head
focus_error_thresh
fthresh
Thermal
Specifies the focus error threshold. Focus error measurements larger than this
for a duration set by the ferrdur value indicate that the media is out of focus
and generate a workstation warning message at the end of the plot. Setting
fthresh to 0 disables checking for focus error out of range.
This parameter should never be 0 for any head in the field.
integer