User manual

REI2
User manual
Doc: R2U_2_1079_002_E
Version: 1.07.9
Page
49 of 64
2. LinkGate Encoder: 3 features guaranteeing the reliability of radio
transmission
To overcome unreliability and the various problems associated with the old concept of radio
transmission of impulses, LinkGate Encoder offers a number of reliable and innovative
solutions.
2.1. Digital transmission of impulses
LinkGate Encoder 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
• The Time taken to cover a speed base (if present).
To the set of data are added numerous control codes and error auto-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.
Even with very disturbed signal transmission, this system ensures maximum reliability and
precision (+/- 0.4 thousandths of a second); the complete reception of a single set of data is all
that is required to reconstruct the original time of the event.
2.2. The Repeat function
If there are any problems in data reception, (radio malfunction, interference from a more
powerful transmission, a cable which comes unplugged, etc...) you can use the REPEAT
function. LinkGate Encoder allows you to repeatedly re-transmit impulses which have not been
received, even after a considerable length of time has passed.
As soon as the transmission of an event begins, LinkGate Encoder starts counting the time from
the start. By pressing the REPEAT key, you transfer the correct time to the stopwatch which
takes into account the time which has passed up to that moment.
2.3. Internal memorization of event times
LinkGate Encoder is equipped with a Real Time Clock that allows you to use event times in
event management. This special characteristic enables you to save the times of every event on a
permanent memory, subsequently giving you the possibility through serial link of downloading
its contents onto Microgate’s stopwatches. The device stores the last 256 event times and speeds
and so allows you to retrieve after an interval of time any data lost because of radio malfunction
or any other reason.