Symmetricom SyncServer S100 User Manual page 49

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REFERENCES - GPS REFERENCES - GPS
GPS GP
Th This is pa page ge c c an an be be us used ed to to vi view
GPS GPS Ant
Status: Status:
Current Current Positi
and and se seco conds
va valu lues es ca can n be be per
Mode Mode
n n
The The Hard Hardware ware Clo Clock ck is is sy sync nchro
0 0 to to th the e NT NTP P da daem emon on. .
The The NTP NTP dae daemo mon n is is sy sync nchro
St Stra ratu tum m 1 1 to to th the e ne netwo twork rk. .
Hardware ware Clo Clock ck en enter ters s ho hold ldov over er whe
Input t Refere Reference nces s are are ava
holdov dover: er:
The The Hard Hardware ware Clo Clock ck us uses es th the e in inte terna
The The NTP NTP dae daemo mon n (Str (Strat atum
Refere Ref erenc nce e = = the the nam name e of of th the e la last st In Input
The The Sync SyncServ Server er est estima imates
ware e Clo war Clock ck ti time me an and d UTC UTC. .
If If two two or or mo more re sy sync nchro hroni nizi zing ng NTP
ac accu cumu mula lates tes to too o mu much ch ti time
ch chron roniz izes es wit with h th the e bes best t as asso soci ciat atio ion, n, wit
Hardware ware Clo Clock ck le leav aves es hol
An An In Input put Refe Referen rence ce bec becom
Stratum Strat um 1 1 opera operatio tion.) n.)
The The est estima imated ted tim time e error error exc
the est estima imated ted tim time e error error exc exceeds
The The Hard Hardware ware Clo Clock ck rep report
I If f on one e or or mo more re sy sync nchro hroni nizi zing ng NTP
ch chron roniz izes es wit with h th the e bes best t on one, e, wit
If If no no sy sync nchro hroni nizi zing ng NTP NTP as asso soci ciat atio ions ns are
mi mine ned d by by th the e s s et etti ting ngs s on on th the e
Wi With th th the e S1 S100 00, , S3 S300 00 an and d S35
Wit With h th the e S20 S200, 0, S25 S250, 0, and and S25
unti until l an an Inpu Input t Refere Reference nce bec
S Posi sitio tion Po n andOp and Operati
Anten enna na Cabl Cable e Del Delay ay. .
In Indi dica cate tes s whe whethe ther r the the GPS
: : The The GPS GPS an anten
Position on
nds, , and and the the ca cardi rdina nal l po poin ints ts of of th the e co comp
perma mane nentl ntly y se set t whe
: :
: : In In thi this s mo mode de, , th the e rec
Survey Survey
Pos Posit itio ion n Hol Hold d mo mode. de. Use Use th this is se sett ttin ing g fo for r st stat atio ionar
99 997-0 7-0152 1520-0 0-03 3 Rev Rev. . A A ..........................................................................
hroni nize zed d to to one one of of the the Inp
hroni nize zed d to to th the e Hard Hardware ware Clo
when n the the Inp Input ut Ref
availa ilable ble. .
rnal l os osci cill llat ator or to to ke keep ep ti time
um 1) 1) rem remai ains ns sy sync nchro hroni nize zed d to to th the e Hard
put Ref Refere erenc nce). e).
tes the the tim time e error error (dif (differe ference
NTP as asso soci ciat atio ions ns are are av avai aila labl ble e and
me err error, or, th the e NTP NTP dae daemo mon n "d "drop
with h a a co corres rrespon
holdov dover er whe when n on one e of of th the e fo foll llowi
omes es av avai aila labl ble e ag agai ain. n. (As (As a a res
exceeds eeds the the use user-con r-config figurab
eeds the the use user-co r-confi nfigura gurable
orts s to to th the e NTP NTP dae daemo mon n tha
NTP as asso soci ciati ations ons are are av avai aila labl ble, e, th the e NTP
with h a a co corres rrespon pondi ding ng ch chan ange ge to to it its s st strat
are av avai aila labl ble, e, th the e NTP
page. e. See pag See
NTP - Prefs NTP - Prefs
S350, 0, th the e Har Hardwa dware re Clo Clock ck sy sync nchr hron oniz izes es to to th the e NTP
S250i 0i, , th the e Hard Hardware ware Clo Clock ck "f "fly lywhe
become omes s ava availa ilable ble agai again. n.
erating ngMo Mode de
ew or or se set t th the e GP GPS S re rece ceiv iver er's 's Po
GPS rec recei eive ver r is is a a va vali lid d ref
tenna na po posi siti tion on in in La Lati titu tude de an and d Lon
mpas ass s fo foll llowed
when n th the e i is s s s et et to to
GPS Mode GPS Mode
recei eive ver r su surv rvey eys s an and d av avera
nary y app
..........................................................................
REF REFERE ERENCE
Input ut Ref Refere erenc nces es and and rep report
Clock ck "re "refer ferenc ence e cl cloc ock" k" and
Refere erenc nce e be beco come mes s un unav avai aila labl ble e and
me (fl (flywh ywheel eelin ing). g).
Hardware ware Clo Clock ck (Str
nce) ) betwe between en the the osc oscill illato ator-bas
and the the Hard Hardware
rops" s" th the e Hard Hardware ware Clo
pondi ding ng ad adju just stme ment nt to to it its s Stra
owing ng oc occu curs rs: :
resul ult, t, th the e NTP NTP dae daemo mon n ret
urable le . .
Tim Time e Erro Error r Li Limi mit t
ble : :
Ti Time me Erro Error r Li Limi mit t
that t it it is is un unsy sync nchro hroni nize zed d (Str
NTP dae daemo
ratum um. .
NTP da daem emon on's 's be behav
(o (on n pa page ge 33 33). ).
NTP - Prefs NTP - Prefs
NTP da daem
wheel els" s" on on th the e in inter
Posi siti tion on an and d Mo Mode de, , as as wel
refere erenc nce e (lo (lock cked ed) ) or or no not t (un
Longi gitu tude de by by deg degree rees, s, mi minut
owed by by th the e al alti titud tude e in in Me
. .
Position Positi on Hold Hold
erages ges it its s po posi siti tion on bef before ore swi
appli lica cati tion ons, s, su such ch as as se serve
NCES S - - G G PS PS
orts s Stra Stratum tum
and rep report orts s
and no no
(Stratu atum m 0, 0,
r-based ed Hard- Hard-
ware Clo Clock ck
Clock ck an and d sy syn- n-
Stratum tum. .
return urns s to to
(Strat atum um 16 16). ).
mon n sy syn- n-
havio ior r is is det deter- er-
emon on. .
ternal nal os osci cill llato ator r
well l as as th the e
(unlo lock cked) ed). .
nutes es, ,
Mete ters rs. . The These se
switc tchi hing ng to to
rver r roo rooms ms. .
Page ge 37 37 Pa