Time & Frequency
Frequency Counter Calibration: 1 µHz to 50 GHz Coverage
GPS-disciplined frequency counters from Keysight, Pendulum, Fluke, and Stanford Research — what every metrology lab must verify.Read article →
Time and Frequency Calibration
ISO/IEC 17025:2017 accredited GPS-disciplined frequency, time interval, and pulse measurement — DC to 50 GHz · ANAB Certificate AC-1736
How do I find ISO/IEC 17025 accredited time and frequency calibration services in the US?
To find ISO/IEC 17025 accredited time and frequency calibration services for frequency counters, time interval analyzers, frequency standards, GPS-disciplined oscillators, and time code generators in the United States, contact an ANAB-accredited laboratory like Techmaster Electronics, LLC (cert AC-1736) — founded 1989, with five accredited US labs serving telecom and 5G, aerospace, defense, financial systems, and broadcast.
- Discipline: time and frequency calibration
- Instruments: frequency counters, time interval analyzers, frequency standards, GPS-disciplined oscillators, and time code generators
- Accreditation: ANAB ISO/IEC 17025:2017 · cert AC-1736 · valid through 2026-10-29
- US labs: Vista CA · Santa Clara CA · Orlando FL · San Antonio TX · Holly Springs NC
- Industries served: telecom and 5G, aerospace, defense, financial systems, and broadcast
- Free local pickup: Silicon Valley · Southern California · Orlando, FL
- On-site: Available nationwide for fixed or sensitive equipment
- Contact: +1-866-779-5695 · sales@techmaster.us
ANAB ACCREDITED · CERT AC-1736 · VALID THROUGH 2026-10-29
Time and Frequency Calibration
Techmaster Electronics provides ISO/IEC 17025:2017 accredited calibration of time and frequency instruments — frequency counters, time interval analyzers, GPS-disciplined oscillators, and pulse generators. From 1 µHz to 50 GHz with 5 parts in 10¹² time-interval uncertainty, our ANAB-accredited laboratories deliver NIST-traceable measurements for aerospace, telecom, satellite, and scientific customers across the United States.
Equipment We Calibrate
Our time and frequency calibration capabilities cover the full chain from primary atomic clocks to bench-top frequency counters and pulse generators. Each unit is calibrated against NIST-traceable standards with full uncertainty reporting included.
Frequency Counters & Universal Counters
Keysight 53230A/53132A, Pendulum CNT-104, Fluke PM6685, and Stanford Research SR620 — covering 1 µHz to 12.4 GHz with 10-digit/s resolution.
Time Interval & Phase Noise Analyzers
Stanford Research SR620 time interval, Symmetricom TSC 5125A phase noise analyzers, and Pendulum 3120A — 50 ns to 999 s, 5 parts in 10¹² stability.
GPS-Disciplined Oscillators & Rubidium Standards
Symmetricom 8040 GPSDO, Microsemi 3500/3525 cesium primary standards, SRS FS725 rubidium, and Trimble Thunderbolt GPS-disciplined time references.
Pulse Generators & Stopwatches
Keysight 33500B/33600A function/arbitrary generators, Hewlett-Packard 8082A/8112A pulse generators, and stopwatch calibration per NIST SP-960-12 totalize method.
Also calibrated: Rise/Fall Time Measurement (>2 ns) · Pulse Width Measurement (>5 ns) · Period (4.44 ns–10 s) · Cesium Primary Frequency Standards · Atomic Clocks (Hydrogen Maser, Rubidium) · Time Code Generators (IRIG-B) · IEEE 1588 PTP Grandmasters · NTP Time Servers · Synchrophasors / PMUs · OCXO/TCXO Crystal Oscillators
Industries We Serve
Mission-critical time and frequency calibration across the sectors where nanosecond accuracy and traceable synchronization are non-negotiable.
Aerospace & Defense
Radar timing, electronic-warfare time references, missile-guidance clocks, and avionics IRIG-B time-code generators — MIL-STD audit-ready.
Telecom & 5G
IEEE 1588 PTP grandmasters, SyncE network synchronization, base-station GPS timing modules, and packet timing analyzers for nationwide carriers.
Satellite & GNSS
GPS/Galileo/BeiDou ground stations, GNSS receiver calibration, atomic-clock disciplining, and satellite payload time references for civil and defense space programs.
Scientific & National Labs
Cesium primary frequency standards, hydrogen maser comparisons, fundamental-constant metrology, and university physics-department time-interval research.
Financial Services & Trading
MiFID II compliance timestamping (1 ms / 100 µs), high-frequency-trading time servers, exchange clock-synchronization audits, and order-flow timestamp verification.
Broadcast & Media
ATSC 3.0 broadcast timing, studio time-code reference, video sync generators, and IP video PTP grandmaster clocks for broadcasters and OTT platforms.
Power Generation & Utilities
IEEE C37.118 synchrophasors, PMU (phasor measurement unit) calibration, and grid time-synchronization equipment for transmission system operators.
Railway & Transportation
PTC (Positive Train Control) time references, signaling-system clocks, and EU ETCS time-of-day synchronization for rail OEMs and infrastructure operators.
Three Levels of Calibration
Every Techmaster calibration includes a calibration sticker on the instrument. Choose the documentation level that matches your audit, regulatory, or quality program needs.
1
Traceable Calibration
Standard tier
- Calibration sticker on the unit
- Certificate of calibration
- NIST-traceable standards
2
Z540 Calibration
Plus measurement data
- Calibration sticker on the unit
- Certificate of calibration
- As-found / as-left data report
- ANSI/NCSL Z540-1 compliance
Most Rigorous
3
ISO/IEC 17025 Accredited
Audit-ready accreditation
- Calibration sticker on the unit
- Certificate of calibration
- As-found / as-left data report
- Measurement uncertainties report
- ANAB Cert AC-1736 reference
Click here to learn more about our three calibration levels →
Our & Advantages
Why aerospace, defense, telecom, satellite, and scientific labs trust Techmaster for time and frequency calibration since 1989.
ISO/IEC 17025:2017 Accredited
ANAB Cert AC-1736 — full uncertainty budgets, NIST-traceable standards, and audit-ready documentation on every report.
GPS-Disciplined 5 parts in 10¹²
GPS-disciplined frequency references, cesium and rubidium standards, and time-interval analyzers with 5 parts in 10¹² stability — at our California labs.
Faster Than OEM
Standard 5-business-day turnaround with 1–2 day expedite available. Free local pickup in Silicon Valley, So-Cal, and Orlando.
Have a non-standard time or frequency instrument? Talk with our experts.
Our metrologists handle legacy HP/Agilent, custom test sets, and out-of-tolerance recovery cases that other labs decline. Send us your model number for a same-day capability check.
Frequently Asked Questions
Common questions about time and frequency calibration at Techmaster Electronics.
What frequency range and time-interval accuracy can Techmaster calibrate?
Our time and frequency scope covers 1 µHz to 50 GHz frequency calibration, 50 ns to 999 s time interval (5 parts in 10¹² stability), and 4.44 ns to 10 s period measurement — all GPS-disciplined and NIST-traceable.
Is time and frequency calibration accredited to ISO/IEC 17025:2017?
Yes. Techmaster Electronics is accredited to ISO/IEC 17025:2017 by ANAB (Certificate AC-1736) covering time and frequency (GPS-disciplined), electrical, RF, microwave, dimensional, mass, and EMC calibration. Every accredited certificate includes the ANAB logo, calibration uncertainties, and full NIST traceability.
How often should time and frequency standards be recalibrated?
Annual recalibration is the standard cycle for frequency counters, time-interval analyzers, and pulse generators. GPS-disciplined oscillators and atomic clocks are typically checked every 6 months due to drift sensitivity. Standard turnaround is 5 business days; 1–2 day expedite available.
Do you calibrate GPS-disciplined oscillators and atomic clocks?
Yes. We calibrate Symmetricom 8040 GPSDOs, Microsemi 3500/3525 cesium primaries, SRS FS725 rubidium, Trimble Thunderbolt, and hydrogen maser frequency standards — comparing against our GPS-disciplined reference at our laboratories with full uncertainty analysis.
Where do you perform time and frequency calibration?
Time and frequency calibration is performed at our Vista CA, Santa Clara CA, and Orlando FL laboratories — all three on the ANAB scope (cert AC-1736) for time and frequency parameters with GPS-disciplined reference clocks at each site. Free local pickup in Silicon Valley, Southern California, and Orlando.
Ready to schedule your time and frequency calibration?
Send your instrument list and we’ll respond within one business day with pricing, turnaround, and a shipping label or pickup window.
Related Articles
Deep dives from Techmaster’s metrology team on frequency counters, GPS timing, atomic clocks, and synchronization.
Synchronization
GPS-Disciplined Oscillator Calibration Methods
GPSDO calibration — Symmetricom 8040, Trimble Thunderbolt, and how to verify long-term stability traceable to NIST.Read article →
PTP / 1588
IEEE 1588 PTP Grandmaster Clock Calibration
PTP grandmasters and SyncE network sync — how to verify nanosecond accuracy for 5G timing compliance.Read article →
Atomic Standards
Atomic Clock & Rubidium Standard Calibration
SRS FS725 rubidium and Microsemi cesium primary standards — how Techmaster verifies 5 parts in 10¹² stability.Read article →
