XLi Time & Frequency System 223
XLi-man, Issue 8, 6/17/2008, Rev. H
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P7: Oscillators
The XLi comes with the standard TCVCXO oscillator described below. The following optional oscillators
are available as upgrades:
• OCXO Oscillator
• High Stability OCXO Oscillator
• Rubidium Oscillator
• High Performance Rubidium Oscillator
The stability of the following oscillators is dependent on the reference source. For reference source
accuracies, see “System Time & Frequency Accuracy” on page 6
.
Standard TCVCXO Oscillator
OCXO Oscillator Upgrade
High Stability OCXO Oscillator Upgrade
Frequency/Timing Allan Deviation,
Stability
1 x 10
-9
@ 1 sec
2 x 10
-10
@ 1K sec
1x 10
-12
@ 1 day
Tem p
5x10
-7
, over 0°C to 50°C when not locked to a reference
Drift Rate
5 x 10
-9
/ Day
Frequency/Timing Allan Deviation,
Stability
1 x 10
-10
@ 1 sec
1 x 10
-10
@ 1K sec
1 x 10
-12
@ 1 day
Tem p
1X10
-8
, over 0°C to 50°C when not locked to a reference
Drift Rate
5 x 10
-9
/ Day
Frequency/Timing Allan Deviation,
Stability
3 x 10
-11
@ 1 sec
3x 10
-11
@ 1K sec
1 x 10
-12
@ 1 day
Tem p
1x10
-9
, over 0°C to 50°C when not locked to a reference
Drift Rate
1 x 10
-10
/ Day
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