User's Manual

Hi-G-Tek Ltd. Microelectronics & Asset Tracking Technology
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5
System
Thw is one of the system's most important parameters. It determines
both: system response time and the seal's battery lifetime..
The meaning in terms of time is: 997 X 3.072 = 3067 msec.
The default value of Thw is 997 decimal where the units are
3.072 msec.
Increasing Thw increases the seal battery's lifetime. On the other hand,
larger Thw values increase the system's response time. This is
illustrated in table 5.4
Example: Calculation of Thw for approximately 2 sec.
2000/3.072=651.042.
We will select 652 as the integer.
The final value of Thw is: 652 x 3.072=2003 msec.
5.2.4 Calculating Tw.
The difference between Thw and Tw should be a minimum of 135
msec, where Thw > Tw. A greater difference will shorten the seal
battery's lifetime
As Tw gets smaller the battery consumption gets higher.
A Tw unit is 0.997 msec.
The default value of Tw is 3000 decimal.
The meaning in terms of time is: 3000 X 0.997 = 2929 msec.
The difference between Thw and Tw for the default values is:
3067 - 2929 = 138 msec.
As can be seen, it is higher than the minimum 135 msec required.
5.2.3. Calculating Thw.