Toshiba B-EX Series Key Operation Specification page 155

Max. Min. value
value
15 0
8.12.4.5 WRITE RETRY MIN AGC
This is effective only for B-EX700-RFID-U2-EU/US-R, B-EX700-RFID-U4-R,
B-EX700-RFID-U4-EU/US-R, U4 module preinstall model (B-EX4T1/EX4T2-GS18/TS18-CN-R).
When the Q value is set to "1" or greater, the AGC threshold lower limit for retrying becomes effective.
Even if a tag's gain is lower than the AGC threshold for data writing, a data writing 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.
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, no data writing operation is 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 data writing retry 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, no data writing operation is 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 data writing retry 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.)
When the same value is set to the AGC threshold for data writing and the AGC threshold lower limit for
retrying, respectively, the threshold will not be changed for a retry.
The optimum value differs depending on the tag type.
Actually, the problem of reading multiple tags at the same time does not occur with most RFID tag types.
It is not necessary to change the default setting of "0".
Max. Min. value
value
15 0
Step Display
1 Decimal
Step Display
1 Decimal
150
Sign Integer Decimal
digit
None 2
Sign Integer Decimal
digit
None 2
0-padding
place measure
0 None
0-padding
place measure
0 None
Unit of
None
Unit of
None