Carrier
Carrier frequency measurement. Determine the exact frequency value of the beacon signal relative to the reference.
✓ PRO + Hobby
Welcome to FMT
Check Your Station's Accuracy On Air
FMT is an experimental and educational direction in amateur radio: we help compare synchronization accuracy and open new opportunities for experiments. Our reference station transmits signals, and you simply receive, measure and share results. It's easy, interesting and accessible to everyone — even without special laboratory equipment.
FMT Station
Reference transmitter
Carrier
Pulse
1PPS offset
→
Your Receiver
SDR / transceiver + software
→
Platform
Validation & scoring
→
Leaderboard
Your results
The Essence of FMT Competitions
Your task is to remotely measure, with maximum possible accuracy, the signals of a special amateur radio beacon from HF bands at a strictly specified time.
Pulse
Pulse signal duration measurement. Record the time characteristics of modulated pulses.
✓ PRO + Hobby
1PPS Offset
Second mark offset measurement. Determine the exact arrival time of the 1PPS pulse relative to UTC.
✓ PRO only
Session duration
30 minutes
Signal transmission time
Search range
±20 Hz
From announced frequency
Time accuracy
Strict UTC
Announced start time
PRO Level
All three measurements: Carrier + Pulse + 1PPS Offset. Maximum accuracy and complete synchronization assessment.
Hobby Level
Two measurements: Carrier + Pulse. No 1PPS offset scoring — perfect for beginners and basic equipment.
🔬
Calibration Before Tour
Before each tour, the beacon operates in reference signals mode. During this time, you can check your equipment and accurately measure the offset relative to the beacon signals.
Reference values are published on the website — compare your measurements, determine the 1PPS offset and calibrate your receiver for maximum accuracy during competitions.
💡 Tip:
Use the calibration session to determine your equipment's system delay
Why FMT is Important and New for Radio Amateurs
We offer an accessible mass platform for measuring time and frequency accuracy
New Dimension in the Hobby
Traditionally, radio amateurs compete in distance or transmission speed. FMT opens a completely new direction — accuracy and stability. This is not just QSO, this is metrology on air.
Accessible Scientific Accuracy
Previously, high-precision frequency and time measurements were only available to professional laboratories. Today with SDR and free software you can achieve accuracy that was only a dream 10 years ago.
Real Equipment Verification
Many radio amateurs use GPS for synchronization, but few know the real accuracy of their system. FMT provides an objective assessment: how stable is your generator, how accurate is your GPSDO, does the rubidium standard work as stated.
Global Community of Like-Minded People
Join a community of operators around the world who share a passion for precision. Exchange experience, measurement methods, compare results and improve your skills together.
Transparent Scoring System
The scoring algorithm is completely open. Anyone can check how points are calculated, understand the methodology and suggest improvements. No subjective assessments — only physics and mathematics.
Progress is Visible Immediately
Tours every two weeks allow you to quickly see the results of your equipment improvements. Replaced crystal with TCXO? Added GPS discipline? Improved antenna? The result will appear in the very next tour.
How to Start in One Evening
Registration takes a couple of minutes — participation is open to every radio amateur.
1. Join the Community
Create an account and participate in the project
2. Listen to the Reference
Tune to the station broadcast — we transmit carrier, pulse and 1PPS.
3. Submit Results
Enter measurements in the online form: recordings and basic tools are enough.
Reference Station and Equipment
We maintain a station that broadcasts precise reference signals on air. Learn about the generators, antennas and methods we use so you can fairly evaluate your own system.
View equipment descriptionNo Laboratory Required
Even a simple SDR receiver and free software allow you to participate, compare yourself with others and improve your skills in time and frequency precision.