Logic Pro 8 (Black) - Saleae 8-Channel Logic Analyzer

Product Information

ericwertz – if you need to look at 50mhz digital data, then 100Mhz sampling is not nearly enough. Nyquist theory is meaningful for analog analysis, and is a limitation that applies directly to the highest frequency pure sine wave component of the signal – exclusive of phase. Digital analysis is very different. You could barely represent a square wave sampling at Nyquist, and thus would get virtually no timing information from the resulting waveforms. You’ll need to sample 4-10 times your bus rate to get meaningful timing information.

Most modern electronics projects will benefit more from a logic analyzer than an oscilloscope. An oscilloscope displays a graph of an analog voltage as it varies over time, such as the curve of a sine wave. A logic analyzer only detects high and low digital states, but it records many signals simultaneously. Logic analyzers dump data to a computer for analysis, very few oscilloscopes have this feature. Logic analyzers take the guess work out of debugging inter-chip communication. If you can’t see what’s going on, the best you can do is guess about the problem. When a project won’t work, 99% of the time we can solve the problem immediately by looking at the signals with a logic analyzer. Without it, there’s no easy way to know what’s happening. File format support. Supports various input/output file formats (binary, ASCII, hex, CSV, gnuplot, VCD, WAV, ...). We also tried the 1-Wire decoder with a DS2431 EEPROM. The software identified the 1-Wire reset command, and the 1-Wire ‘search rom’ command (0xf0). There’s a four level trigger that watches the signals, and waits for a specific combination before it starts recording samples. Since we’re analyzing SPI, the most logical place to start capturing is when the SPI enable signal drops at the beginning of a bus transaction. We set the Logic trigger to start sampling when SPI enable is 0 by changing its trigger to ‘0’.Broad hardware support. Supports many different devices (logic analyzers, oscilloscopes, multimeters, data loggers etc.) from various vendors. A logic analyzer records bus communications between two chips. If you’ve ever had a problem getting two chips to talk, or wanted to reverse engineer a protocol, a logic analyzer is the tool you need to spy on the bus. Ian – re other products: I don’t want to post a commercial for anyone, so I won’t mention my favorite by brand name. Just do a google search for “logic analyzer”. There’s about a zillion products in this price range out there these days.

We’ve covered Pulseview being used in combination with cheap accessible analyzers before — a must-watch if you need to get yourself up to speed on the value they provide to a hobbyist. If an oscilloscope is what you need and a smartphone is what you have, perhaps you’ll enjoy the Scoppy firmware for the Pico.Big DNL spikes caused by an apparent mismatch between capacitors used in simulation and production, James Adams confirms. The sigrok project aims at creating a portable, cross-platform, Free/Libre/Open-Source signal analysis software suite that supports various device types (e.g. logic analyzers, oscilloscopes, and many more). The Logic records 8 channels at 24MHz. The Windows software has useful features, and there’s an SDK if you want to write your own apps. Linux and Mac versions are under development. We really like this logic analyzer, and plan to use it to illustrate future articles. This transaction shows the host issue the read configuration register command (0x05), and the SRAM response (0x41). Now if I could only find a decent USB 2.0 oscilloscope. I think though, that that’s one realm where I still need a real device, perhaps with a decent USB transfer and control interface. 250MS/sec+, 2+ channels, 600V+ and decent triggering options (say an external trigger that I provide with the logic analyzer?)