DOMINTY Function Generator AC100-240V FY6900 60MHz Double Channel DDS Function Arbitrary Waveform Signal Generator Frequency Meter 250MSa/s Sine Square/Triangle/Pulse/Sawtooth Wave/Staircase Wave

lots of usages, more than the manual ( what there is of it ) state. lots of online usages and how to

I bought the signal generator to test or simulate conditions in radio circuits, mostly in AM or FM modulation below 60 megahertz. Those that have an interest in ham radio will appreciate the fact that it does other modulation types like phase modulation, FSK, ASK, PSK. There is another one called Burst mode. There'll be at least five parameters that you can adjust, on each signal, but not always the same ones when producing a signal. Things like frequency, the phase, the amplitude, DC offset and more.I have shown, in the first picture, a 400 Hertz triangle wave. In the same picture, it's like a journal of the oscilloscope shows a 5 kilohertz sign wave. When I push the mod for modulate, it mixes the two signals to produce what's shown in the the second picture where it depicts a AM signal modulated at 100% with a triangle wave. Most AM signals, far as I can tell, are modulated at 200%. The signal generator allows you to adjust the percent of modulation anywhere from 0 to 200%.The third picture shows a square wave at 30 millivolts.The fourth picture shows an ECG wave at 30 millivolts at a slow rate of 1.2 Hertz which simulates a heartbeat of 72 beats per minute.The last picture shows a wave that looks like the output of a full wave Bridge rectifier. That could be useful when demonstrating how to use a capacitor to produce a smooth DC power supply to somebody learning basic electronics or engineering.I haven't checked out the software that you can download yet, so I can't comment too much on that but I suspect it makes a signal generator more useful. Right now, at the time of writing this, of the possibility of sending a digital code to test digital circuits, like the TV, when your girlfriend has the remote control and you feed the signal through a diode to change the channel.The documentation that you can download I had printed at a copy shop for a reasonable price and I put that in a 3-ring binder. It seems to explain peak-to-peak voltage and RMS values well but strangely it doesn't go into much detail about using the four connectors on the back. However the signal generator seemed to to be self-explanatory of this when I had an option to use one of them as a source signal for amplitude modulation. On the most part I found that I didn't need the instructions so much, the signal generator was fairly intuitive. It does take a little bit to get used to, at first, but after that it becomes pretty easy.I wanted to add that I'm quite satisfied with the seller that is identified as the smileshop 2018. Originally I had a problem with the first generator I purchased. I had been hurting on time and pushed the 30 day window to return. When I first checked it, I thought I looked at everything but I didn't check it at smaller voltages. The prior one at 29 millivolts look rugged at the output. When I pointed this out to the seller, the seller offered to refund my money. I like the idea of what the signal generator could do so much, I asked if we could exchange it. The seller agreed and sent me another one out FedEx and I didn't have to return the other one. If you suspect you have this problem make sure to use the BNC to BNC cable to help inspect your signal generator.

Works great for aligning IF & RF with AM modulated signals. Great addition for antique radio restoration bench.

I purchased one of these while doing an online electronics course to make it a bit easier to do the lab example work. Got tired of trying to produce waveforms using an ESP32 or STM32 boards. This is a low cost piece of equipment but it does work and does have some limitations. I have not explored all of the idiosyncrasies of this equipment and I don't plan to do that but it does what I need very nicely for the price. The firmware shown is v1.7.2 and I think this is the latest. The other pic is something that definitely needs to be changes. What you see is a replacement for the original very low profile knob. Even with the small detent in the original knob it was hard to grip and spin to change parameters. This replacement is about 3-4 times thicker, or taller, than the original and makes it much more comfortable to grip and change settings. This is a must have for this unit.

This is a very neat little, and I do mean little, instrument. All functions I have tried have worked just fine; however, the very small display is a challenge. I use AWG's infrequently, only when I'm working on an occasional project. If it is to be used it daily, I highly recommend a different AWG with a much larger display. The FY6900 replaces an older AWG with a grossly inaccurate rotary dial (Wavetek-166), plus it has a sweep function which my older analog signal generator lacks (HP 651A). The FY6900's display is spot-on but small. No manual was included with the instrument but is available on-line or just watch a video particularly for saving a setup, otherwise, it is very intuitive to operate. I'm still rating it five stars as the small display is my personal issue. I should have considered that more closely than I did. Lastly, it has a soft power-on switch. I solved that by attaching the Vac cord to a power strip which I turn on when I need to use similar instruments with soft start switches or internal ovens.

It's hard to beat the features packaged in this unit given the price. The USB connection is a great aid, but the software is poor.The unit has a supposedly 250Msa/s capability, which I doubt. Maybe the amplifier is poor, the best rise/fall times are no less than 10ns (expected 4ns), regardless of frequency. That also leads to a drop in the amplitude as frequencies exceed 30MHz or so.The frequency/counter sensitivity is fairly poor, it takes close to 1V. There are multiple gate times, but no averaging for long periods/low frequency signal to get a reliable average. It looks like the counter is using a different time base than the generator, a 1Hz signal reads 1,00,000,804ns (???).The time base was quite off from the factory (over 10ppm). I did some surgery and upgraded to a TCVCXO which brought it within 100ppb at room temperature.Overall not bad, should satisfy most hobbyists, but it could have been better.

This is far from a professional instrument, but if you are just starting out learning electronics then I highly suggest this for the price and the many waveforms it can produce. It has its limitations but really I think this is the best for someone just starting out, or who is a hobbyist or taking a class and wants their own equipment at home. It got me through my physics dept. class on applied electronics and instrumentation class and kept me out of that horridly sterile and depressing lab.