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18 Chapter 1
Agilent EXA Signal Analyzer
Frequency and Time
Description Specifications Supplemental Information
Precision Frequency Reference
(Option PFR)
Accuracy ±[(time since last adjustment
× aging rate) + temperature
stability + calibration
accuracy
a
]
b
a. Calibration accuracy depends on how accurately the frequency standard was adjusted to 10
MHz. If the adjustment procedure is followed, the calibration accuracy is given by the specifi-
cation “Achievable Initial Calibration Accuracy.”
b. The specification applies after the analyzer has been powered on for four hours.
Temperature Stability
20 to 30 °C
±1.5 × 10
−8
5 to 50 °C
±5 × 10
−8
Aging Rate
±5 × 10
−10
/day (nominal)
Total Aging
1 Year
±1 × 10
−7
2 Years
±1.5 × 10
−7
Settability
±2 × 10
−9
Warm-up and Retrace
c
300 s after turn on
900 s after turn on
c. Standby mode does not apply power to the oscillator. Therefore warm-up applies every time
the power is turned on. The warm-up reference is one hour after turning the power on. Retrac-
ing also occurs every time the power is applied. The effect of retracing is included within the
“Achievable Initial Calibration Accuracy” term of the Accuracy equation.
±1 × 10
−7
of final frequency
(nominal)
±1 × 10
−8
of final frequency
(nominal)
Achievable Initial Calibration Accuracy
d
±4 × 10
−8
Standby power to reference oscillator Not supplied
Residual FM
Center Frequency = 1 GHz
10 Hz RBW, 10 Hz VBW
≤ 0.25 Hz x N p-p in 20 ms
e
(nominal)