Disk Standard Parameters - LeCroy WaveMaster 8600A Operator's Manual

Disk Standard Parameters

These parameters enable standard disk drive waveform parameter measurements. These
parameters are accessible by touching Measure in the menu bar, then touching the My Measure
button, and then a parameter button: P1 to P8.
DISK STANDARD PARAMETER
aasym
p@lv
nbph
nbpw
owrt
pw50
pw50+
pw50
res
taa
taa+
taa
All disk standard parameters except nbph, nbpw, owrt and p@lv make their measurements on
waveform peak-trough pairs. In addition, several of the parameters determine the baseline of
peak-trough pairs in order to perform their calculations.
Note: The DDAs variable hysteresis setting is essential for identifying peak-trough pairs.
400
DEFINITION
amplitude asymmetry between taa+ and taa-
period of each cycle in an acquired waveform,
called Jitter in the parameter menu
narrow band phase of waveform Discrete Fourier
Transform (DFT)
narrow band power of waveform Discrete Fourier
Transform (DFT)
overwrite
pulse width of peaks at 50% amplitude from
baseline
pulse width of positive peaks at 50% amplitude
from baseline
pulse width of negative peaks at 50% amplitude
from baseline
resolution
track average amplitude
track average amplitude of positive peaks from
baseline
track average amplitude of negative peaks from
baseline
WM-OM-E Rev I