Printronix SLPA8000 User Manual page 118

Chapter 3
CALIBRATE CTRL Menu
Threshold Range
This option allows the user to select the optimal threshold range for the label
stock in use. The printer defaults to using a threshold range of 50% of the
positive going pulse (see Media Profile) that represents each gap, notch or
mark detected after doing an Auto or Manual Calibrate. The printer then
detects anything within the label with that threshold range as TOF. While this
range is ideal for most medias, some labels with a preprinted image, liner gap
or inlay can confuse the media sensor(s) causing a false TOF detection. In
most cases this can be resolved by selecting a higher threshold range so the
printer will only trigger on the true TOF (gap, notch or mark) position.
NOTE: A new threshold range will not take affect until an Auto or Manual
The range is: 10% to 90% in 10% increments
The factory default is 50%.
NOTE: RF labels require a setting of 70%.
Dynamic Sensing
Disable (the default). Uses a fixed media sensor threshold.
Enable. Continuously adjusts the media sensor's threshold to compensate for
changing environmental factors such as temperature, label/liner contrast,
ribbon darkness, etc.
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Calibrate is successfully performed. A Media Profile should be run
after a Calibrate to visually verify that the new range is the best
possible selection.