pixel <---- character <---- (uP or uC) <-------  LVDC electric pulse (copper wires) <-----  light pulse (OFC) <-------- electromagnetic wave (RF coax cable) <--------- radio signal incident at sector antenna







Radio signal incident at GSM sector antenna as EM wave
EM wave (RF coax cable)
Light pulse (OFC)
LVDC electric pulse (copper wires)
Bits (uP or uC)
Character
Pixel



Radio signal incident at GSM sector antenna as EM wave of a specific frequency^.
The antenna picks-up the frequency it has been designed for, and transmit that EM wave to RRU through a RF Co-axial cables (called as Feeders and Jumpers).
This EM wave is then converted* into optical domain and transmits the optical-pulses through Optical-Fiber Cable i.e. OFC into BMU (Baseband Main Unit; Ericsson's Baseband-5216) (fed with -48 DC Volts).
The BMU is connected to the core network via a wireless backhaul link (microwave parabolic-dish antenna) [BMU outputs the ]

Light pulse (OFC)
LVDC electric pulse (copper wires)
Bits (uP or uC)
Character
Pixel

Image result for microwave backhaul antenna



^ 824Mhz to 960MHz ; 1710MHz to 2180MHz ;
* RRU is fed with external Power from PDU to perform such actions.
* Each RRU has a block of optical port. each block has two optical ports. 1 for Tx and the other for Rx.
* Generally, Number of Sector = No. of RRUs to install
* BMU-5216 has 6 blocks of optical ports. hence, it can support 6 RRUs or 6 Sectors (A, B, C, D, E and F)

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