Precision and portability. The most compact resilient grandmaster in the TimeBeat lineup.
< 30 ns
GNSS accuracy
1.5 µs
24 h DOCXO holdover
144×82 mm
Palm-sized
Battery
On-board resiliency
Gallery
Open Time Appliance Mini — top angle
Open Time Appliance Mini — top angle
Compact form factor — 144 × 82 mm
Compact form factor — 144 × 82 mm
In use — broadcast gallery
In use — broadcast gallery
Front panel — dual 1 GbE and console
Front panel — dual 1 GbE and console
Deployed — data centre environment
Deployed — data centre environment
In use — outside broadcast
In use — outside broadcast
Precision v3 module — full multi-constellation
Precision v3 module — full multi-constellation
Precision Lite module — cost-optimised
Precision Lite module — cost-optimised
Interactive 3D
Drag to rotate the Open Time Appliance Mini and explore the chassis, ports and oscillator from any angle.
Precision anywhere
What it is
The Open Time Appliance Mini is TimeBeat's most compact grandmaster. With a multi-band GNSS receiver, integrated DOCXO, dual Ethernet ports and an on-board battery pack, it operates as a resilient grandmaster that survives power outages — or as a portable reference standard you can carry to site for validation and testing. Elite DOCXO holdover keeps it within 1.5 µs for 24 hours without GNSS.
Two variants
Same DOCXO, same battery, same chassis — different GNSS constellations and port count.
The flagship variant — dual Ethernet, full multi-constellation GNSS, OCXO backup holdover, and maximum redundancy in the same palm-sized chassis.
A leaner variant that cuts cost without sacrificing DOCXO holdover or portability — ideal for edge deployments where a single sync port is sufficient.
Know which variant fits your deployment?
Tell us your accuracy requirement and port count — we'll confirm the right module, pricing and lead time within one business day.
Capabilities
DOCXO HOLDOVER
1.5 µs drift over 24 hours
DUAL 1 GbE
Redundant PTP/NTP output
BATTERY BACKUP
Survives power failure
Keeps serving time through power-supply failure or transport — a grandmaster that survives outages, not one that depends on them.
Double Oven-Controlled Crystal Oscillator gives parts-per-trillion stability and 1.5 µs holdover over 24 hours without GNSS. Ultra-high-precision frequency source in a palm-sized chassis.
Two 1 GbE PTP/NTP ports on the front panel — run hot-standby or diverse-path sync without adding a second device. (Precision Timing Lite uses one port.)
Default, Enterprise, Power Profile, Telecom (G.8265/G.8275), Broadcast (DOCSIS 3.1, SMPTE 2059-2, AES67, IEEE 802.1AS TSN/AVB) — all on the same interface.
Carry it to site, plug it in, and validate PTP deployments without pulling a rack apart. Wi-Fi antenna compatible and USB Type-C serial console for on-the-spot diagnostics.
Freq-A and Freq-B SMA outputs (1 Hz–1 GHz), 10 MHz out, 1 PPS out, GNSS L1/L2/L5 multi-band SMA, Wi-Fi antenna SMA, and a 30 W barrel jack for primary power.
The portable form factor doesn't compromise on signal quality. TimeBeat's jitter attenuation engine filters network noise and oscillator phase noise in real time, delivering a clean clock signal even in field conditions with intermittent GNSS and variable network paths.
Specifications
Timing performance
GNSS
Front panel
Rear panel
Physical
Where it works
Use case 01
Redundant power architecture and compact form factor slide into broadcast setups for live production and content scheduling. Battery backup means sync survives the chaos of live events.
Use case 02
Space-efficient reference standard for cell-site sync, antenna alignment and fronthaul validation. Carry it between sites, plug in, measure — no rack, no problem.
Use case 03
A pocketable grandmaster engineers take to site. On-board battery means no waiting for a power drop — plug in, sync up, measure, pack up and move on.
Use case 04
When a 1RU appliance is overkill and a PCIe card isn't an option, the Mini sits on a shelf at the edge and rides out power outages on battery without losing sync.
Free download
Full specs, block diagram and ordering information — emailed to you instantly.
Seen your deployment in one of these?
Get a quote tailored to your use case — volume, variant selection, and lead time in one response.
In your network
Portable grandmaster · field testing and lab validation · DOCXO holdover
Watch the demo
Hardware walkthrough, field deployment, and first synchronisation.
DOCXO precision, battery resilience, and dual-band GNSS in a 144 mm portable grandmaster — built for field validation, live events, and edge deployments.
Standards & compliance
Get pricing
Tell us how many units, which variant (Precision v3 or Lite), and where they’re going. We’ll come back with pricing, lead times, and any technical recommendations — within one business day.
Library
Product sheets, field guides, deployment notes and blogs relevant to this hardware.
Why a single-grandmaster deployment is a DORA Article 11 problem, what A/B/C redundancy looks like in a single rack unit, and how the Open Time Appliance Shelf turns three independent Rubidium Black+ grandmasters — with independent GNSS antennas — into the default finance-venue topology for 2026 and beyond.
An engineering decision framework for picking oscillator tier on an Open Time Appliance. Drift maths that matter, real-world holdover scenarios, and where each tier is the right economic answer — not just the best spec sheet.
How the Timebeat Agent fuses GNSS, upstream PTP feeds, PPS inputs and oscillator discipline into a single weighted clock output — the same BIPM-style ensemble approach used to produce UTC itself, applied at the site level.
A virtual grandmaster clock is an IP endpoint that looks like a single PTP grandmaster to downstream clients but is backed by multiple physical Timebeat Agents — redundancy, capacity and failover at the topology level, with a single client-facing configuration.
What a PTP grandmaster clock actually does, how to choose one, and what separates a grandmaster you can trust from one that quietly drifts. Written by TimeBeat's engineering team for network architects deploying IEEE 1588 in production.
How precision timing actually works in 5G fronthaul networks — the time-error budget, the ITU-T accuracy classes, the role of G.8275.1, and what it takes to operate a fronthaul timing fabric without dropping calls or losing handovers. Written by TimeBeat's engineering team for mobile network operators and O-RAN integrators.
Ready to deploy
