Symmetricom XLi User Manual

200 XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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1
TIME QUALITY INDICATORS
The XLi provides an estimate of the worst-case error based on the user-entered Time Quality Flags.
This is indicated by each of the four time quality lines changing to the high state in turn as the worst-case
error exceeds the threshold for that line. The time error may be determined from the table below. The
first column shows the pin number of the rear panel 50-pin connector. The second column shows the
time error threshold at the transition from low to high on that pin.
5 80’s of days 30 1’s of min
6 40’s of days 31 40’s of sec
7 20’s of days 32 20’s of sec
8 10’s of days 33 10’s of sec
9 1KPPS Strobe 34 8’s of sec
10 8’s of days 35 4’s of sec
11 4’s of days 36 2’s of sec
12 2’s of days 37 1’s of sec
13 1’s of days 38 800’s of msec
14 Time Quality Bit 2 39 400’s of msec
15 Time Quality Bit 3 40 200’s of msec
16 1PPS Strobe 41 100’s of msec
17 Time Quality Bit 4 42 80’s of msec
18 20’s of hours 43 40’s of msec
19 10’s of hours 44 20’s of msec
20 8’s of hours 45 10’s of msec
21 4’s of hours 46 8’s of msec
22 2’s of hours 47 4’s of msec
23 1’s of hours 48 2’s of msec
24 40’s of min 49 1’s of msec
25 20’s of min 50 Time Quality Bit 1
Table 4:
Pin# Output Pin# Output
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Symmetricom XLi Specifications

General

Brand	Symmetricom
Model	XLi
Category	Measuring Instruments
Language	English