User's Manual Part 2

Power Amplifier Module - 113 -
®
Affinity LBD-200C-N1 Transmitter
Product Manual
Power Supply Board
The Power Supply Board consists of input and output voltage monitoring, standby switching,
over-voltage protection, and current sensing. All functions of the Power Supply Board are
interfaced with the Microcontroller Board.
The Power Supply Board switches the Front-End 48V
DC Power Supply ON/OFF using a power
FET. After engaging the PA Module, the control board checks the input voltage and turns the
FET switch on. The microcontroller board will then detect the switched voltage. If the voltage
goes above or below the preset value, the microcontroller board will disable the standby switch.
The power supply distributes eight lines of power with current sensing. These lines are used for
current protection and are monitored by the microcontroller board.
Power Supply board
Power Supply Board Specifications
Parameter Specification
Primary Input Voltage 48VDC
Primary Input Voltage Range 48VDC +2.0V –1.0V
Primary Input Current 13A DC @ 32VDC +48DBM COFDM signal
Primary Input Current Range 13A DC @ 32VDC +48DBM COFDM signal
Output Power 70W maximum
Output Current Limit §2A above maximum @ 48 dBm COFDM signal
Efficiency §90%
Operating Temperature 0°C to 50°C