User Manual

Manual MN30-191 Rev - 2
Model 5106 Antenna
The Model 5106 antenna has greatly improved resolution performance over previous GSSI mid-
frequency antennas, such as the Model 3105 (300 MHz). The Model 5106 can be used in continuous,
survey wheel or static stacking modes.
The Model 5106 can only be used with a “deadman” switch with the SIR-20 or SIR-3000 control
units.. These systems are designed to drive the antenna at its maximum rated pulse repetition frequency
of 100 KHz.
System Setup - Standard Settings
Shallow Profiling: Range/Depth is approximately 7m assuming a dielectric constant of 9.
Setup Mode: Manual
System Run Mode: Survey Wheel (recommended) or Continuous
Range:150 ns
Number of Gain Points: 5
Vertical Low Pass Filter: 400 MHz
Vertical High Pass Filter: 30 MHz
Samples per Scan: 512
Bits per Sample: 16
Scans per Second: Set to the maximum scan rate allowed by the SIR System used.
Deep Profiling: Range/Depth is approximately 15m assuming a dielectric
Setup Mode: Manual
System Run Mode: Survey Wheel (recommended) or Continuous
Range:300 ns
Number of Gain Points: 5
Vertical Low Pass Filter: 400 MHz
Vertical High Pass Filter: 30 MHz
Samples per Scan: 1024
Bits per Sample: 16
Scans per Second: Set to the maximum scan rate allowed by the SIR System used.
Signal Position
Place the antenna on the ground and use the Automatic Signal Position selection. The system will servo
and place the direct coupling pulse at the top of the time range window.