Sensors & Software pulseEKKO Product Manual page 140

System Configuration
6.2.4 Antenna Separation
Reflection Survey
When moving transmitting and receiving antennas along a reflection survey line, it is important
to maintain a fixed separation between them. Antennas mounted on a cart, tow frame or one-
person handle have a fixed antenna separation. When antennas are not fixed, use a rope or
measuring tape to maintain the fixed antenna separation (see Section 11).
Press Antenna Separation to display a screen shown in Figure 6-23:
Figure 6-23: Setting Antenna Separation
Press the + and – buttons under Antenna Separation to set the desired separation values. It
will cycle through common pre-set values. Press Custom Value to enter a specific antenna
separation value.
In general, the recommended antenna separation should equal the antenna length. For
example, for 100 MHz antennas (which are one meter long), the separation should be set one
meter apart. If the antenna separation is too small, receiver electronics may be overloaded by
the transmission signal resulting in data clipping, depending on what type of transmitter is used.
For convenience and practicality, it is permissible to use a separation of 0.5 m for the 100 MHz
antennas when a pulseEKKO PRO transmitter is used.
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