User's Manual

IDS Ingegneria Dei Sistemi S.p.A. Protocol: MN/2009/030 - Rev. 1.2
Safe Rail System Data Acquisition Software
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in the pavement, etc. In these cases, it can be very time
consuming to calculate the distances each time as described
above and is more convenient to select the With 1st
Marker 1 box after having just set the initial L or T co-
ordinate.
The system automatically recognises the path performed in
the negative portion and automatically associates the
negative starting co-ordinate to the last L or T co-ordinate.
For example, for the case of the Transversal scans shown in
Fig. 4-30, first we select the scan type (in this case
Transversal) in the “ Scan Settings ” window (Fig. 4-28).
Then we set the current value of the T co-ordinate (2m in
this case) in the “ Coordinate (m) ” field; finally, we activate
the “ With 1
st
Marker” option in the “ Scan Offset (m) ” field.
In this way, the acquisition starts in the negative L portion,
and when the centerpoint of the antenna trolley passes
across the zero line, the M arker 1 button has to be pressed.
The trolley is then pushed to the end of the scan. When the
stop acquisition button is pressed, the system automatically
associates a negative co-ordinate to the initial portion of the
file of the scan that has been performed
 “ On L/T coordinate ” selection
In this case, you have to manually measure the value of the
co-ordinate corresponding to the centerpoint of the antenna
array with respect to the reference system selected
previously, and insert it into the active field.
For example, if you have to perform a transversal scan
starting from the co-ordinate T=2 and L=2, you must set the
type of scan to Transversal and then set the actual value of
the T co-ordinate (e.g. 2 m) in the “ Coordinate (m) ” field.
Next, activate the “ L coordinate ” in the “ Scan Offset (m) ”
area, setting it to 2 in this case. The scan can now be
performed.
!
BE CA REFUL
In “ With 1
st
marker 1 step
” mode, the antenna system must be moved at
least 20 cm after having pressed the Pos. Marker button shown in Fig. 4-29
before pressing the stop button; otherwise the section cannot be viewed by
the elaboration SW.