I am student/hobbyist and I would like to buy digital oscilloscope and Logic analyzer for my AVR and ARM projects. It is not cheap equipment, so I would like your advice on this.
What I need?:
Analyze protocols like I2C, SPI, RS232, "parallel bus" up to at least 20 MHz.
Verify correct timing for this speed.
Preferably 16 inputs, but I can live with only 8.
Digital (cursors, measures, pause, USB, etc)
At least 2 channels
Watch square signal at 20MHz (So targeting 100Mhz oscilloscopes?)
So my first choice was DS1102D (build in LA), but after watching this youtube review it seems that LA is not as good as it should be. (AFAIK No protocol analyzer :()
So I decided to buy LA and oscilloscope separately. I found Logic Sniffer from Dangerous Prototypes which seems to be really good and cheap (only $50)
Next thing is the oscilloscope:
I thought about same model (ds1102e), but without LA which is significantly cheaper.
But some people having troubles with it so I really don't know. Anybody have it? How long do you have it? How often you use it and do you have any problems with it?
Some short videos of defects:
Next option is to buy some cheap USB oscilloscope like DSO-2250. But I do not know if it is ideal solution. I am afraid of responsiveness over USB, build quality and of course physical knobs are better than virtual.
So what do you think?
Thanks for every comment or response.