VHF+UHF frequency band including the following:
No Unit naming Description 1 VHF+UHF Dual Band In/out RF Port TX 1 Port RX 1 Port 3) Main Central Processor Unit (MCPU) MCPU can inquire and control state of modules that are installed in BIU. This unit can inquire and control state of four ODUs in total. Through communication, it also can inquire and control ROU that is connected with lower parts. In addition, the unit has RS-232C port for serial communication so that it can inquire and control state of devices through PC. On the front panel, it has communication LED indicator to check communication state with ROU. It also has ALM LED indicator to show whether a device gets faulty. For access to upper network, it has a port to insert Ethernet port and GSM modem in it. Figure 4.5 MCPU Outer Look In the Main Central Processor Unit, a lithium battery is installed for RTC (Real Time Control) function. CAUTION RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE DIPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS Confidential & Proprietary 31/136
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The equipment and accessories including inner lithium battery are to be disposed of safely after the life span of them and national regulation must be observed. Do not attempt to replace the lithium battery unless service personnel confirmation has first been obtained, to avoid any risk of explosion. 4) Main Power Supply Unit (MPSU) MPSU receives -48V of input and outputs +6V and +9V of DC power. On the front panel, this unit has an output test port and it also has DC ALM LED Indicator to show whether output gets faulty. Figure 4.6 MPSU Outer Look 4.1.5 Front/rear panels of BIU 1) Front panel Confidential & Proprietary 32/136 Item 1. MDBU LED 2. RF Monitor Port 3. Alarm LED & Reset 4. NMS(RS-232C port) Figure 4.7 BIU front panel Outer Look Description LED to show whether MDBU is installed and gets faulty 20Db Coupling compared with TX Input Level 20Db Coupling compared with RX Output Level Communication state with devices, alarm status of the system and reset switch RS-232C port for communication and diagnosis of devices through PC/laptop Ethernet port for upper network 5. NMS(Ethernet port) This equipment is indoor use and all the communication wirings are limited to inside of the building 6. Pwr Test Port & ALM Output DC power test port and ALM LED to show abnormal state, if any 7. Power switch Power ON/OFF switch Confidential & Proprietary 33/136 2) Rear panel Item 1. External ALM Port 2. GSM Modem Port 3. V/UHF I/O Port 4. ODU I/O Port 5. ODU signal Port 6. BTS/BDA I/O Port 7. GND Port 8. DC Input Port Figure 4.8 Rear panel Outer Look Description Input/output terminal for dry contact GSM Modem terminal for upper network (Optional) RF signal interface terminal of VHF&UHF RF signal interface terminal for ODU Power and signal interface terminal for ODU Input/output interface terminal of BTS/BDA System ground terminal Input terminal for DC -48V Confidential & Proprietary 34/136 4.2 ODU (Optic distribution Unit) ODU receives TX RF signals from upper BIU and converts them into optical signals. The optical signals are sent to ROU through optical cables. This unit converts optical signals from ROU into RF signals and sends the converted signals to BIU. For each shelf of the ODU, up to two DOUs (Donor Optic Unit) can be installed in it. One DOU is supported with four optical ports. Therefore, one ODU can be connected with eight ROUs. Up to four ODUs can be connected with BIU. Figure 4.9 ODU Outer Look Spec. 4.2.1 Specifications of ODU Item Size Weight Power consumption 482.6(19) x 43.6(1U) x 450 5.7 Kg 27 W Remark Mm Full Load Confidential & Proprietary 35/136 4.2.2 Block Diagram of ODU 4.2.3 ODU parts Figure 4.10 ODU Inner Look Confidential & Proprietary 36/136 No. Unit Description DOU Convert TX RF signals into optical signals;
Convert RX optical signals into RF signals;
Provide up to four optical ports per DOU 2Way Divider Divide TX RF signals into two;
Combine two RX RF signals into one Distribution Unit Distribute power and signals to DOU 19 rack, 1U 1 DOU 2W DU Shelf 2 3 4 5 Remark Max 2ea Accessories 15PIN DSUB, Male to female 1pcs RF Coaxial Cable Assembly 2pcs 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 Confidential & Proprietary 37/136 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 4.2.5 Front/rear panels of ODU 1) Front panel Figure 4.13 ODU front panel Outer Look Description Item 1,2 LED indicator to check DOU module state to see if it is abnormal 2) Rear panel Confidential & Proprietary 38/136 Figure 4.14 ODU Rear panel Outer Look Description SC/APC optical connector terminal; use one optical cable per ROU. Terminal to deliver power and state values RX RF signal interface terminal TX RF signal interface terminal Item 1. Optic Port 2. DC I/O Port 3. RX RF Port 4. TX RF Port 4.2.6 Interface with BIU Figure 4.15 Interface between BIU 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. Confidential & Proprietary 39/136 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. 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. Confidential & Proprietary 40/136 4.3.1 Specifications of OEU Figure 4.16 OEU Outer Look Item Size Weight Spec. 482.6(19) x 88.1(2U) x 450 9.3 Kg 48 W Power consumption 4.3.2 Block Diagram of OEU Confidential & Proprietary 41/136 Remark mm Full Load 4.3.3 OEU parts Figure 4.17 OEU Inner Look No. Unit Description 1 DOU 2 EWDM 3 ECPU 4 EPSU 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 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 Expansion Central Processor Unit Control and monitoring system status Control and monitoring with RS232 Relay state values of ROU to BIU Expansion Power Supply Unit Input power: DC -48V, Output power: 9V, 6V Confidential & Proprietary 42/136 Remark Max 2ea 5 6 ERFM Shelf Expansion Radio Frequency Module Regenerate TX signals and signals;
Regenerate RX signals and receive FSK modem signals 19 rack, 2U transmit FSK modem 4.3.4 Function by unit 1) Donor Optic Unit (DOU) DOU is the same as the module used for ODU. 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. Confidential & Proprietary 43/136 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 communication state with upper BIU and lower ROU. It also has ALM LED indicator to show if a device gets faulty. 4) Expansion Radio Frequency Module(ERFM) Figure 4.20 ECPU Outer Look Confidential & Proprietary 44/136 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. Figure 4.22 ERFM Outer Look Confidential & Proprietary 45/136