POLIFEMO-RADIO
User manual
Doc: POL_R_200_006_E
Version: 2.0
Page
5 of 11
4. OPERATING MODES
The Polifemo-Radio photocell works by reflection: the maximum operating distance between the
photocell and the reflector is 30 metres.
Fig. 3
Max 30 m
4.1. CENTERING
Centering takes place in the following way: when switched on, the photocell emits a continuous
BEEP, pointing the photocell on the reflector, the BEEP stops, thus indicating correct centering.
5. RADIO TRANSMISSION
The LinkGate-SF system incorporates special technological features to ensure maximum reliability
in the transmission of acquired impulses.
5.1. DIGITAL TRASMISSION OF IMPULSES
EncRadio-SF transmits a set of data (no longer a single impulse!) that contains a large quantity of
information. In particular, the following are transmitted:
• The transmitter’s code (which can be selected with the Channel Select switches)
• The type of signal transmitted (Start, Lap number or Stop, which can be selected with the Signal
Type switch)
• How long ago the event took place.
To the set of data are added numerous control codes and error self-correction codes which prevent a
signal from being incorrectly interpreted during reception.
All the data (information + control codes) are transmitted 16 times, in order to reduce the possibility
of reception failure.
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