User Manual

Geophysical Survey Systems, Inc. Model 5106 Antenna

System Settings and User Notes

Manual MN30-191 Rev - 1

Model 3101D Antenna

The Model 3101D antenna is a high frequency antenna that is designed for applications requiring very

fine resolution and shallow depth penetration. The Model 3101D can be used in continuous, survey

wheel or static stacking modes.

The Model 3101D 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. These limitations are imposed by the Federal Communications Commission (FCC)

System Setup - Standard Settings

Preset Settings: Range/Depth is approximately 1 m (3 ft) assuming a dielectric constant of 5.

Setup Mode: Manual

System Run Mode: Survey Wheel (recommended) or Continuous

Range: 15 ns

Number of Gain Points: 2

Vertical Low Pass Filter: 2500 MHz

Vertical High Pass Filter: 225 MHz

Samples per Scan: 512

Bits per Sample: 16

Scans per Second: Set to 64 (recommended).

Deeper Profiling: For approximately 2 m (6 ft) with a dielectric of 5,

manually set range to 30 ns.