![]() Setting an oscilloscope in differential mode and using both inputs (TX+ and TX-) will produce an output whose amplitude is twice the value of the single-ended amplitude and centered at 0V. Using this method, signal distortion and noise are minimized. This is the industry standard method of quantifying a differential signal pair’s amplitude. In terms of a transceiver, these signals are TX+ and TX. Differential SignalsĪ differential signal represents the difference between two signals. All of our test data is taken from a single-ended measurement on an oscilloscope. Since most oscilloscopes have an internal ground reference, this is what is measured when connecting an oscilloscope to one output terminal, TX+ or TX. This is shown in the figure below.īoth inputs are the exact same amplitude, just inverted to each other. The amplitude of one side (TX+) is equal to the amplitude of the inverted side (TX-). ![]() This is the signal that would be physically measured on an oscilloscope from one side of the electrical output of a transceiver (TX+ or TX-). In terms of a transceiver being referred to its electrical side, this signal is either TX+ or TX. Single-Ended SignalsĪ Single-Ended signal is a signal that is carried on only one conductor. This note will explain each type of signal, the difference between the two signals, and how to interpret them on a datasheet. ![]() ![]() The difference between differential and single-ended output voltage swing is vital to understand when interpreting data. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
January 2023
Categories |