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Precise Timing & APNT

GNSS for Precise Timing & APNT

Nanosecond-accurate GNSS timing, OCXO holdover, and Assured Positioning, Navigation & Timing for 5G/LTE synchronization, power grid stability, financial systems, and critical infrastructure.

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<5 ns
Timing Accuracy
OCXO
Holdover
AIM+
Anti-Jamming
PPS
1 Pulse-Per-Second
Overview

Critical GNSS Timing for Modern Infrastructure

5G base station synchronization, smart grid frequency management, financial transaction timestamping, and data center operations all depend on nanosecond-accurate GNSS timing. Disruption or spoofing of GNSS timing can cascade across entire networks, causing system-wide outages.

Eview GNSS timing receivers deliver <5 ns accuracy with AIM+ anti-jamming, OCXO holdover for continuity during GNSS outages, and multi-constellation redundancy — providing the APNT resilience required for critical infrastructure protection.

GNSS precise timing and APNT anti-jamming for critical infrastructure
Key Capabilities
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<5 ns timing accuracy (1-sigma, GNSS-locked)
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OCXO holdover — maintains timing during GNSS gaps
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AIM+ anti-jamming: 60 dB across all GNSS bands
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Anti-spoofing detection for critical timing security
✓
1PPS output + PTP/NTP synchronization support
Applications

Precise Timing & APNT Use Cases

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5G & 4G LTE Synchronization
GNSS-disciplined timing for base station frequency and phase synchronization. AIM+ ensures timing continuity even near high-power cellular transmitters.
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Smart Grid & Power Systems
Nanosecond-accurate timestamps for synchrophasors and PMUs. Spoofing protection prevents timing attacks on power infrastructure control systems.
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Financial Transaction Timestamping
UTC-traceable timing for MiFID II / ESMA-compliant financial transaction records. OCXO holdover maintains compliance during GNSS outages.
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Industrial & Factory Automation
Synchronized GNSS timing for distributed industrial control systems and precision manufacturing where time-stamped events must correlate across sites.
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Data Centers & Cloud Networks
PTP (IEEE 1588) grandmaster synchronization for data center networks. Multi-constellation GNSS reference ensures robust timing even with partial outages.
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APNT for Critical Infrastructure
Assured PNT combining AIM+ jamming suppression, anti-spoofing detection, and OCXO holdover — timing resilience beyond standard GNSS reliability.
FAQ

Precise Timing & APNT — Frequently Asked Questions

What is APNT and why is it critical for telecommunications?
APNT (Assured Positioning, Navigation, and Timing) refers to systems that remain reliable even when GNSS is jammed, spoofed, or unavailable. For 5G networks, OCXO holdover clocks and multi-constellation redundancy are key APNT technologies that maintain synchronization during GNSS outages.
What timing accuracy does 5G network synchronization require?
5G NR TDD requires time synchronization of ±1.5 µs between base stations. For fronthaul and eCPRI interfaces, this tightens to ±65 ns. Eview GNSS timing receivers deliver <5 ns accuracy — well within the tightest 5G timing requirements, with OCXO holdover maintaining accuracy during brief GNSS outages.
What is OCXO holdover and how long can it maintain timing?
An OCXO (Oven-Controlled Crystal Oscillator) continues generating accurate timing pulses when GNSS is unavailable. OCXO drift is typically <1 µs/hour, meaning Eview receivers can maintain sub-microsecond accuracy for 30–60 minutes after a GNSS outage — well within telecom and grid restoration timeframes.

Secure Your Critical Timing Infrastructure

Our GNSS timing specialists will recommend the right receiver, oscillator, and APNT configuration for your infrastructure requirements.

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