily enough. The Windows UI for the generator is very nicely done!My only complaint is the length of the power cord. The A/C cord on the power converter is like 2.5 feet long! Perhaps that works on somebody's bench where you have power readily available, but for me it means I need an extension. It can't cost much to add a couple of more feet to the power cord. Still, the unit is a tremendous value, so I won't deduct any points for the short power cord.*** HIGHLY-RECOMMENDED ***

Koolertron 15MHz DDS Signal Function Generator11-25-17I posted the highlighted text as a review in AmazonWithout a doubt, the Koolertron 15MHsz DDS Signal Function Generator is exactly what I needed to significantly extend my understanding of microelectronics.This purchase definitely moved me closer to understanding the field but I noticed that the “Signal Function Generator” was often mentioned in the same literature I found when I read about the oscilloscopes.I realized I needed to get a signal function generator if I wanted to really understand how to use an oscilloscope. The generators I found, new and used were expensive but in my search, I came upon the Koolertron 15M DDS.This unit is as valuable to the expert as it is to the novice but from a novice’s point of view, I must say that this is EXACTLY WHAT YOU NEED if you’re want to take a big leap forward in your understanding of electronics and oscilloscopes!However, the Koolertron has an incredibly intuitive control panel and without exaggeration, I understood the functions and modes within 15 minutes of plugging it in.In addition, it has a very good software package that allows you to create your own waves and frequency combinations. After you save them, you can disconnect the unit from the computer and use them for any applications you wish.It seems to have most, (if not all), of the same features as the more powerful, expensive units. I couldn’t get over how easily and quickly I was able to understand the various selections and their purposes.I strongly recommend this unit and btw, you can find many tutorials and various bits of information about it on line as the “JDS-6600-15M” signal function generator.I found the information for the Koolertron 15MHz and the JDS-6600-15M to be applicable to each other so there’s no shortage of on-line “How-Tos” to learn from.As I said, this is an important tool for both experts and newcomers and the price is one of the best!Rich