No oscilloscope lacking variable holdoff can reliably trigger on aperiodic or burst signals.
No oscilloscope lacking variable holdoff can reliably trigger on aperiodic or burst signals.Th issue with 5012H is that it never properly triggers on single time events. Not eve once. There is a firmware bug.
I disagree, the JYETech DSO112A I referenced above does quite nicely on anything I've thrown at it--used it recently to monitor the "Echo" pulse from an ultrasonic sensor, quite nicely and reliably. It also passes the 10 cycles of 10 kHz burst test the 5012H chokes on...
Does anyone have opinions about the 2-ch SainSmart Mini Digital Oscilloscope DS212 or 4-ch DSO213??
yeh, the DSO213 seem the most interesting of the cheapie portable ones, and also quite expensive for the specs, so perhaps do work better.
none of us would have bought it to see if it's really true or not.
I'm quite bothered by falsified specs.
That is the nature of the Beast. I do not know what else should happen to make people realize not to buy any meaninful T&M from China.
They flat out lie about the specs though and I will not reward that with a purchase.
They flat out lie about the specs though and I will not reward that with a purchase.
Sellers have exaggerated/oversold their products since before money was invented.
We have the expression "Caveat Emptor" specifically for that.
Proof is in the usage. The auto-triggering, the small size and the good enough battery-life has made this scope 2nd most used equipment after handlheld multimeters. Investment has been recovered many time over.
Proof is in the usage. For such a scope, one does not buy it and use it because of the 100MHz. There are better models came out, I am still holding to my wallet because this beast is good enough and there is always another better model down the corner. The auto-triggering, the small size and the good enough battery-life has made this scope 2nd most used equipment after handlheld multimeters. Investment has been recovered many time over. Can't say about a lot of high specification white elephants I had bought.
I opened a dispute on AliExpress with FNIRSI's Official store who sold me the FNIRSI-5012H.
Here is the FNIRSI's Official store on AliExpress claiming their FNIRSI-5012H meets their advertised specifications.
This shows you how blatantly dishonest FNIRSI is.
Meh. All this was known a year ago, there's multiple threads on here. Nobody was even surprised by the measurements, it simply isn't possible to make a device with those specs at that price. All we wanted was to see how bad it actually was.
FNIRSI aren't being dishonest (in their eyes), it's simply the way business is done in this world, eg. when did you last see a car that meets its official fuel consumption figures in the USA? Would you expect to get a refund for a car by making a fuss over it?
Open your eyes and you might see you now own a useful, cute, portable oscilloscope that didn't cost you much money.
They may not believe they are being dishonest--but they are, blatantly dishonest. That "...it's simply the way business is done in this world..." does not make it right;
The truth about the FNIRSI is all over the Internet. There's no point in acting all indignant about it if you've just bought one.
It is not specified how those 100MHz is "measured", so instead of -3dB,
I guess it's something like this: The max frequency where you can still
see (if you squint) it's a sine curve.
Let's load up the hair trigger double barrel shit machine gun and take them out!
Let's load up the hair trigger double barrel shit machine gun and take them out!Why would I take out manufacturer of a product I enjoy and that fits the need? So my only option is to buy $2000 Keysight?
I would rather everyone was honest with advertising, but even in that case Chinese vendors would not be first on my list.
It is like complaining about 1500W speakers. Just be real, and if you are clueless enough to buy those products on the provided specs, then does it really matter to you?