User Manual

4
How to connect
a) The detection loop: Connect the supplied 75 Ohmdouble-shielded coax •
cable to the MYLAPS X2 decoder.
b)The auxiliary port: This port can be used to connect a photocell, external •
start pulse or a sync pulse. For more information on how to connect these
devices, see appendix D.
c) The GPS antenna: Connect the GPS antenna cable and place the antenna •
where it has a clear view of the sky overhead to be able to make
connections to satellites
d) The network: This port can be used to connect the network cable •
between the decoder and the network connection port of the computer.
e) Power: Connect the supplied VDC adapter to the decoder and mains. •
It is recommended to connect the VDC adapter to mains through an
Uninterruptable Power Supply (UPS) to avoid any interruption of power
supply to the decoder.
1.2 Operating the MYLAPS X2 decoder
The decoder is not equipped with an on/off switch, therefore connecting the
decoder to the mains will switch it on. This will enable timing of transponder
passings after approximately 15 seconds. With each detection of a transponder
the received transponder information is shown on the decoder display.
1.2.1 Noise level
The decoder determines the average background noise. Noise level should not
exceed -85 dBm. If the noise level is higher, the received transponder signal
strength should be at least 20 dBm above noise level to ensure proper functioning
of the system. So if the transponder received signal strength is -55 dBm, the
noise should not exceed -75 dBm.
1.2.2 Signal strength
Transponder signal strength should preferably be above -65 dBm and should at
least be 20 dBm higher than the indicated background noise. The closer the
transponder is to the track, the higher the received signal strength will be. A
higher transponder signal strength should allow for greater immunity against
outside interference.
1.3 Menu options explained
On the front of the decoder, you will nd an information display designed to
view and change the decoder settings. The status screen will show the following
information: