MEASURE

LeCroy provides a rich set of drive measurements that are considered the industry standard. Measurements such as TAA asymmetry and local period are provided in the Disk Drive Analyzers. Setup of the most common drive measurement parameters is rapidly accessed through the DDA 260’s special MEASURE front- panel key.

Determine head-signal noise using the DDA 260’s ACSN measurement parameter. Use the continuously-selectable frequency cutoff filter to ensure ACSN is measuring only the noise components your channel will see.

Frequency Domain Parameters

The DDA 260 can calculate narrow band phase (nbph) in degrees relative to the start of the waveform and narrow band power (nbpw) in dBm. These parameters provide a rapid technique to extract the amplitude and phase of single frequencies from complex waveforms. The parameters are more efficient than using an FFT for specific frequencies of interest.
The nbpw frequency domain parameters provide an easy method for measuring non-linear distortion using fifth harmonic elimination.

Parameters that measure amplitude and timing relationships between positive peaks and negative peaks (troughs) of a waveform are also included in the DDM package. Used in conjunction with the parameter histogram display, a statistical description of the waveform can be calculated.