pulseEKKO PRO
3-System Setup Parameters
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3.3.1.1
Triggers
Triggering the system with an electrical, Fibre Optic or DVL B Button trigger (options 1 -3) is best for
surveying in difficult terrain where antennas cannot be moved easily or at regular time intervals. For the
position of each measurement point, the system assumes the operator has moved the antennas one step
size along the survey line. This is also the mode to select when an odometer is used to trigger the system
at specific distance intervals.
In Trigger mode, the user presses the B button on the DVL screen or an external trigger button to collect
the next trace. The user is prompted with “READY” or "HIT TRIGGER" on the DVL screen to indicate the
system is ready to collect the next trace.
Note that when data are collected with the electrical or the fibre optic trigger, the device may emit a
beeping sound after the button is pressed, indicating data collection is taking place. The beeping sound will
only occur if the corresponding Beeper Activated option is selected (Section 3.3.2: P43).
3.3.1.2
Odometer
Selecting this option means that the system will be triggered to collect data using the input from the
odometer (Section 2.5.4: P23). See Section 6.6 Odometer Data Acquisition on page 88 for more details
about data acquisition with an odometer.
3.3.1.3
Free Run
Selecting this option means that the system is not triggered by a particular device but runs continuously in
time.
The system automatically collects data at regular, user-determined time intervals. This is called “Free
Run” mode and is best for surveys in flat, unobstructed terrain where antennas can be moved easily. For
the position of each measurement point, the system assumes the operator has moved the antennas one
step size along the survey line. True position can also be controlled by the user adding markers at known
positions along the survey line and Rubberbanding the data in post-processing.
When Free Run operation is used, it is necessary to slow the data collection down by increasing the
number of stacks (Section 3.2.7: P40) and the time delay between data traces (Section 3.3.3: P44). These
options allow the user to control the speed of the data acquisition.
The number of stacks and time delay should be set to values that, when combined with speed the system
is moving at, provide an appropriate Step Size interval. This may take a little experimenting to determine
the optimal values for stacks, time delay and the actual speed that the system is moving.
3.3.2 Beeper Activated
The Electrical and Fibre Optic Beeper/Trigger units are designed to emit a beeping sound as a trace of
GPR data is being collected. However, they will only beep if they have been activated to do so with this
menu.
The available settings in this menu are: CANBUS, Fibre Optic, Both or None.
Selecting None means that even if a Beeper/Trigger is present and is the Trigger Method being used
(Section 3.3.1: P42), it will not beep.
