Printronix t8000 Administrator's Manual page 44

To avoid this problem, increase the Threshold Range value to 60% or 70% of the maximum in the Sensors
> Control > Gap/Mark Thresh menu (the default is 50%), then run a Running Auto Calibrate again, page
41.
Any changes to Threshold Range will not take effect until you run an Auto Calibrate again.
This will raise the Gap/Mark threshold high enough so that the printer will not falsely use the antenna as the
gap (top-of-form).
Media Sensor
Position
1023
0767
0511
Paper Out (441)
Gap (289)
0255
0000
Indicates Type of Gap/Mark
Sensing Selected
44
Detected Amplitude
of the Antenna
Detected Amplitude
of the Gap