User's Manual

Corning Optical Communications User Manual I CMA-336-AEN I Page 13
1.1.3 Signal Path
In the downlink path, combined RF signals (from up to four supported services) from the radio interface unit (RIU) are
converted into optical signals by the OCH. The optical signals are then transmitted to the GX at the remote site via optical
fiber. The signals are filtered and amplified at the GX and transmitted through the service specific output ports to the
broadband antennas.
In the uplink path, GX converts the RF signals transmitted from the service antennas into optical signals. The signals are
transmitted via optical fiber to the OCH which then converts the optical signals back to RF signals.
The optical DL and UL signal are transmitted in a single optical fiber based on the wavelength division technology (WDM).
Figure 1-4. GX Functional Block Diagram