Symmetricom SyncServer S100 User Manual page 30

Web Inte Web Interfac
precision: Thi
precision:
on onds ds to to th the e ne near ares est t po power
upperm upp ermos ost t 18 18 bi bits ts of of th the e ti time
the mic the micros roseco
root distance (also root distance
th the e sy sync nchro hroni niza zati tion on tre
si sinc nce e th the e Syn
pri priat ate e va valu lue e is is di disp spla laye yed. d. Depe
iti itive ve or or nega negativ tive. e.
root dispersion: Thi
root dispersion:
to to th the e pri prima mary ry ref
pos posit itiv ive e va valu lues es gre
reference ID: Thi
reference ID:
iz izat atio ion, n, whi while le th the e st stra ratu tum m is is 16 16, , th this is fi fiel eld d s s ho hows
fi fiel eld d wil will l st star art t wi with th a a va valu lue e of of INI
va valu lues es). ). On Once ce a a pe peer er ha has s be been en se sele lect cted ed, , th the e cl cloc ock k ma
erenc nce e ID ID fi fiel eld d wil ere
be be upd updat ated ed and
operat ope ratin ing g at at st strat
(e (e.g .g., ., GP GPS, S, IRI
er eren ence ce ID ID wil
betwee bet ween n th the e Syn
reference time (also reference time
an an upd updat ate e fro
lo loca cal l cl cloc ock k has
to to a a lo loc c al al ti time
on onds ds fo for r a a lo loca call lly y at atta tach ched ed ha hard rdwar
102 1024 4 se seco conds
system flags: system flags: The
Server. Serv er. The The def
n n kernel: The kernel:
adj adjtim time()
monitor: The monitor:
n n
ntp: ntp: Ena Enabl bles es th the e se serv rver er to to ad adju just st it its s lo loca cal l cl cloc ock k by by me
n n
stats: stats: The
n n
auth: The
auth:
n n
jitter: Ji Jitt tter er (al
jitter:
pon ponen ents ts gre great ater er tha
stability: Sta
stability:
ti time me. . It It is is us usua uall lly y aff
par parts ts pe per r mi mill llio ion n (pp
broadcastdelay: The
broadcastdelay:
mi mine ne th the e net network
Page e 18 18 .......................................................................... Pag
rface e
This s is is a a si signe gned d in inte tege ger r in indi dica cati ting ng th the e pre
wer of of two two. . A A ty typi pic c al al v v al alue ue is is -1 -18 8 fo for r a a Har
me st stam amp p fra
econd nd range range. .
(also root delay root delay ): ): Th Thi i s s i i s s a a me
tree. e. A A ty typi pica cal l va valu lue e fo for r a a Syn
SyncSe cServ rver er is is a a roo root t of of th the e sy sync nchro
Depend ndin ing g on on cl cloc ock k sk skew
This s is is a a si sign gned ed fi fixe xed-p
refere erenc nce e so sourc urce e at at th the e roo
greate ater r th than an ze zero ro are are pos
This s is is a a fo four-b ur-byt yte e fi fiel eld d us used ed to to id iden enti tify fy th the e ref
INIT T (m (may ay be be di disp spla lay y ed ed as as 73 73.7 .78. 8.73 73.8 .84, 4, th the e ASCI
will l ch chan ange ge to to STEP STEP (or
and the the ref refere erenc nce e ID ID wil will l id iden enti tify fy th the e se sele lect cted ed pe peer.
ratum um 1, 1, th the e ref refere erenc nce e ID ID wil
IRIG, G, FRE FREE). E). In In th the e ca case se whe
will l di disp spla lay y th the e IP IP ad addr dres ess s of of th the e s s er erve ver r or or a a ha hash sh un uniq ique ue to to th the e as ass s oc ocia iati tion on
SyncSe cServe rver r an and d th the e rem remote
(also reference timestamp reference timestamp ): ): The
from m th the e se sele lect cted ed pee peer. r. Repr Repres esent
has nev never er be been en sy sync nchro hroni nize zed, d, th the e va valu lue e is is ze zero.
me of of Th Thu, u, Fe Feb b 7 7 20 2036 36 6: 6:28 28:1 :16. 6.00 000. 0. Th
ware e re refe fere renc nce e (e (e.g .g., ., GP
nds fo for r a a rea readi dily ly ac acce cess ssib ible le rem
These se fl flag ags s def defin ine e the
defin init itio ion n of of th the e va varia riabl bles es is is pro
The NTP NTP da daem emon on is is en enab able led d fo for r th the e pre
e() sy syste stem m cal call. l.
The NTP NTP da daem emon on is is en enabl
The NTP NTP daem daemon on is is ena enabled
The NTP NTP daem daemon on is is ena enable
(also so ca call lled ed ti timi ming ng ji jitte tter) r) ref
than n 10 10 Hz. Hz.
Stabi bili lity ty ref refers ers to to ho how w wel well l the
affec ecte ted d by by agi aging, ng, env
(ppm). m).
The bro broadc adcas ast t an and d mu
work de dela lay y bet betwee ween n th the e lo loca cal l an and d rem
..........................................................................99 997-0
preci cisi sion on of of the
fract ctio ional nal co comp mpone onent nt ha have ve va valu lue, e, in indi dica cati ting ng a a pre
meas asur ure e of of th the e to tota tal l ro roun und d tr trip ip de del l ay ay to to th the e ro root ot of
SyncSe cServ rver er ope operat
hroni niza zati tion on tre tree e For For oth
ew and and di disp spers
d-poi oint nt nu numb mber er in indi dica cati ting ng the
root t of of th the e sy sync nchro hroni niza zati tion on su subne
possi sibl ble. e.
refere
ws th the e pr prog ogre ress ssio ion n of of th the e NTP
may y be be st step eppe ped, d, in in whi
(or 83. 83.84 84.69 .69.8 .80). 0). On Once ce th the e PLL
will l di disp spla lay y the the so sourc urce e fo for r th the e lo loca cal l ti timi ming ng ref
where re th the e se sele lect cted ed pe peer er is is an anot othe her r NTP
ote se serve rver. r.
The ti time me whe when n th the e Syn
ented ed us usin ing g ti time me st stam
ro. A A ti time
This is v v al alue ue is is ty typi pic c al ally ly up upda date ted d ev ever ery y 16 16 se sec- c-
GPS, S, IRI IRIG G ) ) an and d in in an an in inte terv rval al of of 64 64- -
remot ote e NTP NTP se serv rver. er.
the co confi nfigur gured ed beh behav avio ior r NTP NTP dae
provi vide ded. d.
preci cisi sion- on-ti time me ke kerne
abled ed it its s mo moni nito torin ring g fa faci cili lity ty. .
mean ans s of of NTP
bled its itsst stati atisti stics cs fac facili ility. ty.
bled d its itsaut authent hentic icati ation on fac facili ility. ty.
refers ers to to sh short ort-te -term rm va varia riati tions
the Syn SyncSe cServ rver er ca can n ma main inta tain in a a co cons nsta tant nt fre
enviro ironm nmen ent t ch chan anges ges, , et etc. c. The
mult ltic icas ast t mo mode des s req requi uire re a a sp spec ecia ial l ca cali libra
remot ote e se serv rvers ers. . Ty Typi pica call lly, y, thi this s is is don
the se sele lect cted ed pe peer er cl cloc ock, k, in in se sec- c-
Hardwa dware re Clo Clock ck whe where re th the e
preci cisi sion on in in
ratin ing g at at st strat ratum um 1 1 wou would ld be be 0 0
other er st strat ratum um le leve vels ls, , an an ap appro
ersio ion, n, thi this s va valu lue e co coul uld d be be po pos- s-
the ma maxi ximu mum m err error or rel relat ativ ive e
bnet, t, in in se seco conds nds. . On
erenc nce e cl cloc ock k so sourc urce. e. At At in init itia ial- l-
NTP c c lo lock ck PLL PLL. . Th
ASCII I de deci cima mal l
which ch ca case se th the e re ref- f-
PLL is is lo lock cked ed, , th the e st strat ratum
er. In In th the e ca case se of of a a Syn SyncSe cServe
refere erenc nce e
NTP se serv rver er, , th the e re ref- f-
SyncSe cServ rver er la last st rec recei eive ved d
amp p fo forma rmat t in in lo loca cal l ti time me. . If If the
me st stam amp p of of ze zero ro co corre rresp spond
daemo mon n run runni ning ng on on the the Syn
rnel l su suppo pport rt fo for r th the e nt ntp_
NTP. .
ons in in fre freque quenc ncy y wit with h co com-
freque quenc ncy y ov over
The va valu lue e is is ex expre press ssed ed un unit its s of
brati tion on to to de deter
done e
7-0152 1520-0 0-03 3 Rev Rev. . A A
of
pro- -
Only ly
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um wil will l
rver r
the
onds s
Sync- c-
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