Figure 4.14 – ODU O Rear pa anel Outer Look L Item Descrip ption 1. Optic Port SC/APC opttical connector terminal; use u one opticcal cable perr ROU. 2. DC I/O Port Terminal to deliver d powe er and state values v 3. RX RF Port RX RF signa al interface te erminal 4. TX T RF Port TX RF signa al interface te erminal 4.2.6 6 Interface with BIU Figurre 4.15 – Inte erface betwe een BIU and d ODU he top of BIU U, up to four ODUs O can be e stacked.
As se een in the fig gure below, connect c the coaxial cable for TX and d another coaxial cable for f RX with correspondin ng ports at the rear of BIU. For po ower supply and commu unication, co onnect 15Pin n D-Sub Con nnector cable e with a corre esponding po ort. 4.3 OEU (Op ptic Expansion Unit)) OEU is mainly ussed to remote ely deliver signals for Ca ampus cluste ers. At the up pper part, this unit comb bines with ODU and rece eives TX optical signals to convert them t into RF F signals.
Figure 4.16 – OEU Outer O Look 4.3.1 1 Specifica ations of OE EU Item Spec. Remark Size 482.6 6(19”) x 88.1(2U) x 450 mm Weightt 9.3 Kg g Po ower consum mption 48 W 4.3.
.3.3 3 OEU parts Figure 4..17 – OEU In nner Look No o.
Ex xpansion Ra adio Freque ency Module e 5 ERFM M Re egenerate TX T signals and transsmit FSK m modem sig gnals; Re egenerate RX R signals an nd receive FS SK modem ssignals 6 Shelf 19 9” rack, 2U 4.3.4 4 Function by unit 1 1) Donor Optic O Unit (D DOU) DOU is the same as the modu ule used for ODU. Figure 4.
Figure 4.19 – EWDM Outer O Look 3) Ex xpansion Ce entral Processor Unit(ECPU) ECPU U can inqu uire and co ontrol state of modules s to be insstalled into OEU. This s unit comm municates with w upper BIU while communicatting with lo ower ROU. It also ac cts as comm munication bridge betwee en BIU and ROU. R In ad ddition, the unit u has RS-232C port for serial co ommunication, which en nables inquirry and contrrol of device es thorugh PC.
4) Ex xpansion Ra adio Frequen ncy Module(ERFM) ERFM M reconstruccts Signal to Noise degra aded by optic cal modules. With an inte ernal FSK mo odem, this module m comm municates wiith ROU. Figure 4.2 21 – ERFM Outer O Look 5) Ex xpansion Po ower Supply y Unit(EPSU) As DC/DC D Conve erter, EPSU receives -48V of input and provide es +9V and +6V of DC power p required for OEU. Figure 4.