What crap is that: higher sampling rate with more channels
Or it's always 75MS/s per channel
Or it's the other way 150MS/s one channel and 75MS/s two channels
hi bitem,
The spec looks fine, the 8bit [255 increments] Y axis is a little limited.
The advantage of this type of scope is its small footprint and portability and the fact you can store screen shots.
Also with care it will last a long time.
What's the spec of your PC?
Eric
EDIT:
follow up to hero's Q, what projects do you want to scope??
What crap is that: higher sampling rate with more channels
Or it's always 75MS/s per channel
Or it's the other way 150MS/s one channel and 75MS/s two channels
and further
Is that all
Use a PIC and send serial data to the PC and you will have better results!!
They aren't disagreeing about the scpecs. They're saying different things about different parts of the specification.
ericgibbs iss saying that 8-bit vertical resolution is poor and mcs51mc is saying that the sample rate might go down if you use more channels.
You appear to be getting stressed (this is indicated by your decision to use bold text), there's no need to get stressed, no one's arguing or having a go at you.
And Ebay seems to have a ton of them in the US. I know there is a UK ebay, I would look on there. You will be able to get a used scope for the same price range, maybe less.
If you want to examine signals like RS232 serial then the USB scope would easily get the job done.
It would also be OK upto 20mHz[clk] to examine the PIC's PWM output.
Most of the digital voltages will be in the order of 5V and the RS232 say +/-15Vmax.
If you wanted to measure very fast edges/pulses you would get some fall off in performance.
The reason I asked about your PC's spec was just to check that the PC may limit the performance of the USB scope,
the PC spec you have will give no problems.
If you had a steam driven MMX200mHz, running Win98 then this could have given problems.
You can buy S/H 'electronic' scopes, if you decide to go that way, check yellow pages for companies that resell S/H equipment,
also try a local industrial auctioneers.
You can get first class equipment for a good price. Always get a pair of good quality 1/*10 probes.
You appear to be getting stressed (this is indicated by your decision to use bold text), there's no need to get stressed, no one's arguing or having a go at you.