Minelab's Full Band Spectrum (FBS) technology simultaneously transmits 28 different frequencies ranging from 1.5 kHz to 100 kHz. This wide frequency range gives Minelab metal detectors using FBS a significant advantage in target identification and depth detection compared to single-frequency machines.
How FBS Technology Works
Unlike traditional metal detectors that operate on one or two frequencies, FBS technology transmits all 28 frequencies simultaneously in a broad spectrum. The detector's processor analyzes the response from each frequency to create a detailed "signature" for every target.
Different metals respond better to different frequencies. High frequencies excel at detecting small, shallow targets like jewelry, while low frequencies penetrate deeper for larger objects like coins and relics. By using the full frequency band, FBS detectors get optimal performance across all target types and depths.
FBS vs. Single Frequency Detection
Single frequency detectors force you to choose between depth or sensitivity. A 5 kHz frequency might find deep coins but miss small gold. A 20 kHz frequency excels on jewelry but lacks depth penetration.
FBS eliminates this compromise. You're essentially running 28 different detectors at once, each optimized for different targets and conditions. The result is more accurate target identification and fewer trash targets dug.
Target ID Accuracy
FBS technology creates a multi-dimensional target signature instead of relying on a single frequency response. This makes it much harder for iron trash to fool the detector into displaying as a good target.
Which Detectors Use FBS Technology
Minelab's FBS technology appears in two main detector models:
- E-TRAC - The flagship FBS detector with GPS integration and advanced discrimination patterns
- Safari - A more affordable FBS option with simplified controls
Both detectors share the same FBS detection engine but differ in features and user interface complexity. The Minelab detector lineup has since evolved to include newer multi-frequency technologies like Multi-IQ, but FBS remains highly effective for serious treasure hunters.
FBS Performance in Different Conditions
Mineralized Soil
FBS excels in challenging ground conditions. The multiple frequencies allow the detector to automatically adjust for ground mineralization without losing sensitivity. You'll find this particularly useful when hunting old homesteads where soil conditions vary across the property.
Trashy Sites
The superior target separation of FBS makes it ideal for iron-contaminated sites. The technology can often identify good targets masked by nearby trash - scenarios where single-frequency detectors would give mixed signals.
Programming and Customization
FBS detectors offer extensive customization options. You can create discrimination patterns, adjust sensitivity for specific frequencies, and save custom search programs for different hunting scenarios.
The learning curve is steeper than basic beginner detectors, but the payoff in target recovery makes it worthwhile for serious hobbyists.
FBS Technology Limitations
FBS detectors are complex machines that require more setup time than turn-on-and-go detectors. They're also heavier due to the additional processing power needed to handle 28 frequencies simultaneously.
Battery life is shorter compared to single-frequency machines because of the increased power requirements. Plan on carrying spare batteries for long hunting sessions.
Getting the Most from FBS
Success with FBS technology requires understanding your specific detector's discrimination patterns and audio responses. Spend time learning how different targets sound and display before heading to heavily hunted sites.
Consider upgrading to premium metal detector accessories like quality headphones and coil options to maximize the technology's potential.
FBS represents a significant step forward in metal detection technology. While newer multi-frequency systems have emerged, the proven track record of FBS makes it a solid choice for treasure hunters who want maximum target information from their detector.
