2.2 Cables
The only cable needed, is the communication cable between the antenna and the
monitor. See figure 4 below. The cable is a high-quality design with field-rugged
ODU-connectors. It may be ordered in different lengths, at some extra cost.
Figure 4, Left cable for communication between the monitor and HDR-unit. Cable
connected to the HDR-unit and (right) cable connected to the monitor.
If external batteries are to be used, special cables have to be ordered as well as the
dummy-battery.
2.3 Important note on cables and near-by metal objects
The HDR-suit of GPR-systems represents an unprecedented leap in technology.
Each one of the units is a high-tech precision instrument and most of them are
capable of digitizing to more than 16-bits.
This means that the mounting and cabling used with the units become much more
critical than for previous systems. All experienced GPR users knows the importance
of keeping your cables tidily mounted, this is now much more important, because the
sensitivity of these units are much higher.
For this reason all MALA cables have ferrites attached to them as well as
recommended routing. If you experience some ring-down, please first check your
cable mounting, it has been the main cause of internal complaints, previous
acceptable routings are no longer valid.
2.4 Power ON/OFF
The units are powered on by a gentle push on the button mounted on the front of the
connection tower, see figure 5 below. A weak “click” will be heard when the internal
relay switches the power on. The ON-button internal LED will show a steady red light
and the LED-indicators will come alive, see later section.
Power off is managed in two ways; 1) by leaving the data acquisition software in the
monitor, and 2) by holding the on/off switch for approximately 3 seconds and then
releasing it.
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