11
System components
Antennas and antenna box
Antennas
The MIRA HDR system is designed to handle shielded separable antennas only, no other
antennas can be used with the MIRA HDR system. The MALÅ HDR antennas are designed and
built to very tight tolerances to achieve a ‘near-identical’ response (signature) from each
channel.
The MALÅ HDR shielded antennas are available with a centre frequency of 500MHz. This
frequency will cover investigations ranging from 0m to approximately 3m depth in non-
conductive ground.
Tx
Rx
Each antenna element is 128 x 222 mm in size. The Tx is contained in one box, while the Rx
consists of two connected boxes. In the Rx antenna the antenna elements are placed 130 mm
apart giving a channel separation of 6.5 cm.
The Tx has one connector providing both power and trig signal. The Rx has two connectors.
One provides power and communication, the other provides the trig signal. The status of the Rx
antennas can be seen when connected to the laptop with MIRAsoft HDR installed.
Blockmaster
The blockmaster contains the electronics for generating the trig signals and their timing. It is
situated above the antennas and can be raised for disconnecting and reconnecting the units:
To access the connectors on the blockmaster:
•
Remove the two screws on each side of the blockmaster (marked with circles in the
picture below)
•
If needed, loosen but do not remove the remaining two screws (marked with squares in
the picture below)
•
Lift up the blockmaster
•
Tighten the screws (marked with square), if needed, to hold the blockmaster in place.
•
Connect or disconnect antennas
•
Lower the blockmaster
•
Insert and tighten the two screws on each side of the blockmaster (marked with circles)
•
Tighten the remaining screws (marked with squares)
Summary of Contents for MALA MIRA HDR
Page 1: ...MAL MIRA HDR User Guide...
