Frequency StabilityConverter
AllanDeviation、Frequency Drift Rate、Aging RateConvert between
Input Parameters
Frequency Drift Rate D = σ(τ) × √(τ / 3)
ConverterResults
1.00×10⁻¹¹
AllanDeviation σ(τ)
5.77×10⁻¹²
Frequency Drift Rate D
4.98×10⁻¹⁰
Daily Drift (24h)
Aging RateParameters
Combined Parameter Input
Enter any two parameters, the third will be auto-calculated and validated
Frequency StabilityMetrics Comparison
10MHzFrequency Source，ADEV σ(1s)
±0.0001 Hz
100MHzFrequency Source，ADEV σ(1s)
±0.001 Hz
1GHzFrequency Source， Equivalent Jitter (1s Average)
- ps
Technical Notes
AllanDeviationFrequency Drift Rate Relationship (τ >> τ_w, Drift Dominated):
σ_y²(τ) ≈ D² × τ / 3 + σ_noise²(τ)
σ_y²(τ) ≈ D² × τ / 3 + σ_noise²(τ)
Aging RateDefined as daily frequency change rate:
Aging_rate = Δf / f₀ / day
Aging_rate = Δf / f₀ / day
AllanDeviationJitter (f₀ = 10MHz):
Jitter = σ_y(τ) × τ / (2π × f₀)
Jitter = σ_y(τ) × τ / (2π × f₀)
ConverterNotes：Frequency Stability have different applications in time and frequency domains. Allan Deviation suits short-term stability (seconds~ hours), Drift Rate describes long-term drift, and Aging Rate is the standard specification metric. Conversion between these metrics is based on different noise model assumptions. ConvertingrRange。
TypicalDevice Reference
Atomic Clock
ADEV(1s): 5×10⁻¹²
Drift Rate: ~0
Aging Rate: ±5×10⁻¹¹/days
Drift Rate: ~0
Aging Rate: ±5×10⁻¹¹/days
RbOscillator
ADEV(1s): 5×10⁻¹¹
Drift Rate: 1×10⁻¹⁰
Aging Rate: ±5×10⁻¹⁰/days
Drift Rate: 1×10⁻¹⁰
Aging Rate: ±5×10⁻¹⁰/days
OCXO
ADEV(1s): 1×10⁻¹²
Drift Rate: 5×10⁻¹²
Aging Rate: ±1×10⁻⁹/days
Drift Rate: 5×10⁻¹²
Aging Rate: ±1×10⁻⁹/days