Model 4108F Horn Antenna System Settings and User Notes We Provide Complete Survey Solutions 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 February 2002 Geophysical Survey Systems, Inc.
Geophysical Survey Systems, Inc.
Geophysical Survey Systems, Inc. Model 4108F 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 12 months from the delivery date to the original purchaser, GSSI's products will be free from defects in materials and workmanship.
Geophysical Survey Systems, Inc. Model 4108F Antenna System Settings and User’s Notes FCC NOTICES: 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.
Geophysical Survey Systems, Inc. Model 4108F Antenna System Settings and User’s Notes Mounting and Data Collection Recommendations Mounting Specifications: The Model 4108F antenna mounting hardware includes 2 square fiberglass tubes and 2 gusset plates. Figure 1 shows a typical 4108 setup on the back of GSSI’s van. Adjustable straps Transducer cable fastened to rail 18-20” (46-51 cm) 40” (1 meter) Figure 1: Typical Model 4108F setup showing fiberglass rods and gusset plates.
Geophysical Survey Systems, Inc. Model 4108F Antenna System Settings and User’s Notes Data Collection Recommendations: The following software settings are recommended for general Model 4108F data collection. See the SIR-20 manual for instructions on how to make setting modifications. Table 1. Recommended data collection settings for Model 4108 antenna.
Geophysical Survey Systems, Inc. Model 4108F Antenna System Settings and User’s Notes Gain: Data collection gain for the 4108F 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. Using the filter settings described in Table 1, a gain of 13-14 dB is typical for most pavement surfaces.
Geophysical Survey Systems, Inc. Model 4108F 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 4108F antenna. 2. Connect the power supply to the SIR-20. 3. Connect the Model 10F marker cable to the marker connector on the SIR-20, shown in Figure 4. The SIR-20 will not operate with a horn antenna without this cable attached. Attachment location of Model 10F marker/transmit switch Figure 3.
Geophysical Survey Systems, Inc. Model 4108F Antenna System Settings and User’s Notes The red transmit trigger on the Model 10F cable must be pressed at all times during project setup and data collection Figure 4. The red trigger on the Model 10F ha ndle must be pressed at all times during project setup and data collection using a horn antenna. 8. The position of the signal may be shifted and the data collection settings may be slightly different than those currently recommended.
