User's Manual

Geophysical Survey Systems, Inc. Model 4105 Antenna
System Settings and User’s Notes
MN34-559 Rev C
7
Quick Setup Procedure SIR-20
1. Connect the transducer cable from the SIR-20 (Channel 1) to the Model 4105 antenna.
2.
Connect the power supply to the SIR-20.
3.
Turn on the SIR-20 and wait until it is booted-up.
4.
Double-click on the SIR-20 Desktop shortcut.
5.
Press to recall a saved project for the Model 4105 antenna.
• First time users should locate the folder “Fixed SIR-20 Setups” and select the project
“2.5 GHz Horn Free Run.” Note, this setup applies to both 2.0 and 2.5 GHz horns.
• If the project cannot be found (older RADAN versions don’t have this project) select
the “1GHz Horn Free Run” project from the folder.
6.
Press to run the project.
7.
The position of the signal may be shifted and the data collection settings may be slightly
different than those currently recommended. Change the signal position if necessary so that
it is similar to the signal position shown in Figure 1.
• Compare all of the settings listed in Table 1 to those on the SIR unit and make any
necessary adjustments prior to collecting data.
• Also check the gain of the signal to make sure it is not clipping. Save any changes made
to the signal position and signal gain to a new macro prior to collecting data.
• Prior to collecting any distance-based data, the survey wheel option will need to be
checked (see SIR-20 manual for details).