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5G & Wireless Infrastructure

5G base stations, O-RAN fronthaul, and small cells demand strict frequency accuracy, low phase noise, and PTP-grade holdover. AATA Japan supplies Japanese-made crystal units, TCXOs, VCXOs, and OCXOs designed to meet ITU-T G.8262 / G.8273.2 and 3GPP TS 38.104 timing requirements.

Section 01

Timing Requirements in 5G Networks

Frequency accuracy and phase synchronization define the boundary between a working cell and a degraded one. 5G NR specifies tight tolerances at every layer of the radio access network, from the Wide Area base station down to the Local Area cell.

Section 02

Synchronization Architecture — GNSS, PTP, and SyncE

Modern 5G transport relies on a layered synchronization stack. Time and frequency are distributed across the network through complementary protocols, and each one expects a stable local oscillator at the slave node.

5G timing distribution
5G synchronization architecture — GNSS, PTP, and SyncE distribution
Section 03

Phase Noise — Why It Matters for 5G NR

In 5G NR, EVM degradation directly limits the achievable modulation order and throughput. Massive MIMO and higher-order QAM (256QAM, 1024QAM) push close-in phase noise to the front of the system budget, especially in mmWave (FR2) deployments.

Section 04

Holdover & Long-Term Stability

When the upstream timing reference fails, the local oscillator is the only thing standing between a synchronized cell and a service outage. Holdover performance is defined by short-term stability, temperature behaviour, and aging rate.

Section 05

Use Case Mapping

Different points in the radio access network call for different oscillator grades. Selecting the right device early in the design avoids over-engineering at the edge and under-engineering at the core.

Oscillator selection by node
O-RAN distributed unit equipment rack with precision timing modules
Recommended components

Crystal timing devices for 5G & wireless.

VCXO and OCXO
01

VCXO & OCXO

Oven-controlled and voltage-controlled oscillators for macro base stations, BBU / DU nodes, and SyncE / PTP grandmaster timing where holdover is critical.

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TCXO and VCTCXO
02

TCXO & VCTCXO

Temperature-compensated and voltage-controlled TCXOs for small cells, O-RAN radio units, and GNSS-disciplined oscillator subsystems.

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SPXO
03

SPXO

Simple packaged crystal oscillators for baseband peripheral clocks, auxiliary references, and clock generation in wireless infrastructure.

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Crystal Unit
04

Crystal Unit

Bare quartz crystal resonators in industry-standard SMD packages for module-internal references and OEM clock sources.

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5G inquiry

Discuss your 5G timing requirements.

Whether you need a Class C OCXO for a Stratum-grade clock distribution rack or a low-power TCXO for an O-RAN radio unit, our sales team responds in English and ships worldwide. Send us your phase-noise plot, holdover spec, and target volume.

Send a message +81-45-662-0533