Model 4105 Horn Antenna System Settings and User Notes The Difference is the Data 13 Klein Drive, P.O. Box 97 North Salem, NH 03073-0097 Phone: (603) 893-1109 / Fax: (603) 889-3984 www.Geophysical.com Sales@Geophysical.com September 2004 Geophysical Survey Systems, Inc.
Geophysical Survey Systems, Inc. Model 4105 Antenna System Settings and User’s Notes LIMITED WARRANTY, LIMITATIONS OF LIABILITY AND RESTRICTIONS Geophysical Survey Systems, Inc. hereinafter referred to as GSSI, warrants that, for a period of 24 months from the delivery date to the original purchaser, this GSSI product will be free from defects in materials and workmanship.
Geophysical Survey Systems, Inc. Model 4105 Antenna System Settings and User’s Notes FCC Notice (for U.S. Customers): This device complies with part 15 of the FCC Rules: Operation is subject to the following conditions: 1. This device many not cause harmful interference, and 2.
Geophysical Survey Systems, Inc. Model 4105 Antenna System Settings and User’s Notes Introduction Thank you for purchasing a Model 4105 High Frequency Air Launched Antenna (Horn). The 4105 Horn represents the state of the art in high-speed, high-resolution pavement thickness and bridge deck analysis ground penetrating equipment. This antenna is designed for applications requiring very high resolution survey from a moving vehicle.
Geophysical Survey Systems, Inc.
Geophysical Survey Systems, Inc. Model 4105 Antenna System Settings and User’s Notes Mounting and Data Collection Recommendations Mounting Specifications: The Model 4105 antenna mounting kit includes 2 square fiberglass tubes, 2 gusset plates and associated hardware. Figure 1 shows a typical 4105 setup on the back of GSSI’s van. Adjustable straps Control cable fastened to rail 18-20” (46-51 cm) 40” (1 meter) Figure 1: Typical Model 4105 setup showing fiberglass rods and gusset plates.
Geophysical Survey Systems, Inc. Model 4105 Antenna System Settings and User’s Notes Data Collection Recommendations: The following software settings are recommended for general Model 4105 data collection. See the SIR-10B/H or SIR-20 manual for instructions on how to make setting modifications. Table 1. Recommended data collection settings for Model 4105 antenna.
Geophysical Survey Systems, Inc. Model 4105 Antenna System Settings and User’s Notes Position: Signal position should be adjusted so that the latest arriving wavelet of the directcoupling is near the top of the scan. This wavelet should always be visible in the data. GSSI’s RADAN post-processing software requires the presence of this wavelet in the data. Figure 2 shows a typical scan of data with the signal properly positioned. The largest amplitude reflection will be the pavement surface.
Geophysical Survey Systems, Inc. Model 4105 Antenna System Settings and User’s Notes Gain: Data collection gain for the 4105 antenna should be adjusted so that the peak amplitude of the pavement surface reflection is approximately 2/3 of the total screen width. For example, in Figure 2 the pavement surface reflection has an amplitude of approximately 20000 and the full screen width is 32000.
Geophysical Survey Systems, Inc. Model 4105 Antenna System Settings and User’s Notes 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.
