10/12/13
LMU-5000 Hardware & Installation Guide - PULS Wiki
https://puls.calamp.com/wiki/LMU-5000_Hardware_%26_Installation_Guide
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Examples of good and poor GPS antenna placements
Th
e
r
e
c
e
i
v
e
d
s
i
g
n
a
l
l
e
v
e
l
s
a
t
t
h
e
GPS
a
n
t
e
n
n
a
f
r
om
t
h
e
s
a
t
e
l
l
i
t
e
s
a
r
e
v
e
r
y
l
ow
i
n
powe
r
(
a
ppr
ox
i
ma
t
e
l
y
-
136
dBm)
,
s
o
a
n
y
bl
oc
ka
g
e
of
t
h
e
a
n
t
e
n
n
a
c
a
n
a
f
f
e
c
t
t
h
e
qu
a
l
i
t
y
of
t
h
e
l
oc
a
t
i
on
c
ompu
t
e
d
by
t
h
e
r
e
c
e
i
v
e
r
.
Ki
n
ks
or
t
i
g
h
t
kn
ot
s
i
n
t
h
e
a
n
t
e
n
n
a
c
a
bl
e
c
a
n
a
l
s
o
pr
e
v
e
n
t
t
h
e
GPS
r
e
c
e
i
v
e
r
f
r
om
ope
r
a
t
i
n
g
pr
ope
r
l
y
.
Wh
e
n
l
a
y
i
n
g
ou
t
t
h
e
a
n
t
e
n
n
a
c
a
bl
e
,
c
a
r
e
s
h
ou
l
d
be
t
a
ke
n
s
o
t
h
a
t
t
h
e
c
a
bl
e
i
s
n
ot
s
u
bj
e
c
t
e
d
t
o
c
r
u
s
h
i
n
g
or
s
t
r
a
i
n
.
Placement of Combination and Internal Antennas
Wh
e
n
de
a
l
i
n
g
wi
t
h
c
ombi
n
a
t
i
on
a
n
t
e
n
n
a
s
,
i
t
i
s
mor
e
i
mpor
t
a
n
t
t
o
c
on
s
i
de
r
e
d
GPS
pe
r
f
or
ma
n
c
e
ov
e
r
Comm
pe
r
f
or
ma
n
c
e
.
GPS
s
i
g
n
a
l
s
t
r
e
n
g
t
h
s
a
r
e
mu
c
h
l
owe
r
t
h
a
n
t
h
os
e
t
y
pi
c
a
l
l
y
s
e
e
n
by
c
e
l
l
u
l
a
r
n
e
t
wor
ks
s
u
ppor
t
e
d
by
t
h
e
LMU.
I
n
or
de
r
t
o
ma
x
i
mi
z
e
t
h
e
pe
r
f
or
ma
n
c
e
t
h
e
LMU
s
h
ou
l
d
h
a
v
e
a
c
l
e
a
r
v
i
e
w
of
t
h
e
s
ky
a
s
pos
s
i
bl
e
.
Wh
e
n
i
n
s
t
a
l
l
i
n
g
t
h
e
GPS
a
n
t
e
n
n
a
i
n
a
v
e
h
i
c
l
e
,
ma
ke
s
u
r
e
t
h
a
t
t
h
e
r
e
a
r
e
a
s
f
e
w
obs
t
r
u
c
t
i
on
s
a
s
pos
s
i
bl
e
c
l
os
e
t
o
t
h
e
LMU
t
h
a
t
mi
g
h
t
bl
oc
k
t
h
e
v
i
e
w
360°
t
o
t
h
e
h
or
i
z
on
.
As
wi
t
h
s
t
a
n
d-
a
l
on
e
GPS
a
n
t
e
n
n
a
s
,
n
ot
h
i
n
g
s
h
ou
l
d
n
ot
bl
oc
k
t
h
e
c
ombi
n
a
t
i
on
a
n
t
e
n
n
a
be
y
on
d
5°
a
bov
e
t
h
e
h
or
i
z
on
wi
t
h
t
h
e
be
s
t
l
oc
a
t
i
on
be
i
n
g
n
e
a
r
t
h
e
c
e
n
t
e
r
of
t
h
e
r
oof
.
For
mor
e
c
ov
e
r
t
i
n
s
t
a
l
l
s
,
di
r
e
c
t
l
y
u
n
de
r
t
h
e
f
r
on
t
or
r
e
a
r
-
wi
n
ds
h
i
e
l
ds
a
r
e
a
l
s
o
a
c
c
e
pt
a
bl
e
.
Examples of Good (Green), OK(Yellow) and Poor(Red) combo antenna
placements
