User's Manual

www.malags.com

2 General

_________________________________________________

2.1 General description of the GPR Technique

In its simplest form the RAMAC/GPR system consists of an

external PC, a Radar Control Unit, a transmitter antenna and a

receiver antenna. The Radar Control Unit is connected to the

transmitter and the receiver antenna with optical fibres and to

the computer with a parallel communication cable.

Figure 2.1 shows a schematic diagram of the system when

connected. Note that this picture refers to the case where the

transmitter and receiver are located in different modules. The

general principle is still the same also for shielded antennas.

Figure 2.1 General description of the principle

In GPR context the following terminology is often used:

Sample:

In a digital system, the incoming signal (to the receiving

antenna) is measured a certain number of times per unit of

time. The result of every such measurement is a numeral, a

sample. A defined number of samples are used to construct a

trace.