Seesii Professional Upgraded DDS Signal Generator Counter, 60MHz LCD Display High Precision 200MSa/s Dual-Channel Arbitray Waveform Function Generator Frequency Meter

Purchased to be used in vintage audio repair and test anything with a single path. You will be amazed at how many other uses you can find for this device after owning it for awhile. I mounted this device. on my repair bench next to my telescope and power supply for nearly 3 years. It works just as well today as it did the first day I got it. As a signal generator, this is a great investment.

Works great and reasonable price.

I am using this to generate signals at specific frequencies with any of several waveshapes. I also use it to measure frequency of externally generated frequencies. It is quick and easy to use. Dual channel certainly helps. HOWEVER - when I measure the output of my precision 10 MHz frequency standard, I find an error in that the Seesi counter indicates a frequency about 12 cycles high. My standard is precise to e1x10-12 so I know the error is in the Seesi. That is not much error and is probably adequate for most uses. The claimed precision is 0.1%. so this is well within the stated precision.

I got a 2nd unit after the 1st unit had some issues (burning in) after being powered on for 6hrs each day. They both have overshoot when Frequency gets up on the leading/trailing edge square waves. Does not show up on other waveforms. 1st unit lost the Pulse Width feature (only works in a couple waveforms not all of them.) Price point is good as it's a "light-weight" unit with featured that are nice to have, would not consider it to be a LAB-GRADE unit but ok for hobbies.

Update: Seller reached out to me the day this review went live and offered to replace the power supply that was bad. Changed the review to four stars as the function generator is good and the product support was great. Overall not a bad function generator for the price. It has worked well for everything I have needed to do with it to this point. The signal does pull down a significant amount with a load but I figure that is to be expected in this price range. Now on to the dinky power supply they provide with it... I kept seeing weird anomalies in the readings on my scope. I suspected the power supply included with the function generator to be the issue so I switched the generator to use my adjustable power supply set to 5v and suddenly the anomalies were gone. Connecting the output of the power supply directly to my scope set to AC coupling produced the picture attached to this review. It is possible that I just got a bad one but it seems unlikely.