Toshiba B-EX4 Maintenance Manual page 163

5. SYSTEM MODE
It is applicable for only B-SX704-RFID-U2-R/EU-R/US-R/CN-R.
When the Q value is set to 1 or greater, the AGC threshold for data write becomes effective.
When the obtained gain of an RFID tag is lower than the AGC threshold for data write, a data write
operation is not performed. In other words, setting an AGC threshold for data write enables writing
data only to a tag placed just above the antenna.
Supposing that the gain of a tag just above the antenna is 14 and that of a tag off the antenna is 7,
setting the threshold to 11 (a value between 8 and 14) enables the printer to write data only to the tag
just above the antenna.
When the threshold is set to 0, a data write operation is performed regardless of the gain of a tag.
Both of the AGC threshold and the AGC threshold for data write are used to determine whether a tag is
defective or not, but the timing of a gain measurement is different. In the case of the AGC threshold,
this is performed after data is written to a tag.
On the contrary, when the AGC threshold for data write is effective a measurement is performed before
data is written. And if a gain value is lower than the threshold, a data write operation is not performed.
The optimum value differs depending on the tag type.
However, the problem that multiple tags are read at the same time does not occur on the B-EX series
with most RFID tag types. It is not necessary to change the default setting.
Max. Min.
15 0
5.11.4.4 Write AGC threshold / WRITE AGC THRESHOLD
Step Display
1 Decimal
Sign Integer Decimal
digit
Non 2
5-81
5.11 RFID Module Setting
0 fullfil
point
digit
0 Non
EO18-33027
Unit
Non