1.7.7 10 MHz Output
Signal: 10 MHz sine wave
Signal Level: +13 dBm ±2dB into 50 Ω
Harmonics: ˗40 dBc minimum
Spurious: ˗70 dBc minimum TCXO
Connector: BNC female
Signature Control: This configurable feature removes the output signal whenever a major
alarm condition or loss of time synchronization condition is present. The output will be
restored once the fault condition is corrected.
Table 1-7:
10 MHz output — oscillator types and accuracies
Oscillator Type Accuracy
Low-phase noise Rubidium 1x10
-12
typical 24-hour average locked to GPS
1x10
-11
per day (5x10
-11
per month) typical aging unlocked
Rubidium 1x10
-12
typical 24-hour average locked to GPS
1x10
-11
per day (5x10
-11
per month) typical aging unlocked
Low-phase noise OCXO 1x10
-12
typical 24-hour average locked to GPS
2x10
-10
per day typical aging unlocked
OCXO 2x10
-12
typical 24-hour average locked to GPS
1x10
-9
per day typical aging unlocked
TCXO 1x10
-11
typical 24-hour average locked to GPS
1x10
-8
per day typical aging unlocked
Note: Oscillator accuracies are stated as fractional frequency (i.e. the relative fre-
quency departure of a frequency source), and as such are dimensionless.
See also "Configuring the Oscillator" on page215.
Table 1-8:
10 MHz output — oscillator stability
Oscillator Type
Medium-Term Stability
(without GPS after 2 weeks of GPS
lock)
Short-Term Stability (Allan vari-
ance)
Temperature
Stability
(p˗p)
1sec. 10sec. 100 sec.
Low-phase noise
Rubidium
5x10
-11
/month (3x10
-11
/month
typical)
5x10
-11
2x10
-11
5x10
-12
1x10
-10
Rubidium 5x10
-11
/month (3x10
-11
/month
typical)
2x10
-11
2x10
-12
2x10
-12
1x10
-10
1.7 Specifications
CHAPTER 1 • SecureSync User Reference Guide Rev. 26
25
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