Symmetricom SyncServer S100 User Manual page 94

Tasks Tasks
A A typi typical cal roof roof ante
GPS Rec GPS Recei eive vers rs ca can n be be su susc scept
ti tipa path th in inte terfe
th the e di direc rect t si sign gnal al. . Thi
degree deg rees s abo above ve the
le less ssen en mu mult ltip ipath
from from a a refl reflect
Us Use e th the e cr crit iter eria ia be belo low w to to se sele lect ct a a go good od ou outd tdoo oor r si site te fo for r th the e GP
The The bes best t loc
Unobs Unobstru
n n
L Low ow elec electro-m
n n
from from hig high-po
Conv Conveni enient
n n
Rea Reaso sona nabl ble e ac acce cess ss fo for r th the e ant
n n
Saf Safety ety fro
n n
Avoid: Avoid:
Overhan Overhanging
n n
Blocked ed vi views Block
n n
Stro Strong ng EMI
n n
Mul Multip tipath
n n
Mounting ng struc Mounti
GPS GPS an ante tenna
n n
Rad Radio io tow
n n
ference. ference.
Mu Must st be be ab able le to to wit
n n
If If a a go good od si site te is is not
99 997-0 7-0152 1520-0 0-03 3 Rev Rev. . A A ..........................................................................
antenna nna moun mounting ting. .
eptib ible le to to ref
rferen rence ce is is ca caus used ed by by ref refle lect cted ed si sign gnal als s tha
This s in inte terfe rferen rence ce is is mo
the hor horiz izon on. . The The he heig ight ht of of th the e ma
ath in inter terfer ferenc ence. e. The The an anten
ecting ing sur surfac face. e.
locati ations ons prov provide ide: :
truct cted ed vi views ews of of th the e sk sky y an and d ho horiz rizon.
tro-magne agnetic tic int interfe erferenc rence e (EMI)
h-power wer lin lines, es, tran transm smitt itting
ent acc access ess for for ins instal tallat lation
anten enna na ca cabl ble e to to rea
from m ha haza zards rds to to peo peopl ple e and
ging foliag foliage e
ews
EMI RFI RFI in inter terfer ferenc ence e
ath int interfe erferenc rence e (cau (caused sed by by adj
structures: tures:
nna ma mast sts, s, ve vent nt pi pipe pes, s, or or rai raili ling ngs s are
towers ers ma may y req requi uire re th the e se serv rvic ices es of of a a sp spec ecia iali list st, , an and d ma
withs hsta tand nd ve very ry hi high gh win
not av avai aila labl ble, e, co cons nsul ult t
..........................................................................
refle lect cted ed GPS GPS si sign gnal als s ca call lled ed mu
that t arri arrive ve at at th the e an anten
most st pro prono nounc unced ed at at lo low w el elev evat atio ion n an angl gles es fro
mast st/a /ante ntenn nna a ma
tenna na sh shou ould ld al also so be be at at le leas ast t thr
GPS S an ante tenn nna. a.
on.
(EMI) and and radi radio o freq frequenc uency y int interfer
ing ant antenna ennas, s, and and powerf powerful ul ele
ion and and mai mainten ntenanc ance. e.
reach ch the the Syn SyncSe
and eq equi uipm pment ent. .
adjace acent nt stru structu ctures res that that refl
are us usua uall lly y sa sati tisf sfac actor
winds ds. .
Op Operati erating in ng in "Wind "Window ow Mode
mult ltip ipath ath si sign gnal als. s. Mu Mul- l-
tenna na ou out t of of ph phas ase e wit
from m 10 10 to to 20 20
may y be be ex exte tende nded d up upward ward to to
three ee to to si six x fe feet et (1- (1-2 2 m)
erferenc ence e (RFI) (RFI) - - away
electri ctrical cal equi equipme pment. nt.
cServ rver. er.
reflect ect GPS GPS sig signal nals) s)
tory. y.
may y be be su subj bjec ect t to to si signa gnal l in inte ter- r-
(o (on n pa page ge 84 84). ).
Mode" "
Page ge 81 81 Pa
with h
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away