NuPower
TM
LS75T01 User Manual
Rev -
4
HARDWARE INTERFACE
•
The RF Input connector is SMA (female).
•
The RF Output connector is SMA (female).
•
The pin-out definitions for the 15 pin Micro-D socket connector are provided in Table 5. In a
typical installation, the PA module is mated to a host controller board via a cable harness.
The RF Out SMA 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
LS75T01 is made up of 9 wires.
Table 5: NuPower LS75T01 Interface Pin-Out Definitions
Pin No.
Pin Name
I/0
Description
Pins 1-6
V Supply
I
Primary Power (+28 VDC)
Pins 9-14
GND
I
Signal and Power Ground
Pin 7* – Temp Flag 1
Pin 8 – Temp Flag 2
Temp Flag
O
Over-temp Indicator
(Low = temperature fault)
Pin 15
RF Enable
I
Transmit Control
*Do not connect the Temperature Flag to DC Power (+28 Volts input). The Temperature Flag can be used
to monitor thermal shutdown.
4.2
DC POWER
The nominal supply voltage for the NuPower LS75T01 is +28 VDC; The acceptable supply voltage range is
+27 to +32 VDC.
4.3
GROUND
The signal and power grounds are tied together in the PA module.
4.4
RF ENABLE
This signal is the logic control input that designates whether the unit is in transmit or standby mode. The
RF Enable line is pulled high internally placing the PA module in
standby
mode. If the pin is left floating
(i.e. not connected), the unit will default to
standby
mode.
