XLi Time & Frequency System 7
XLi-man, Issue 8, 6/17/2008, Rev. H
2
5
1
SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S
Have Quick Input
See “HaveQuick/1 PPS Time and Frequency Reference(87-8016-3)” on page 216.
1 PPS Input
See “HaveQuick/1 PPS Time and Frequency Reference(87-8016-3)” on page 216.
Aux Ref Input
If an Aux Ref input is available and enabled, the XLi assumes that Aux Ref is a better frequency source
than its own oscillator. If a timing reference is not available (or becomes unavailable) and Aux Ref is
enabled, the XLi locks to the Aux Ref input. Under those conditions, frequency output accuracy is equal
to the reference < 1 x 10
-12
.
Note: Manually set the time and date, when using 1 PPS or Aux Ref as the primary references. Set the
date (year) when using IRIG A000, A130, B000, B120, or NASA 36 as the primary reference.
See F3 – Time & Date (page 50)
.
Chassis
1 PPS Output: 10 μS to the incoming code
Stability of Frequency/Timing –
Allan Deviation:
5x10
-9
@ 10 sec
Accuracy of AM Code Output: 10 μS to the incoming code
Accuracy of DC Level Shift
Code Output:
10 μS to the incoming code
1 PPS Output: 10 μS to the incoming 1 PPS
Stability of Frequency/Timing –
Allan Deviation:
5x10
-9
@ 10 sec
Accuracy of AM Code Output: 10 μS to the incoming 1 PPS
Accuracy of DC Level Shift
Code Output:
10 μS to the incoming 1 PPS
1U Chassis: Standard 19" EIA Rack System, hardware included
Receiver Size: 1.75 in. x 17.1 in. x 15.35 in.
Weight: Standard configuration, without options ~9.25 lb. Fully loaded ~ 10.95 lb
2U Chassis: Standard 19" EIA Rack System, hardware included
Receiver Size: 3.5 in. x 17.1 in. x 15.35 in.
Weight: Standard configuration, without options ~12.55 lb. Fully loaded ~ 21.00 lb
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