User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 72
12.4.3.8.2 Reading distance
Each card needs a specific amount of power. The reader always provides the same
power level. Therefore, the reading distance will decrease if more tags are present.
Basically, the reading distance depends on the tag, the antenna and the tuning of the
antenna.
12.4.3.8.3 Multi-tag select
Using the serial number with <CR> as parameter, the corresponding tag will be
selected. High-level interactions can be performed addressing only this card. All
other tags remain silent.
12.4.3.8.4 Multi-tag reset
The antenna field reset can be deactivated with the Protocol configuration 2 register.
By suppressing the antenna field reset, it is possible to detect only new tags in the
antenna field.
12.4.3.8.5 Maximum number of tags
The maximum number of tags in the antenna field is limited to 64 and by the physical
characteristics of the antenna.