Find a device or software that can view waveforms for a longer period of time

乱世煮酒论天下

Find a device or software that can view waveforms for a longer period of time [Copy link]

Now I want to see a data transmission waveform of 485 communication. Because the time range to be viewed is relatively long, and the specific protocol needs to be checked based on the transmission level, I would like to recommend a device that can view the transmission signal for a long time. The time range of the oscilloscope is relatively short and not suitable. Is there any other device that can view the level signal for a long time? Or is there any device that can be used with the host computer software to view the level transmission signal of the communication process on the computer? And can the host computer also review the waveform, save the waveform, and expand the waveform?

大小家伙好

Logic analyzer, Dslogic (Dream Source) or copycat saleae

The former is a few hundred yuan, the latter is a few dozen yuan

秦天qintian0303

Does the oscilloscope also support host computer software? I seem to have seen it before, but I didn't pay attention to it.

wangerxian

How long? The logic analyzer seems to be able to monitor for several hours, but the frequency will be lower, tens of KHz

dfwisdom

An oscilloscope is recommended. The host computer stores waveforms. It is recommended to send typical commands: such as the longest send and return messages, special operation messages, etc.

Capture the sent and received messages in a second-level cycle, and then zoom in and out the waveform to see the details

sint27

Logic analyzer with automatic decoding 485

chunyang

Use a logic analyzer that supports 485 protocol analysis, the "virtual" kind, that is, the kind that relies on a PC to work, and the price is not high.