2022 is set to 19,200 baud with 12 bits per character Tt = .0125. Hence:
Td = 16 * (.050 + .0125) + (16 - 16) * .030
= 16 * (.0625) + 0 * .030
= 1.00 + 0
= 1.00 second, same as above
If there are only 2 Tags and 16 Readers, #P becomes 2 and the equation works out:
Td = 2 * (.050 + .0125) + (16 - 2) * .030
= 2 * (.0625) + 14 * .030
= .125 + .42
= .545 seconds
These Tags could travel at: Rate = 0.7 ft / .545 sec, or 1.28 feet per second.
If eight Readers were eliminated from the Model 2022's polling loop via the Assign Command #S
becomes 8 and the equation works out:
Td = 2 * (.050 + .0125) + (8 - 2) * .030
= 2 * (.0625) + 6 * .030
= .125 + .18
= .305 seconds
And could travel at Rate = 0.7 ft / .305 sec, 2.29 feet per second.
3.3.2 TIMING SUMMARY
This section summarizes the timing equations and parameters for both Interface models:
Model Model
Parameter Definition 2022 2022/8
#P # of reportable Tags 1-16 1-16
#S # of Readers addressed 1-16 1-16
Tr Time to read/process Tag l50 msec 28 msec
Tn Time to test Reader w/o Tag 30 msec 20 msec
L Number of characters per report 20 12
B Baud rate, bits/sec 110-19200 110-19200
N Number of bits/character 9-12 9-12
EQUATIONS
Tt = time to transmit a Tag report
= (L * N ) / B
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