NuPower
Xtender™
C10RX03
User
Manual
Rev
‐
8
4.4
OVER TEMPERATURE FLAG
This
signal
is
an
output
to
indicate
an
over
‐
temperature
condition
in
the
NuPower
Xtender
C10RX03.
A
logic
high
(+3.3
VDC
or
+5
VDC,
factory
set)
indicates
normal
operation,
while
a
logic
low
(0
VDC)
indicates
an
over
‐
temperature
condition.
The
Xtender
C10RX03
incorporates
internal
logic
circuitry
that
turns
off
the
DC
bias
to
the
RF
transistors.
This
unit
also
incorporates
a
temperature
back
off
feature,
where
it
will
reduce
power
initially
to
generate
less
heat
and
reduce
the
risk
of
damage
before
it
finally
reaches
the
trip
point.
Caution:
The
amplifier
should
be
shut
down
and
allowed
to
cool
off
when
the
over
‐
temperature
flag
is
set
low
to
avoid
damage
to
the
module.
4.5
TRANSMIT/RECEIVE (T/R) CONTROL
The
Xtender
C10RX03
is
configured
for
autosense
transmit/receive
(T/R)
switching.
The
module
switches
to
transmit
with
an
RF
input
greater
than
~+15
dBm,
and
switches
to
receive
when
the
RF
input
is
below
~0
dBm.
The
T/R
status
can
be
monitored
on
this
line:
logic
low
(0
VDC)
=
Transmit,
logic
high
(+3.3
VDC
or
+5
VDC,
factory
set)
=
Receive.
