I am aware of the limitations of this kind of product, but I am going to buy either hantek 6022B or DDS140,or DDS 120. I am aware of tehnical specifications (by wich dds140 is the best from these 3 Products)
A couple of months ago I thought exactly the same direction
![Cool 8)](https://www.eevblog.com/forum/Smileys/default/xcool.gif.pagespeed.ic.cOxV6sPNRd.png)
Some words to the trigger.
Sadly it's not very stable as I'm used in former times with my old analog Hameg.
Nevertheless it's usable for timebase > 1 us, on shorter base the signal is runnin' thru..
CH2 can only be triggered together with CH1, a lonely CH2 is running to Mars.
I do not think, the external trigger will change anything, it's just another base.
I guess that the module s only an enclosure for the two lines.
Have a look on my oics above, they are connected to pins 1 and 4 on the bottom row.
You can stick to with a Dupont jumper.
Sometimes CH2 is very noisy, until now I couldn't evaluate the reasons.
The greatest disadvantages IMHO are the input dividers..
![ThumbsDown :--](https://www.eevblog.com/forum/Smileys/default/icon_thumbsdown.gif.pagespeed.ce.D027Y9gZ7m.gif)
The max. possible positive voltage is ~6V, the max neg. voltage (DC) sometimes 1.6 V, sometimes 3.6 V, max possible neg. voltage AC ~5V.
Result: At logic level you need an external 1/10 divider.
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/xfacepalm.gif.pagespeed.ic.EBDwh1hCfo.png)
My reason for buying were the 200MSa, 'cause I wanted a "real" 20 MHz scope.
If you can live with an absolutely shitty software you can work with.