Symmetricom SyncServer S100 User Manual page 29

main inta tain ined ed wi with th two ma
le leve vel, l, so so th the e rat
error r me erro
leap indicator (LI): leap indicator (LI):
The e Le Leap ap In Indi dic c at ator or (L (LI) I) is is a a two Th
following informat following
n n
n n
L L I I V V a a l l u u e e
0 0 0 0
01 01
10 10
1 1 1 1
When n th the e S S yn yncS Whe
the al alarm the
an an NTP
so sour urce ces. s. On
in indi dica cato tor r to to an an app
page e ca can n be be co confi nfigur pag
cator or cha cat
stratum: stratum:
Th This is is is an an ei eigh ght- t-bi bit t in inte tege ger r th that at in indi dica cate tes s th the e po posi siti tion on of of an an NTP
hi hier erar arch chy. y. It It is is ca calc lcul ulat ated ed by by ad addi ding ng 1 1 to to th the e s s tr trat atum
For For th the e Syn
0 0
1 1
2 2 - - 1 1 5 5
16 16-2 -255 55
For For ex exam
n n
n n
n n
The The se sett ttin ings gs on on th the e
two pe peer ers s at at th the e ne next xt lo lower
rate e of of on ongoi going ng pol
mess ssage ages s are are be bein ing g ret return
information: ion:
Adv Advanc ance e warn warnin ing g th that at a a le leap ap se seco cond nd adj
en end d of of th the e cu curren rrent t da day. y. Lea Leap p se seco cond nds s are
(BIP (BIPM) M) in in ord order er to to sy sync nchro hroni nize ze the
Whe Wheth ther er th the e NTP NTP da daem emon on is is sy sync nchro
(o (on n pa page ge 33 33) ) pa page ge af affe fec c t t LI LI be beha havi vior or. .
- Prefs - Prefs
0 0 N N o w o wa a r r n n i i n n g g . .
1 1 Le Leap ap se seco cond nd in inse ser r tio tion: n: L L as ast t mi min n ut ute e o o f f th the e da day y h h as as 61 61 se seco cond nds. s.
2 2 Le Leap ap se seco cond nd de dele letio tion: n: L L as ast t mi min n ut ute e of of th the e da day y ha has s 59 59 se seco con n ds ds. .
3 3 Al Ala a r r m m co con n d d it itio ion n ( ( No
cSer erve ver r or or NTP NTP da daem
arm co cond ndit itio ion. n. Thi This s al alarm
NTP s s er erve ver r (t (the he Sy Sync ncSer Serve ver) r) is is pr pres esen ent, t, bu but t th that at it it ha has s ye yet t to to v v al alid idat ate e it its s ti time
Once ce th the e Sy Sync ncSe Serv rver er fi find nds s a a va vali lid d so sour urce ce of of ti time
approp ropria riate te va valu lue. e. The
gured ed to to gen genera
changes nges sta state. te.
SyncSe cServ rver, er, th the e st strat ratum
S S t t r r a a t t u u m m
H H a a r r d d w w a a r r e C l e C lo o c c k k w w h h e e n n l l o o c c k k e e d d . .
P P r r i i m m a a r r y y s s e e r r v v e e r r
S S e e co con n d d a a r r y y se ser r v v e e r r
Unsyn Unsynchr chron onize ized, d, un unre reach
ampl ple, e, th the e Syn SyncSe cServe rver r is is: :
st strat ratum um 1 1 whe when n th the e Hard Hardware
ho hold ldov over er mo mode, de, or or in in fre freeru
st stra ratu tum m 2 2 th thro roug ugh h 15 15 whe when n it it is is sy sync nchr hron oniz ized ed to to a a re remo
st strat ratum um 16 16 whe when n it it is is un unsy sync nchro
timin timing g informa information. tion.
NTP - Prefs NTP - Prefs
99 997-0 7-0152 1520-0 0-03 3 Rev Rev. . A A ..........................................................................
wer st stra ratu tum m le leve vel l an and d on one e pe peer er at at th the e sa same
polls ls is is us usua uall lly y no not t si sign gnif ific icant
urned ed fo for r ev every ery pol poll. l.
two-b -bit it bi bina nary ry nu numb mber er in in th the e NTP
adjus ustm tmen ent t wil
are ev even ents ts ma
the UTC UTC ti time me sc scal ale e wit
hroni nize zed d to to a a ti timi ming ng ref
M e e a a n n i i n n g g M
Not t sy syn n ch chr r o o n n iz ize e d d ) )
emon on is is st star arte ted d or or re rest star arte ted, d, th the e le leap ap in indi dica cato tor r is is s s et et to to "1 "11" 1", ,
arm co condi nditi tion on ma make kes s it it po poss ssib ible le fo for r NTP
The NTP Leap Change Alarm NTP Leap Change Alarm on
erate te an an al alarm arm an and d se send nd no noti tifi fica cati tions
um of of th the e NTP
um va valu lues es are are de defi fine ned d as as fo foll llows
D D e e f f i i n n i i t t i i o o n n
achab able le. .
ware Clo Clock ck (s (stra tratu tum m 0) 0) is is sy sync nchro
erun n mo mode. de.
hroni nize zed, d, in indi dica cati ting ng th that at it it is is se searc
(on (on pag page e 33 33) ) pag page e af affe fect ct st strat
..........................................................................
STA STAT T US
ant, , ev even en when when co conne nnect ctiv ivit ity y is is lo lost st and
NTP pa pack cket et he head ader er th that at pr prov ovid ides es th the e
will l be be ma made de to to the the UTC UTC ti time
manda ndate ted d by by the the worl world d ti time me aut
with h the the ear earth th's 's rot rotat atio ion. n.
refere erenc nce. e. The The se sett ttin ings gs on on th the e
NTP cl clie ient nts s to to rec recog ogni nize ze tha
me fr from
me an and d se sets ts it its s c c lo lock ck, , it it se sets ts th the e le leap ap
on th the e ADMIN - Alarms ADMIN - Alarms
ons ea each ch ti time me the
NTP no node de wi with thin in an an NTP
NTP . .
sys system tem peer peer
ows: :
hroni nize zed d to to an an in inpu put t ref
mote te NTP NTP se serv rver er. .
archi hing ng for for a a va vali lid d so sourc
ratum um beh behav avio ior. r.
US - - NT NTP P
me st stra ratu tum m
and
mesc scal ale e at at the the
autho horit rity y
NTP NTP
that t
om it its s ti time me
the le leap ap in indi di- -
NTP ti timi ming ng
refere erenc nce, e, in in
urce e of of
Pa Page ge 17 17