NuPower
TM
L60T01
User
Manual
Rev
1.1
7
3
SETUP AND OPERATION
This
section
provides
specific
details
for
proper
operation
of
the
NuPower
L60T01
module.
Following
these
guidelines
will
prevent
damage
to
the
power
amplifier
or
external
equipment.
3.1
POWER SUPPLY REQUIREMENTS
To
operate
the
NuPower
L60T01,
ensure
that
the
power
supply
has
adequate
overhead
to
source
the
current
demand
of
the
RF
power
amplifier.
The
power
supply
source
must
provide
a
typical
voltage
of
+28
VDC
with
greater
than
5
amps
capability.
3.2
CONNECTING A PROPER LOAD TO THE ANTENNA TERMINAL
To
prevent
damage
to
the
PA,
the
antenna
terminal
must
be
terminated
into
a
50
Ω
load.
Examples
of
a
proper
load
include:
Directly
connecting
to
an
antenna
specified
for
the
frequency
range
(960
MHz
to
1390
MHz).
Connecting
to
an
inappropriate
antenna
may
result
in
damage
to
the
PA
module.
Connecting
to
a
proper
antenna
through
a
50
Ω
transmission
line
or
coaxial
cable.
Avoid
using
damaged
cables
or
corroded
connectors
while
attaching
the
unit
to
an
antenna.
Terminating
the
antenna
terminal
into
a
50
Ω
power
attenuator
with
minimum
20
dB
attenuation.
Connecting
to
a
load
capable
of
dissipating
the
RF
power
from
the
PA
module.
Loads
capable
of
handling
50
Watts
(min)
are
recommended.
3.3
POWERING
‐
UP THE NUPOWER L60T01
The
NuPower
L60T01
must
be
terminated
to
a
proper
load
before
power
is
applied.
Refer
to
Section
3.2
for
the
specifications
of
the
proper
load.
After
the
PA
is
properly
terminated,
the
interface
cable
can
be
connected
to
the
unit
and
power
can
be
applied.
The
PA
is
now
ready
for
operation.
3.4
TRANSMIT TURN
‐
ON TIME
Caution:
Do
not
apply
transmit
data
until
the
PA
module
is
at
full
power.
This
will
prevent
loss
of
data
at
the
beginning
of
a
message.
The
NuPower
L60T01
is
at
full
power
approximately
1
µS
after
the
RF
Enable
line
goes
low
(ground).
Therefore,
transmit
data
can
be
applied
to
the
input
after
1
µS
without
loss
of
data.
3.5
RF OUTPUT POWER VS. SUPPLY VOLTAGE
The
NuPower
L60T01
was
designed
for
+28
VDC
operation.
