| 摘要 |
PURPOSE: An apparatus for supplying a power to a backboard in a radio port of a WLL is provided to prevent that entire voltages of signals in a G-bus are dropped when performing an IPC(Inter Processor Communication) by mounting a specific power supply board for supplying the power of the IPC and directly supplying the power supply voltage(VCC) with 5V. CONSTITUTION: A -48V and a -48V GND are supplied to a GPDA1(G-bus Power Daughter Assembly 1)(118) and a GPDA2(118), respectively. The GPDA1(118) and the GPDA2(118) convert the 48V and the -48V GND into the power supply voltage(VCC) with 5V in an internal DC/DC converter and supply the power supply voltage(VCC) to an E1RPC(E1 interface Radio Port Control unit)(111), an RCP(RP Control Processor Unit)(112), and an RDU(RP Reference Clock Distribution Unit)(113) through a backboard.
|
