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2. SYSTEM MODE EO13-33002
(Revision Date: Jul. 24, 2008)
2.9 RFID Module Setting
2-86
2.9.15 AGC Threshold Lower Limit for Retry Setting
This parameter is to set an AGC threshold lower limit.
When the Q value is set to 1 or greater, the AGC threshold lower limit for retry becomes effective.
Even if a tag’s gain is lower than the AGC threshold for data write, a data write to the tag may be successful
in a retry if the gain is greater than the lower limit. For a retry, the printer lowers the threshold to the highest
gain of the tag if it is greater than the lower limit or to the lower limit if it is greater than the highest gain of
the tag. (For details, refer to Section 8 of Option Installation Manual.)
When the same value is set to the AGC threshold for data write and the AGC threshold lower limit for retry,
respectively, the threshold will not be changed for a retry.
The optimum value differs depending on the tag type.
Set the lower limit for retry with the [FEED] or [RESTART] key, if necessary.
When “WT MIN AGC” is displayed, press the [PAUSE] key.
Use the [FEED] or [RESTART] key to select a desired option. (Range: 0 to 15)
After selecting the adjustment value, press the [PAUSE] key. The display returns to “<10>RFID”.
Note:
Example 1
AGC threshold for data write: 11
Lower limit for retry: 9
Detected tag’s gain: 10
As the gain of the tag is lower than the threshold, a data write operation is not performed for this tag at the first
try. However, the gain is greater than the lower limit.
Then the printer retires to write data to this tag according to a new AGC threshold of 10.
In this case, a retry of a data write will mostly succeed because the detected tag’s gain is greater than the new
threshold. (However, the success rate is not 100% because a gain of a tag is not always the same.)
Example 2
AGC threshold for data write: 11
Lower limit for retry: 9
Detected tag’s gain: 8
As the gain of the tag is lower than the threshold, a data write operation is not performed for this tag at the first
try. Also, the gain is lower than the lower limit.
Then the printer retries to write data to this tag according to a new AGC threshold of 9.
In this case, a retry of data write will mostly fail because the detected tag’s gain is lower than the new threshold.
(However, the error rate is not 100% because a gain of a tag is not always the same.)
<10>RFID
WT MIN AGC 11
[RESTART]
[FEED]
WT MIN AGC 15
WT MIN AGC 14
WT MIN AGC 1
WT MIN AGC 0