Updating avid microchip
I did get a surprise one day when the supply tripped for apparently no reason. This is a 100 MHz USB MSO with two analog channels, eight digital channels (nine if you include the external trigger which can be displayed along with the other digital channels), and 4 mega-points of memory.Turned out an unused supply was current limited to 0.000 A. Chris Svec also has a GW Instek power supply: I have a GW Instek dual output power supply which is just okay - it's got a loud fan that runs all the time, and the voltage output seems to drift a bit, but that could be because I nudge the sloppy control dials unknowingly. The sampling rate is 100 MSa/sec (one-shot = 10 MHz) which is more than enough for the embedded work I do.
This USB MSO just seems to be better thought-out than others on the market.The unit itself is small and travel-friendly, packaged in a rugged aluminum housing, uses a standard 0.1" header for probe interconnects, and has wonderful support software (Windows, Mac, and Linux OS are all supported).At 24 MHZ acquisition rate, it's certainly not fast enough to handle external address/data busses on a high-speed modern u P or u C - for that, you need to shell out big bucks for a "real" logic analyzer.We find it invaluable for I2S and SPI issues, and it also has CAN, I2C, SPI and RS232 decoders built into the software. Scott Whitney also likes the , and is a 34 channel analyzer via USB connection, with 500MHz timing mode or 200MHz state mode.The cool thing about it is that it provides complex triggering, and directly decodes CAN, I2C, SPI, and RS232 data streams.I think I may have seen this analyzer mentioned by another of your readers in an earlier Embedded Muse issue, but I just cannot help but take the opportunity relate my positive experience with this tool.
I simply cannot say enough good things about the Saleae "Logic".
It uses clever data compression, essentially recording just changes on each pin, rather than the state of each pin at every clock.
You can order it with a trigger output - highly recommended if you work with mixed signals and want to see an analog waveform in relation to some digital pattern.
I purchased it shortly after it was released, on the _promise_ that they'd soon have a Mac and Linux client.
It took longer than I liked, since I had to run it in a VMWare virtual machine on my Mac, but eventually they released a cross-platform software package. Finally an embedded tools vendor that understands there's other operating systems out there than Windows.
All in all, a very nice and capable unit that I use on a daily basis. Jerry Isdale wrote: I recommend taking a look at the offerings from Seeed Studios.