Measurement system and data transmission interface

Abstract

The invention discloses a measurement system and a data transmission interface. The measurement system comprises a signal generator, a signal receiver and a data transmission interface. The signal generator transmits input data to the data transmission interface. The signal receiver receives output data from the data transmission interface. The signal receiver measures the anti-jitter capability of the data transmission interface according to the error return data in the output data. The data transmission interface comprises a receiving circuit, a synchronizing circuit and a transmitting circuit. The receiving circuit is used for receiving input data and generating an error code signal when a data error occurs. The synchronization circuit receives the error code signal to generate an errorcode indication signal. The transmitting circuit is used for transmitting the output data to the signal receiver, receiving the error code indication signal when a data error occurs, and generating error return data in the output data according to the error code indication signal. According to the embodiment, the cost of a measurement system can be reduced, and the anti-jitter capability of the data transmission interface can be effectively measured when the clock pulse is asynchronous or the output data is high-frequency.

Description

technical field [0001] The present disclosure relates to a measurement system and a data transmission interface, and in particular to a measurement system and a data transmission interface with anti-jitter capability. Background technique [0002] In the Data Transmission Interface, Jitter refers to the deviation of the expected value of a periodic signal over time. Since some jitter is unavoidable, there is a need for modern data transmission interfaces to exhibit some jitter tolerance and still meet performance requirements. In fact, many industry standards require the data transmission interface to have the lowest jitter tolerance (Jitter Tolerance) measured according to different indicators. Therefore, manufacturers, researchers, engineers, and end users pay great attention to the jitter immunity of data transmission interfaces or chips and how to measure them. Traditionally, there has been a measurement method for the anti-jitter capability of the data transmission in...

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Problems solved by technology

[0003]However, most of the traditional lower-level measurement equipment cannot measure the anti-jitter capability of the data transmission interface when operating across the time domain (clockdomain crossing), especially Anti-jitter capability at high frequency operation

In addition, although high-end measurement equipment can measure the anti-jitter capability of the data transmission interface when operating across time domains (clock domain crossing), its price is relatively expensive, which cannot be afforded by general measurement units

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