User's Manual

Hi-G-Tek Ltd. Microelectronics & Asset Tracking Technology
54
5
System
Table 5.3. below shows some examples of the Verify command using
different retransmissions and Reader Sessions. In this example,
Thw=3 sec; Ts=21 msec; Taw=105 msec.
Table 5.3.
Reducing the Reader Interrogation Header - Thw increases the
speed of the Verify session. Increasing the speed of the process is
in conflict with the battery lifetime of the seal. (Higher speed = lower
battery lifetime). When designing an application, careful attention
should be paid to optimizing the correct tradeoffs between system
response time, battery lifetime and number of seals.
Taw is calculated for 5 slots of Ts.
Table 5.4 demonstrates the impact of Thw on response time and
battery life. The scenario for the results in the table is a GATE
concept, whereby a seal is exposed to a reader for 6 minutes per
24 hours and: Ts=21 msec; Taw=105 msec.