Several questions about digital phosphor oscilloscope

Digital phosphor oscilloscopes are powerful and can capture, display and analyze complex signals. With flexible sampling methods and automatic digital measurement functions, they have become the best in the measurement field. The commonly used TDS3000 series has a sampling rate of 1.25-5GS/s and a bandwidth of 100-500MHz. The TDS500/700 series has a sampling rate of 2-4GS/s and a bandwidth of 0.5-2GHz. DPO has such superior performance, so of course it will not be cheap. In order to give full play to the performance of DPO, it is mainly used for the detection of complex signal flares.

Question 1: How can we test the signal quality of 100M Ethernet and Gigabit Ethernet in a simple and easy way? How many desktop devices are recommended? How many portable devices are recommended?

Answer 1: The Ethernet physical layer signal quality test can use the industry-wide solution provided by Tektronix. Question

2: How to perform power supply testing with a digital phosphor oscilloscope?

Answer 2: Tektronix provides a full set of power supply testing solutions, including various current probes, voltage probes, and analysis software. The testable current amplitude ranges from 1mV to 20KV, and the bandwidth ranges from DC to 2GHz; the testable voltage ranges from 1mV to 40KV, and the bandwidth ranges from DC to 1GHz (low voltage can reach 16GHz), which are the widest ranges in the industry. The testable items include: switching loss and safe working area of ​​switching devices; inductance, magnetic loss, BH curve, conductivity of magnetic components; ripple, power factor, current harmonic analysis of power supply, etc. Among them, many test items are only provided by Tektronix.

Question 3: Application of digital phosphor oscilloscope in automotive electronic design and debugging.

Answer 3: Digital phosphor oscilloscope provides timing and protocol decoding and analysis functions for CN bus and LIN bus. It can synchronously decode control networks with CN and LIN buses, and test transmission accuracy and error tolerance between networks. Network synchronization faults can be located by testing crystal tolerance and transmission delay. Fault debugging on the data link layer is realized through the integrated search function. Through the eye diagram test of CN signal, the noise on CN data packet caused by jitter, amplitude distortion and burr can be analyzed. Complex trigger conditions can be used: frame type (data, remote, error, overload), identifier, data, confirmation loss and bit stuffing error to trigger the acquisition of positioning signal characteristics and faults. (end)