User Manual
8
2.3 Testing the detection loop installation
Once the loop has been installed, it should be tested to ensure
that it is functioning correctly. We also recommend repeating
the same procedure at the start of each race event. You can
determine if your loop is functioning correctly by doing the
following tests:
a) Connect the detection loop to the host and
computer running AMB i.t. timing software (also see
the seperate TnetX Pro Host manual).
Check the background noise, which is updated every
vesecondsintheAMBi.t.timingsoftware.The
background noise level should be between 0 and 40
points. A higher value may indicate interference
by other electrical equipment in the area or a bad
loop installation.
Try switching off any suspected equipment or
removing nearby objects and check for improvements.
Especially at night, short-wave radio transmitters may
cause an increased background noise.
b) If a detection loop has been correctly installed, a
communicator should be picked up at the same
distance along the entire detection loop. To test this,
stand at one end of the detection loop about 8 m (25
ft) away and hold a communicator approximately 120
cm (4 ft) off the ground. Walk slowly towards
the detection loop. The ‘loop’ sign at the display will
lledinwhenthecommunicatorisdetected.Mark
the spot where the communicator was detected.
Repeat the process for the middle and other end of
the detection loop and do the same coming from the
other direction. The detection distance from the loop
should be approximately the same for all positions (<
20% variation).