User's Manual

Hi-G-Tek Ltd. Microelectronics & Asset Tracking Technology
67
5
System
Thw - Tw = 2003 - (1873 X 0.997)=135.6 msec>135 msec!
Readers Interlace Window is the window that other Readers can use
in order to transmit a message during interlace mode of operation.
By using this mode, all the Readers share a common set of Random
Access and Alert windows. This mode is useful if system analysis
shows that system response time will be improved.
Since the Readers share the same response windows, the Reader
Interrogation Header and the Thw of each Reader must be identical,
as should be the Thw of each Reader.
For k Readers, the Tiw will be:
5.2.5 Calculating Thp.
Calculating Thp is identical to calculating Thw. To calculate Thp
refer to the appropriate Tp.
Tiwj=TiwX(k-j) where j=1,,,k
Example:
Calculate the appropriate Tw for a Thw=2003 msec.
1. Calculation of the approximate value for Tw: 2003 135=1868 msec
2. Calculation of the decimal value for Tw: 1868/0.997=1873.62
3. Find the integer value for Tw: The integer value is 1873, lower
than 1873.62 calculated in step 2, but not too small.
4. Verify the calculations.