Channel Characterization
The NI Sound and Vibration Measurement Suite offers the means for various
measurements that assess the performance and behavior of the communication or signal pathway
your channel performance is optimized, ensuring your channel performance is
optimized.
Refer to the following sections for more information.
Idle-Channel Noise Idle-channel noise is noise present in a communications channel when no signals are applied.Gain A gain measurement measures the amplification between the amplitude of the identified tone in the input signal and the reference amplitude.Calculating Dual-Channel Gain and Phase Gain and phase measure the amplification and the phase lag between the stimulus channel and the response channel at the test frequency. This lag time must be accounted for.Dual-Channel Crosstalk A crosstalk measurement analyzes the amplification and phase lag between the reference channel and the idle response channel at the test frequency.Spurious Free Dynamic Range A spurious free dynamic range (SFDR) measurement quantifies the lowest level peaks identifiable as actual components of the signal instead of device under test artifacts.Dynamic Range A dynamic range measurement quantifies the distortion and noise found in the device under test (DUT) output when a low-level signal is provided.Group Delay Group delay is often used as a criterion to evaluate the phase nonlinearity of a filter.Phase Linearity Phase linearity is one way to measure the amount of group delay distortion that a device under test (DUT) introduces.