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6.7.1 Outline of the RFID Calibration
RFID calibration is a function to automatically determine the distance to the optimum write/read position
and the AGC value required for properly writing/reading data on/from RFID tags.
When the result of an RFID calibration is saved (by pressing the [ENTER] key) while the detected values are
shown on the screen, the value obtained through the RFID calibration is set for the CALIB. AGC and CALIB.
POSITION parameters in the system mode. In addition, the following parameters are automatically set.
CALIB. MODE: ON
POWER LEVEL: 4
Q VALUE: 4
Notes:
1. Note that the optimum write/read positions and AGC value obtained through RFID calibration do not
guarantee a perfect write/read, so they should be used as a guide.
2. Prior to an RFID calibration, be sure to perform an automatic calibration (User system mode
→ <2>SET
PARAMETERS
→ CALIBRATE) to place the media at the print start position. In other words, an automatic
calibration must be performed each time before performing RFID calibration.
3. If an RFID calibration is performed without placing the media at the print start position, an improper value
may be set, which may cause an error message,
“RFID WRITE ERROR”, to be shown during
writing/reading data or data to be written on/read with a wrong tag.
4. Be sure to select a usable antenna position in the system mode before performing an RFID calibration.
Failure to do this may cause an improper value to be set, which may cause an error message,
“RFID
WRITE ERROR
”, to be shown during writing/reading data or data to be written on/read with a wrong tag.
Antenna position set
in the system mode
Actual RF antenna position
Application
Rotation of RF
antenna
Wave director
position
FRONT
0°
FRONT
Usable
CENTER
Unusable
REAR
Unusable
5. While an RFID calibration is performed, EPC data is written on a tag.
The data to be written is 5555AAAA5555AAAA5555AAAA (12 bytes).
If this data has already been written on a tag, proper operation of RFID calibration is not guaranteed.
Therefore, once a tag undergoes an RFID calibration, this tag cannot be used for RFID calibration again.
