n
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The Hard
The
othe
other r Inpu
While e in in hol
Whil
n
n
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The Hard
The
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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
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