| 摘要 |
A test and measurement instrument and method for generating IQ-based time domain waveform information and presenting the IQ-based time domain waveform information together with other time domain waveform on a common axis through a user interface. The instrument includes one or more input terminals (110) to receive an electrical signal under test, an analog-to-digital converter (ADC,108) to digitize the signal under test, a digital downconverter (115) to produce I (in-phase) and Q (quadrature) baseband component information from the digitized signal, a memory (130) configured to store the IQ baseband component information, a user interface (150), and a controller (140). The controller comprises means (145) for generating an IQ-based time domain waveform using the IQ baseband component information, and present the IQ-based time domain waveform and a second time domain waveform on a common axis through the user interface. |
