System Time & Frequency Accuracy; Gps Receiver; Aux Ref Input; Chassis - Symmetricom XLi IEEE 1588 User Manual

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System Time & Frequency Accuracy
The tables below describe system clock accuracy while locked to the reference source indicated.
Currently, GPS is the only supported reference source.

GPS Receiver

1 PPS Output:
Frequency Output Accuracy:
Frequency/Timing, Allan
Deviation, Stability:
AM Code Output Accuracy:
DC Level Shift Code Output
Accuracy:
Time to System Lock
See GPS Signal Strength Requirements (page 17)

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
Note:
To set the time and date manually, see

Chassis

1U Chassis:
Receiver Size:
Weight:
10
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± 30 ns RMS, 100 ns peak without SA (99%)
-12
< 2x 10
-9
1 x 10 @ 1 sec
-10
2 x 10 @ 1000 sec
-12
1x 10 @ 1 day
10 μ S to the 1 PPS
200 ns to the 1 PPS
<20 min. typical
.
-12
Standard 19" EIA Rack System, hardware included
1.75 in. x 17.1 in. x 15.35 in.
Standard configuration, without options ~9.25 lb. Fully loaded ~ 10.95 lb
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and GPS C/A Receiver (87-8028-2) (page
"F3 – Time & Date" on page
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40.
XLi IEEE 1588 Clock
997-01510-03, Rev. C, 12/12/2006
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4).