Currently, digital signal circuits in embedded systems have signal transmission rates ranging from tens of kHz to hundreds of MHz. In order to develop faster and more powerful products, people have been constantly improving the speed of signal processing and transmission rate. For example, ADI's Blackfin series DSP has a core clock frequency of 600MHz and a system clock of 400MHz. In the case of data transmission on I/O ports, the limit frequency is usually not adopted by designers considering noise and stability of data transmission. However, in order to improve the data transmission speed, the transmission rate of 100MHz ~300MHz is increasingly adopted.
In the face of the current transmission speed is getting higher and higher, the 60MHz ~ 200MHz bandwidth oscilloscope provided in the test field is a little stretched.DS1000A series oscilloscopes, bandwidth up to 300MHz, sampling rate up to 2GSps, waveform capture rate up to 2000wfm/s, can well meet the current digital circuit testing requirements.But its price still maintains for the mid-end oscilloscope's price, is in the global scope cost-effective advantage prominent oscilloscope.
In the selection of oscilloscope, in addition to the digital circuit development engineers should pay attention to the performance indicators, oscilloscope has the trigger function, connection function, archiving and analysis function is also more and more prominent as a good debugging assistant should have.
Engineers hope to capture waveforms in a variety of ways.In addition to the usual edge trigger, some advanced trigger functions, such as pulse width trigger, slope trigger, video trigger, and alternately trigger, can help engineers capture specific and more interesting waveforms.For example, using the pulse width trigger could help engineers detect the occasional narrow pulse in the bus signal transmission, and thus the cause of the data transmission error.