Microgate WITTI-TAB, User Manual

Page: 13 / 33

Microgate Witty TAB User Manual Page 13 of 33
1.4.1
D
URATION OF THE
T
RANSMISSION
I
MPULSE
(R
ADIO
P
OWER
)
To increase radio transmission reliability, photocell impulse data packages are transmitted
repeatedly over a set time of 1.2 seconds. This ensures that, in case of data loss, redundant
information can be used to rebuild the event with absolute precision.
If more than 1.2 seconds pass between two impulses (e.g. start and stop photocell) there will be
no problems, of course.
Start Stop
2,5 sec (> 1.2)
Trasmission of STA for 1,2s Trasmission of STO for 1,2s
STO Frame STA Frame
Even if the distance is shorter, the second impulse will be detected anyway, as its "tail" will be
longer than that of the previous one.
Start Stop
0,8 sec (< 1.2)
Trasmission of STA for 1,2s
Trasmission of STO for 1,2s
STO Frame
STA Frame