SOLiD 150V450U RDU MODULE(VHF/UHF) User Manual

SOLiD, Inc. RDU MODULE(VHF/UHF)

unsers manual-02

Confidential & Proprietary 33/99 4.2.3 ODU parts Figure 4.10 – ODU Inner Look No. Unit Description Remark1 DOU DOU Convert TX RF signals into optical signals; Convert RX optical signals into RF signals; Provide up to four optical ports per DOU Max 2ea2 2W 2Way Divider Divide TX RF signals into two; Combine two RX RF signals into one 3 DU Distribution Unit Distribute power and signals to DOU4 Shelf 19” rack, 1U 5 Accessories 15PIN DSUB, Male to female 1pcs RF Coaxial Cable Assembly 2pcs
Confidential & Proprietary 34/99 4.2.4 Function by unit 1) Donor Optic Unit (DOU) DOU makes electronic-optical conversion of TX signals and makes optical-electronic conversion of RX signals. With an optic splitter in it, this unit divides optical signals from Laser Diode into four and then distributes them to each optical port. With a total of four Photo Diodes in RX, DOU makes optical-electronic conversion of signals received from each optical port. In addition, the unit is equipped with ATT for optical compensation made in case of optical cable loss. With internal WDM, it uses only one optical cable to be connected with ROU. Figure 4.11 – MDBU Outer Look 2) 2Way Divider (2W) 2W is equipped with two 2-way splitters in a one-module form and the splitters work for TX/RX signals, respectively. Designed in broadband type, the divider combines and divides 2GHz or higher of signals from FSK modem signals. Figure 4.12 – 2Way Divider Outer Look
Confidential & Proprietary 35/99 4.2.5 Front/rear panels of MHU 1) Front panel Figure 4.13 – BIU front panel Outer Look Item Description 1,2 LED indicator to check DOU module state to see if it is abnormal 2) Rear panel Figure 4.14 – Rear panel Outer Look Item Description 1. Optic Port SC/APC optical connector terminal; use one optical cable per ROU. 2. DC I/O Port Terminal to deliver power and state values 3. RX RF Port RX RF signal interface terminal 4. TX RF Port TX RF signal interface terminal
Confidential & Proprietary 36/99 4.2.6 Interface with BIU Figure 4.15 – Interface between MHU and ODU On the top of BIU, up to four ODUs can be stacked. In this case, it is recommended to stack the units at least 1U of an interval between BIU, for heat from BIU may climb up to ODU, which may cause flame. As seen in the figure below, connect the coaxial cable for TX and another coaxial cable for RX with corresponding ports at the rear of BIU. For power supply and communication, connect 15Pin D-Sub Connector cable with a corresponding port.
Confidential & Proprietary 37/99 4.3 OEU (Optic Expansion Unit) OEU is mainly used to remotely deliver signals for Campus clusters. At the upper part, this unit combines with ODU and receives TX optical signals to convert them into RF signals. Then, it regenerates the signals to secure S/N feature and converts them into optical signals. The signals are sent to ROU through optical cables. When it receives RX optical signals from ROU, the unit converts them into RF signals to regenerate the signals and then converts them into optical signals to send them to ODU. In OEU, one shelf can be equipped with up to two DOUs. The DOU is the same as the module used for ODU. Up to two OEUs can be connected with ODU. Figure 4.16 – OEU Outer Look
Confidential & Proprietary 38/99 4.3.1 Specifications of OEU Item Spec. Remark Size 482.6(19”) x 88.1(2U) x 450 mm Weight 9.3 Kg Power consumption 48 W Full Load 4.3.2 Block Diagram of OEU 4.3.3 OEU parts
Confidential & Proprietary 39/99 Figure 4.17 – OEU Inner Look No. Unit Description Remark1 DOU Donor Optic Unit Convert TX RF signals into optical signals; Convert RX optical signals into RF signals; Provide up to four optical ports per DOU Max 2ea2 EWDM Expansion Wavelength Division Multiplexer Convert TX optical signals into RF signals; Convert RX RF signals into optical signals; Compensate for optical cable loss with ODU 3 ECPU Expansion Central Processor Unit Control and monitoring system status Control and monitoring with RS232 Relay state values of ROU to BIU4 EPSU Expansion Power Supply Unit Input power: DC -48V, Output power: 9V, 6V5 ERFM Expansion Radio Frequency Module Regenerate TX signals and transmit FSK modem signals; Regenerate RX signals and receive FSK modem signals6 Shelf 19” rack, 2U 4.3.4 Function by unit 1) Donor Optic Unit (DOU) DOU is the same as the module used for ODU.
Confidential & Proprietary 40/99 Figure 4.18 – MDBU Outer Look 2) Expansion Wavelength Division Multiplexer(EWDM) EWDM module makes optical-electronic conversion of TX signals and makes electronic-optical conversion of RX signals. With an FSK modem in it, this multiplexer communicates with BIU. It also has ATT for optical compensation to compensate for optical cable loss between ODUs. Furthermore, it has internal WDM, and so, it needs only one optical cable to work with ROU. Figure 4.19 – EWDM Outer Look 3) Expansion Central Processor Unit(ECPU) ECPU can inquire and control state of modules to be installed into OEU. This unit communicates with upper BIU while communicating with lower ROU. It also acts as communication bridge between BIU and ROU. In addition, the unit has RS-232C port for serial communication, which enables inquiry and control of devices thorugh PC. At the front panel, communication LED indicator indicates
Confidential & Proprietary 41/99 communication state with upper BIU and lower ROU. It also has ALM LED indicator to show if a device gets faulty. Figure 4.20 – ECPU Outer Look 4) Expansion Radio Frequency Module(ERFM) ERFM reconstructs Signal to Noise degraded by optical modules. With an internal FSK modem, this module communicates with ROU. Figure 4.21 – ERFM Outer Look 5) Expansion Power Supply Unit(EPSU) As DC/DC Converter, EPSU receives -48V of input and provides +9V and +6V of DC power required for OEU.
Confidential & Proprietary 42/99 Figure 4.22 – ERFM Outer Look

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