User's Manual

User manual
November 24, 2004 1
User manual
Introduction
The LAUR (Line acquisition radio
unit) is used as an element of an LRU
relay cell. It can be inserted anywhere
in a seismic line to collect the data
from FDUs on either side of it, and
relay the data to the associated LRU.
Built in the LAUR is a full
performance LAUL, optimizing the
deployment of field hardware.
Operating in a relatively low radio frequency band (215 MHz to
250 MHz), it can be used in difficult areas. The user can choose
between various configurations, depending on the required data rate and
on the expected transmission range.
Using a handheld terminal as a Field Deployment Aid, the radio link can
be set up adequately prior to connecting the LAUR to the seismic
network. The parameter settings can also be changed through the HCI
workstation.
NOTE: The available frequency band depends on the regional settings
chosen by the user when installing software on the HCI workstation and
on the handheld terminal. For compliance with Canadian and US
communications regulations, the frequency band is limited to
respectively:
• Canada: 217 to 218 MHz and 219 to 220 MHz.
• USA: 216 to 217 MHz and 218 to 219 MHz.
Figure 1 LAUR