Atec Agilent-53200A Series - Manual (Page 15)

15
Timebase
Standard
TCXO
Option 010
Ultra-High Stability OCXO
Aging 1 (spec)
24-hour, T
CAL
±1 °C ± 0.3 ppb (typ)
30-day, T
CAL
±5 °C ± 0.2 ppm (typ) ± 10 ppb
1-year, T
CAL
±5 °C ± 1 ppm ± 50 ppb
2-year, T
CAL
±5 °C ± 0.5 ppm ± 25 ppb
Temperature (typ)
0 ºC to 55 ºC relative to 25 °C 2 ± 1 ppm ± 5 ppb
Factory Calibration uncertainty
Initial factory calibration 3 (typ) ± 0.5 ppm ± 50 ppb
Supplemental characteristics (typ)
5-min. warm-up error 4 ± 1 ppm ± 10 ppb
72-hour retrace error 5 < 50 ppb < 2 ppb
Allan deviation t = 1s 1 ppb 0.01 ppb
Timebase Uncertainty = ( Aging + Temperature + Factory Calibration Uncertainty )
1. All Timebase Aging Errors apply only after an initial 30-days of continuous powered operation and for a constant altitude ±100 m.
After the first 1-year of operation, use ½ x (30-day and 1-year) aging rates shown.
2. Additional temperature error corresponding to ‘0 ◦ C to 55 ◦ C relative to 25 ◦ C’ is only included in the time base uncertainty equation if
the temperature of the operating environment is outside the ± 5 ◦ C T
CAL
range. If temperature is within T
CAL
± 5 ◦ C, that error term
is already included in the aging term above.
3. This term only applies to the factory calibration. Once the instrument is re-calibrated, the term is no longer included.
4. Warm-up error applies when the instrument is powered on in a stable operating environment.
When moved between different operating environments add the Temperature error during the initial 30-minutes of powered operation
5. Retrace error may occur whenever the instrument line-power is removed or whenever the instrument is battery operated and the
battery fully discharges. Retrace error is the residual timebase shift that remains 72-hours after powering-on an instrument that has
experienced a full power-cycle of the timebase. Additional frequency shift errors may occur for instrument exposure to severe
impact shocks >50 g.
Timebase
Front/rear view of 53230A