User manual

REI2
User manual
Doc: R2U_2_1079_002_E
Version: 1.07.9
Page
51 of 64
A sufficiently high level of the quality of the radio signal received by the LinkGate system is a
necessary condition for its correct use. When you have completed configuration of the LinkGate
system, we advise you to perform the ‘LinkGate radio signal level test’, present in the various
timing programs on the various stopwatches, to assess its quality.
By distributing the various frequencies available, complex LinkGate systems can be used at
events which take place near each other without causing mutual interference.
3.4. Impulse transmission
An impulse can be transmitted in two ways:
1. with the manual activation key (SIGNAL key)
2. by means of any signal given by the closing of a contact normally open produced by a gate or
photocell., using the BLACK banana jack as a ground and the GREEN banana jack as the
signal.
At the end of data transmission, the LinkGate Encoder will emit a BEEP, which signals that the
device has functioned correctly.
By using a switch (switch n. 1 next to the words SHORT IMPULSE LONG) you can set
transmission duration (approximately 2.3 seconds for long transmission and 0.6 seconds for
short). By selecting long transmission, you will obtain greater redundancy of information as the
same data will be transmitted 16 times. If you select short transmission the set of data will only
be transmitted 4 times so you will have lower redundancy but with a substantial reduction of
transmission time.
For normal use, we advise you always to use long transmission (switch n. 1 OFF) in order to
maximise the redundancy of transmitted data. However, for special applications such as the
taking of several intermediate times very close together, using short transmission is the only
practical solution if transmissions are not to overlap.
Encoder and Decoder: IMPORTANT: when using short impulse transmission, it is advisable
to operate the receiving radio’s “SQUELCH control so that it remains
constantly activated In this way, you will avoid losing impulses as a
result of the delay caused when the transceiver switches over to
reception.
3.5. The repeat function
If for some reason the last event was not received by the Microgate stopwatches you can
retransmit it to them by pressing the REPEAT button even after a considerable interval of time.
If the problem should continue, the event can be re-transmitted as many times as necessary until
satisfactory reception has been obtained.
3.6. Acquiring a speed
With LinkGate Encoder you can receive up to 16 pass-by speeds from as many different
acquisition zones. The basic idea is to calculate the time taken to cover a speed base extremely
accurately and transmit it together with the corresponding impulse (START, LAP or STOP).
Then, by inserting the length of every single speed base into the Microgate stopwatch, you can
obtain the value for the average speed for that stretch.