Installation and Operation Manual

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3) Remote Optic Moduel (R-Optic)
Remote Optic Module (R-Optic) converts optical signals into RF signals and RF back to optical. It also has
an internal attenuator (ATT) to compensate optical cable losses. The R-Optic has the two paths, one for
HMRU and other one for HARU.
Figure 4.7 – R-Optic Module
4) Remote Central Processor Unit (RCPU)
The Remote Central Processor Unit (RCPU) can monitor and control each module of HROU. This unit
receives and analyzes data from the R-Optic module and communicates status to the BIU. LED indicators
on the front panel show system status, letting you check any abnormality. Communication LED Indicators
also located on the front panel to show communication status with the BIU. A RESET button on the front
panel is available to restart the CPU. LED indicators on the front panel provides status for: Power (Green
= normal; Red = no power), Downlink (TX) signaling and Uplink (RX) signaling (Green = normal operation;
Red = link failure or power levels above/below reference levels), and Active Alarm conditions (Green = no
active alarms; Red = active alarm exists).
It provides three interface ports to communicate with the HARU. It also provides dry contact port, which
is a single output port and a single input port.
Figure 4.8 – Remote Central Processing Unit