ROLE-504820-051 CONTENTS 931020 5.8 GHz 15/28/80 MB PDH DIGITAL MICROWAVE RADIO SYSTEM M Lite L (PDH 140/11 SYSTEM) SECTION DESCRIPTION CONTENTS TITLE PAGE 1. GENERAL 1.4 2. SYSTEM DESCRIPTION Zi 2.1 System Configuration esvstssoosassasssocssassasassonsarnseons 2.1 22 System Performance 2-5 23 RE Channel Plan possess 24 Alarm and 2-48} oosanrsncossconassnaon 2.4 {f 2.4.1 Alarm Indication and Reporting 2.0 2.42 Performance Monitoring/Metering Data Reporting 2-13 2.43 Automatic Transmitter Power 2.43 2.
GENERAL 1. GENERAL This section provides descriptive information on the 5.8 GHz 15/28/45 MB digital microwave radio system for the geosynchronous digital hierarchy (PD. The 5.8 GHz 15/28/50 MB digital microwave radio system is designed to transmitting DD-1 or DD-3 level signals, It operates in the 5.8 GHz radio frequency band using the 32 QAM or 128 QAM Quadrature Amplitude Modulation {QAM) method and has a (transmission capacity of 8 x 1.544 1.544 MB, for 1 x DD-3 64 QAM is utilized.
OI-804820 SYSTEM DESCRIPTION 2. SYSTEM DESCRIPTION The system description outlines the system configuration, system performance, RF channel plan, alarm and control, protection switching, and power supply. 2.1 System Configuration The system consists of the Modulator-Modulator (MD, TramsmilterReceiver {(TRP) and the Antenna (see Fig. 2-1 to Fig 2-2). The MDP types are as follows: * MD P-1SMB5T-1A: Fixed bit rate type » MD P-28MBTT-1A: Fixed bit rate type » MD P-30MB6T-1B: Fixed bit rate type The 5.
SYSTEM DESCRIPTION 2.2 System Performance OI-804820 The system performance characteristics of the 10.5 GHz 15/28 MB digital microwave radio system are listed in Table 2-2. Tate 2-1 System Performance (Typical Value} A. Major Specification Transmission Signal Transmission Capacity Modulation Demodulation Forward Error Correction (FEC) Equalizer Data Interface Impedance 8 x DS1/16 x DS1 System 1x DS3 System Service Channel SEW « ° DSI & DS3 8 x 1.544 Bps (8 x DDS/ 16 % 1.544 Bps (16 x SUDSY/ 1x 44.
OI-504820 SYSTEM DESCRIPTION Table 2.1 System Performance (Typical Value} (Cont'd) TX Power Control TX Switching System RX Switching System Switching Range Delay Equalization Range Switching Criteria Loop back Function Performance Monitoring (* 1) Measurement Alarm Output Housekeeping Alarms (* 1) ATPC/MTPC Oto 23 dB {1 dB step) (8xDSI)0to step) (16 x DS1 & 1 x DDS) Mute output power of the reserve TRP (HS/HS) in split system.
SYSTEM DESCRIPTION OI-804820 Table 2-1 System Performance (Cont'd) (Typical Value) B. System Parameter for Split Type Rem Condition/Remarks Specification Transmission Capacities 8/16 x DSI 1 1 x DS3 Transmit Power 5.8 GHz +25 dBm Typical System Gain 5.8 GHz 105 dB 96.
OI-504820 SYSTEM DESCRIPTION Table 2-1 System Performance (Cont'd) (Typical Value) C. OVERALL MD P-TRP Interconnection Cable UF Line Cable {Type and Maximum Cable Length) Primary Voltage (Safety Extra-Low Voltage (SEL V)) Power Consumption (MDP + TRP) Dimension MDP TRP . 5.8GHz Weight MDP TRP * 5.
SYSTEM DESCRIPTION OI-504820 2.3 RF Channel Plan Radio frequencies for the N Lite L 5.8 GHz is as follows: ¢ FCC 10.5 GHz Band : 3725 Mhz to 5850 Mhz The actual TX frequency of the TRP should be within the TX radio frequency band of the RF CKT in the TRP and is entered using the local craft terminal (MULCT. The corresponding RX frequency is automatically set after the TX frequency is entered.
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OI-804820 SYSTEM DESCRIPTION 2.4.2 Performance Monitoring/Metering Data Reporting To monitor the transmission quality, the equipment is provided with the performance monitoring and the metering functions. The CTR module polls the different modules and gathers PM/Metering information. A “invalid” displayed in the PM results screen indicates that the value is illegal. A “MAIN” is displayed if the PM results are obtained while the equipment is in maintenance mode.
OI-804820 TRANSMITTING STATION SUBSYSTEM DESCRIPTION A functional block diagram of the ATP operation is shown in Fig, 2-6. ATP improves the BER characteristics under adverse changes in climatic conditions and reduces the possibility of interference. To implement ATP, the received level (RX LEV) is detected by the receiver (RX) and passed on tw the CPU on the CTR circuit of the MODEM module. The CPU then determines whether the transmit output power needs to be controlled.
OI-804820 SYSTEM DESCRIPTION The ATP Control System of the N Lite L transmits the information on the receiving level fo the opposite station and controls the transmission level of its local station in accordance with the receiving level of the opposite station.
OI-804820 SYSTEM DESCRIPTION 2.4.4 Loop back Control The loop back function is provided for checking the system quality during maintenance and/or to quickly isolate a fault location. The control is performed by the LCT, the PENMAN or the POMS. The following types of loop back are provided: » DSI near-end loop back (DS1 LB1) at the CTR. module ((a) in Fig. 2-7). + Main DS! far-end loop back (DS! LB2) at the CTR module ((b) in Fig. 2-7). + IF loop back (FT-LB) at the MODEM module ((c) in Fig. 2-7). Notes: 1.
SYSTEM DESCRIPTION ROISTERER 2.4.5 Network Management (Optional) (released after Jan., 2004) The Network Management System (NMS) configuration is shown in Fig. 2-8. The gasoline network management system (POMS) is connected to the POMS connector of the MDP located at the designated maintenance center while the gasoline network management terminal (PENMAN) is connected to the PENMAN connector on the MDP of remote stations.
OI-804820 SYSTEM DESCRIPTION 2.5 Protection Switching Protection switching is provided for the TX and RX sections in the Hot Standby (HS) system and is performed by automatic control and manual control, The TX protection switching is performed by the mute control on the No.1 and No.
SYSTEM DESCRIPTION OI-504820 In the automatic switching mode, No.1 channel can be given Priority or Non-priority. Under the priority mode, when switchover has been performed from No.l CH to No.2 CH caused by No.l CH alarm, reversal switchover is performed automatically from No.2 CH to No.1 CH when alarm condition of the No.t is restored. Under the Non-priority mode, the switchover is performed alternately from No.1 CH to No.
OI-504820 SYSTEM DESCRIPTION 2.6 Power Supply The power supply system block diagram is shown in Fig. 2-9. The DC-DC CON module on the MDP produces regulated +35.3 and +3.6 V DC power from V DC input power for the component modules in the MDP, Also, this module produces a regulated ~43 V DC power from the -48 V DC input power for the TRP. The power to the TRP is supplied through the coaxial cable which is also used for the IF and other signals.
R OI-S04820 INDOOR UNIT 3.1 Composition SUBSYSTEM DESCRIPTION 3. SUBSYSTEM DESCRIPTION Described herein are composition and functional operation of each module of the MDP and the TRP. The following equipment are composed of appropriate plug-in units as listed in Table 3-1. The component unit/modules are arranged on a shelf as shown in Fig, 3-1. Table 3-1 MDP Equipment Code No.
SUBSYSTEM DESCRIPTION OI-504820 ony ] INTER PE-ne QAM CON MODEM Ho (TOP LAYER/BOTTOM LAYER) 4 TOP VIEW FRONT | MAIN BOARD 1.5M INTACT (MEDIUM LAYER) TOP VIEW FRONT Notes: 1. Location numbers are referred to those in Table 3-1. 2. * For details, fever to Note 7 af Fig. 3-3 in Chapter 3. Fig.
OI-504820 SUBSYSTEM DESCRIPTION 3.2 Functional Operation A block and level diagram of the MDP is shown in Fig. 3-2. Functional operations of the TRP are described separately for the modulator section and demodulate section.
SUBSYSTEM DESCRIPTION R OI-S04820 PR. (oo Morrison ! MOUNT 0.1 ost DATA wip] INCLEMENT {gt QAM ou : PRINTOUT ¥ | Woofer [we | Rc [lel SMT BOW! Fon wl NE? NEZ Paris vir =m] crucify PMS LAN =f EOW | i motorway Y1esKe WUT OOU -to2 MODEM INTACT iF in Out VE v Out pr ln ¥ STR ALM i : : CLOISTRAL Thee MEN cru : BAKELITE ot i VILE EKE qin! Lands C Notes: 1. The recommended cable, 8D-FB, has 15 dB (at 140 dB fat 340 MHz} loss at the maxim length of 300 meters (1,000 feet). 2.
SUBSYSTEM DESCRIPTION 3.2.1 Modulator Section The DSI signals received from the terminal equipment enter the 1.5M INTACT module in the SW UNIT. The 1.5M INTACT extracts the clock component from the data signal. Then the code format of DSI signal is converted from BRAZOS or AMI into Non-Return-To-Zero (NRZ) with extracted clock signal and fed to the QAM MODEM module, In the QAM MODEM module, the data signal is speed-converted into radio frame format and time slots are made.
SUBSYSTEM DESCRIPTION OI-504820 3.3 Composition The component modules are arranged on the shelf as shown in Fig. 3-4. SYNTH INSIDE OF TRP Flg.
SUBSYSTEM DESCRIPTION 3.4 Functional Operation The block diagram of the TRP is shown in Fig. 3-5. Functional operations of the TRP are described separately for the transmitter section and receiver section, 3.4.1 Transmitter Section An alarm/control signal, Engineering Order wire (EOW) signal and DC component which are composed of the IF signal are separated through the multiplexer (MPX) circuit. The controllable signal, and EOW signal are applied to the CONT module.