Safeguard Your GNSS Timing Against Spoofing Attacks

GNSS spoofing is a growing threat to any system that depends on precise timing and positioning. From telecom networks and data centers to financial trading platforms and defense infrastructure, even brief disruptions can lead to data loss, compliance failures, and costly downtime.

GP-Blocker is purpose-built to defend GNSS-dependent time servers against spoofing attacks. By automatically isolating the GNSS antenna and switching systems into secure Holdover mode, GP-Blocker preserves the accuracy of your PPS signal—even during sophisticated interference attempts.

Why GNSS Spoofing Protection Matters

GNSS receivers are highly sensitive by design. While this enables precise positioning and timing, it also makes them vulnerable to malicious spoofing signals. Military-grade spoofing or nearby SDR devices can overpower legitimate satellite signals, leading to:

• Timing drift and synchronization errors

• Network outages and service degradation

• Compliance risks for regulated industries

• Security vulnerabilities in critical infrastructure

GP-Blocker provides a robust layer of defense that prevents spoofed signals from reaching your time server.

How GP-Blocker Protects Your Systems

When spoofing is detected, GP-Blocker:

✔ Disconnects the GNSS antenna from the time server ✔ Activates a high-isolation RF switch ✔ Engages an embedded GNSS jammer

✔ Forces the receiver into Holdover mode ✔ Maintains high PPS timing accuracy

This ensures your infrastructure continues operating reliably—even under active spoofing conditions.

Industry-Leading RF Isolation for Maximum Protection

Standard GNSS antennas can output signals up to 5 dBm, while receiver sensitivity can reach –145 dBm. Blocking spoofing attempts requires extremely high RF isolation—far beyond what typical commercial switches provide.

GP-Blocker delivers:

• 110 dB RF isolation via a two-stage RF switch

• Enhanced protection using an embedded L-band GNSS jammer

• Superior defense against even military-grade spoofing

Unlike conventional solutions, GP-Blocker overcomes RF cable leakage issues that reduce the effectiveness of multiple-switch setups.

Key Benefits for Your Organization

1. Assured Timing Integrity

Maintain PPS signal accuracy even when GNSS signals are compromised.

2. Reduced Downtime Risk

Automatic detection and switching ensure uninterrupted operations.

3. Defense-Grade Security

Designed to withstand high-power spoofing scenarios.

4. Easy Integration

Works standalone or alongside GP-Probe TGE2 systems.

5. Remote Management

RS485 interface with open API allows flexible monitoring and control.

6. Compact, Efficient Design

Small enclosure enables easy deployment in space-constrained environments.

Key Features

• Operates standalone or with GP-Probe TGE2

• RS485 interface with open API for remote control

• Two-stage RF switch with 110 dB isolation

• Compact enclosure: 35mm × 45mm

• DC switch to disable antenna preamplifier and simulate failure

• L-band jammer compatible with GPS, Galileo, BeiDou, GLONASS

• Adjustable jammer power regulation

• Backup power via GNSS receiver if main supply fails

• Includes GP-Divider 2-way GNSS splitter

Ideal Applications

GP-Blocker is designed for industries where precise timing is critical:

• Telecommunications networks

• Financial trading systems

• Data centers and cloud infrastructure

• Power grid synchronization

• Defense and aerospace operations

• Scientific research facilities

Protect Your Infrastructure Today

GNSS spoofing threats are evolving—your defenses should too. GP-Blocker ensures your timing systems remain accurate, secure, and resilient under even the most challenging conditions.

👉 Contact us today to learn how GP-Blocker can strengthen your GNSS timing security.

Download the full specification - Datasheet Here