| Electronics > Beginners |
| Which logic analyzer? |
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| tggzzz:
--- Quote from: rstofer on November 10, 2018, 11:12:23 pm ---I don't see either tool, LA or scope, as being acceptable replacements for the other. They do different things in different ways and both have a place on the bench. But the order in which they are needed may favor buying one before the other. Price is also a factor. If a LA will do the job, it will likely be a lot cheaper than a scope with decoding. --- End quote --- Precisely. Screwdrivers for screws and spanners for nuts. Decent LAs aren't cheap either. Plus when considering either a scope or LA, appropriate probes are vital and surprisingly expensive for "mere bits of wire", ahem. |
| 2N3055:
I find Digital Discovery to be very useful. It can be used as simple pattern generator. It has huge memory depth compared to others cheap ones. You can do scripting, ROM logic etc etc.. It has protocol triggers and decodes and can generate UART,SPI, I2C, CAN. It can also work in sniffer mode. All in all very useful. Software is meh but kinda works... Regards, Sinisa |
| rstofer:
--- Quote from: 2N3055 on November 11, 2018, 01:29:59 pm ---I find Digital Discovery to be very useful. It can be used as simple pattern generator. It has huge memory depth compared to others cheap ones. You can do scripting, ROM logic etc etc.. It has protocol triggers and decodes and can generate UART,SPI, I2C, CAN. It can also work in sniffer mode. All in all very useful. Software is meh but kinda works... Regards, Sinisa --- End quote --- Yes, indeed! I have the Digital Discovery (along with the Analog Discovery2) and the only reason I didn't mention it is that the AD2 has so many more features that are useful when other equipment is scarce. Given a signal generator, scope and whatever, already on the bench, adding the Digital Discovery makes a lot of sense. The DD could be the first bit of equipment if a person only wants to do digital but as soon as they turn around, they're going to be stuck. There is always an application for measuring analog kinds of things. |
| 2N3055:
--- Quote from: rstofer on November 11, 2018, 04:06:03 pm --- Yes, indeed! I have the Digital Discovery (along with the Analog Discovery2) and the only reason I didn't mention it is that the AD2 has so many more features that are useful when other equipment is scarce. Given a signal generator, scope and whatever, already on the bench, adding the Digital Discovery makes a lot of sense. The DD could be the first bit of equipment if a person only wants to do digital but as soon as they turn around, they're going to be stuck. There is always an application for measuring analog kinds of things. --- End quote --- You are completely right about that. Topic is logic analysers (digital only), so I just pointed out that DD is superior in some regards to many other LA mentioned. But as a single device AD2 is unsurpassed in how useful it is.... Regards, Sinisa |
| Housedad:
From what I have done with it, I am very happy with my Digital Discovery. Yes, it is not as versatile as the AD, but it does digital alone far better, IMO. I have all the other test instruments, and wanted an LA for micro controller development. It fits that bill just right. If you use the ms/s divided by 5 equals usable bandwidth, and keep in mind the DD and the Saleae are both hardware limited to a maximum of 100MHZ bandwidth, the Digital discovery upper limits become: https://reference.digilentinc.com/reference/instrumentation/digital-discovery/reference-manual 8 channels at 800 ms/s max 100 mhz 16 channels at 400 ms/s max 80 mhz 32 channels at 200 ms/s max 40 mhz The Saleae 16 limits are: https://www.saleae.com/performance-calculator/ 6 channels at 500 ms/s max 100 mhz 8 channels at 250 ms/s max 50 mhz 16 channels at 125 ms/s max 25 mhz keep in mind the Saleae 16 is four to five times the price of the Digital discovery and has less bandwidth the more channels you add, and has half the number of channels at half the bandwidth at the far end The only advantages Saleae has in my opinion, is better software and it can do rather low bandwidth analog signals. For pure digital though, I think the Digital Discovery beats it hands down. |
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