CuriousInventor posted a basic introduction to logic analyzers for those looking to get started with such test equipment –
A logic analyzer isnâ€™t the most common piece of equipment in a hobbyistâ€™s shop, so we thought weâ€™d write a small introduction about what it is and what itâ€™s good for. A logic analyzer is commonly used to debug circuits where two or more chips are talking to each other, like a central uC interfacing with external memory, a peripheral camera or mp3 decoder. The main advantages over an oscilloscope are that more than 4 channels can be watched at the same time (sometimes more than 80), and that the logic analyzer can trigger / record right where itâ€™s needed, not just on the first (or every) rising edge. For instance, you could program one to trigger and record data only after a particular byte sequence occurs.