The Wiki and everything else is very confusing regarding firmware updates. The Wiki has nothing on the actual bandwidth. I did do a lot of searching, unfortunately that thread I did not find until after I'd bought it. Even Seeed Studio apologized for claiming 72MHz bandwidth, but never responded to what the actual bandwidth is. On Seeed Studio forums, there is a 12 page thread on the bandwidth. At one time, a 10MHz scope was thousands of dollars. Some claim that when using one channel, the ADCs double up and capture at 144Msps, so that claim of 72MHz doesn't seem outside the realm of possibility. I paid $175 plus $30 for two more probes.Įveryone selling this scope claims 72MHz bandwidth. "You couldn't find the information that I already know exactly where to find, so obviously you are lazy and a loser." It is also great how everyone rounds down prices. I just love how dismissive people are here. With a USB scope, at least you've got a much larger laptop screen.Īnother: That fancy aluminum case may seem like a good idea, but if you connect the scope incorrectly to your circuit, or the circuit has a failure that puts its ground live, then the case of the scope goes live.īut you haven't told us your requirements.
I've had problems with intermittent connections.Īnother: It is really, really tiny. Not a good idea on a probe that gets moved around, like a scope probe. But at some timing settings, the screen shows this weird double-humped signal, while the Tektronix shows the actual output remains unchanged.Īnother: The MCX connectors rely on the spring force of the metal. On the DSO 203, it looks like a sine wave.
#Sainsmart dds140 digital storage oscilloscope generator
Here's an example: At one specific gain setting, a square wave that looks fine on a Tektronix scope gains a nonexistent spike on the rising and falling edge on the display of the DSO 203.Īnother: The output of the signal generator at 4MHz looks OK on the Tektronix.
I'd get a USB scope before buying an DSO 203.