Trango
Systems,
Inc
TL45
User
Manual
Rev
2.0r3
LT
‐
9037A
August
15,
2011
Page
38
RSSI
Command
and
Antenna
Alignment
Once
the
site
survey
is
completed,
you
are
ready
to
install
your
radios.
Typically
it
is
best
to
install
the
MU
first.
To
properly
align
the
radios,
use
the
built
‐
in
RSSI
tool
to
achieve
maximum
signal
strength.
1.
Ensure
MU
and
RU
are
in
Opmode
“ON.”
2.
Connect
to
the
RU.
3.
Login
and
type
the
command
rssi
.
As
you
read
the
RSSI,
move
the
antenna
in
the
horizontal
and
vertical
planes
until
the
maximum
RSSI
reading
is
achieved
4.
If
it
is
not
possible
to
receive
an
adequate
RSSI
reading,
it
may
be
necessary
to
reorient
the
MU
(up/down,
left/right),
to
increase
the
output
power
of
the
MU,
or
to
move
the
RU
to
a
location
with
better
line
‐
of
‐
sight
conditions
to
the
MU.
5.
Once
you
are
satisfied
with
the
RSSI
reading,
tighten
down
the
RU
in
the
optimum
position.
Example:
#> rssi
Press any key to stop.
0> MU
-75 dB
RU
-75 dB
Connected
1> MU
-75 dB
RU
-75 dB
Connected
2> MU
-73 dB
RU
-73 dB
Connected
3> MU
-72 dB
RU
-71 dB
Connected
4> MU
-70 dB
RU
-70 dB
Connected
5> MU
-70 dB
RU
-69 dB
Connected
6> MU
-69 dB
RU
-70 dB
Connected
7> MU
-70 dB
RU
-70 dB
Connected
8> MU
-70 dB
RU
-70 dB
Connected
9> MU
-67 dB
RU
-68 dB
Connected
10> MU
-67 dB
RU
-67 dB
Connected
Success.
Users
can
also
view
the
RSSI
LEDs
on
the
bottom
of
the
radio.
See
the
configuration
section
of
this
manual
for
more
information.
Setting
Maximum
RF
Power
for
Legal
Operation
in
the
U
‐
NII
Bands
(
‐
EXT
only)
Due
to
FCC
restrictions
the
professional
installer
must
manually
set
the
maximum
power
for
the
5.25
to
5.35
GHz
and
5.47
to
5.725
GHz
U
‐
NII
bands
based
upon
which
external
antenna
antenna
is
being
used
.
In
all
cases,
EIRP
cannot
exceed
+28
dBm.
Antenna
Gain
+
Radio
Max
Power
Setting
=
28
‐
Antenna
gain
+
cable
loss.
As
an
example,
if
the
radio
is
being
installed
with
a
34
dBi
antenna
with
a
1
dB
loss
cable,
then
the
radio
max
U
‐
NII
power
must
be
fixed
to
–5
dBm.
The
following
chart
provides
additional
details.
Antenna Gain
–cable loss
Maximum Allowed
U
‐
NII Tx
Power
26
+2
dBm
30
0
dBm
33
‐
5
dBm
