NuPower
TM
Mini
Multi
‐
Octave
PA
User
Manual
Rev
1.4
7
Table
5:
Power
Back
‐
off
Settings
Attenuation
Settings
Bit
1
Bit
2
Full
power
/
No
attenuation
N/C
N/C
‐
6
dB
(low)
GND
GND
‐
9
dB
(med)
GND
N/C
‐
12
dB
(high)
N/C
GND
4
HARDWARE
INTERFACE
The
RF
Input
connector
is
SMA
(female).
The
RF
Output
connector
is
SMA
(female).
The
pin
‐
out
definitions
for
the
9
pin
Micro
‐
D
socket
connector
are
provided
in
Table
6.
In
a
typical
installation,
the
PA
module
is
mated
to
a
host
controller
board
via
a
cable
harness.
The
RF
Out
SMA
connector
is
the
antenna
connection.
This
connection
should
always
be
loaded
into
50
Ω
,
otherwise
the
PA
could
be
damaged.
4.1
INTERFACE
CABLE
HARNESS
The
cable
harness
that
connects
the
host
controller
to
the
9
pin
Micro
‐
D
connector
of
the
NuPower
Mini
MOPA
is
made
up
of
9
wires.
Table
6:
NuPower
Mini
MOPA
Interface
Pin
‐
Out
Definitions
Pin
No.
Pin
Name
I/0
Description
1,
2
V
Supply
I
Primary
Power
(+28
VDC)
3,
4
GND
I
Signal
and
Power
Ground
5
RF
Enable
I
Transmit
Control
6
N.C.
‐
N/A
7
Bit
1
I
Power
Back
‐
off
mode,
see
Table
5
8
Temp
Flag
0
Over
‐
temp
Indicator
9
Bit
2
I
Power
Back
‐
off
mode,
see
Table
5
