User's Manual

Geophysical Survey Systems, Inc. Model 4105 Antenna
System Settings and User’s Notes
MN34-559 Rev C
4
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.
SIR-10B/H SIR-20
Transmit Rate Fast 100-500 KHz
†
Samples/Scan 512 512
Scans/Sec:
160 100 – 500*
†
Time Range 10 ns 10 ns
Bits/Sample 16 16
Vertical Filter Settings:
IIR High Pass 100 MHz (1 Pole) 0-1 MHz **
FIR High Pass 250 MHz (Boxcar) 250 MHz
FIR Low Pass 4000 MHz (Boxcar) 5000 MHz
* Use higher scans/sec rate when collecting data at higher scans/m.
** Use 1 MHz IIR High Pass to remove signal slopes near bottom of scan (as shown in
Figure 2).
†
– FCC regulations require that SIR-20 systems sold in the U.S. are limited to a transmit rate
of 100 KHz.