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No Slide TitlePASOLINK V4
PASOLINK+
PDH
ADVANCED TECHNOLOGIES AND SUPERB PERFORMANCE
MIC, MMIC, HIC and VLSI all solid state circuitry from data input to RF input
Single chip modulator/ demodulator (Full digital)
Square-root Nyquist Roll-off shaping filter
High reliability
Multi-Level Coding Modulation (MLCM) used to ensure better error performance
Forward Error Correction (FEC) with Reed Solomon coding.
Allows smaller antennas and reducing system cost
FREQUENCY AGILITY AND EASY TUNING
Field tunable local oscillators (Synthesizer)
Changing RF point frequency without changing modules or measuring equipment
CONFORMITY WITH ITU-R, ITU-T AND ETSI STANDARDS
With PASOLINK PDH (QPSK) and PASOLINK PLUS SDH (32QAM )
PASOLINK PLUS INTRODUCTION - STM1
Different mounting methods for IDU, ODU and Antenna
Easy antenna pointing adjustments (RX level monitor point in ODU)
TX POWER CONTROL
SYSTEM FLEXIBILITY
(1+1) Hot standby or Twin path
Space and frequency diversity
Manual Transmit Power Control (MTPC)
PASOLINK PLUS INTRODUCTION - STM1
Full front panel access for all cabling and user interfaces
IF, Near End Base-Band and Far End Base-band Loop back facilities
Remote monitoring of ODU operating condition from IDU
OW calling facility between IDU - ODU, IDU – IDU and ODU-ODU
Local and remote supervision function on IDU
MULTIPLE SERVICE CHANNELS
Engineering Order Wire (OW)
Digital Service Channels - Two
Analog Service Channels- Two
wayside : 2.048/1.544 Mbps ,one channel (option for 32 QAM /128QAM Enhanced Ver. )
Complies with ETS 300385 Class B
ELECTRO MAGNETIC COMPATIBILITY (EMC)
10 Base – T : One channel optional
NMS Service Channel for Pasolink Monitoring
Cluster ALM
User friendly operation
Uses Windows NT/2000 to ensure easy operation and maintainability
Remote access and control of any PASOLINK Terminal in the network
Link oriented monitor and control ( both side of a microwave link)
Multi level security
Real-time monitor of Network Elements (NE)
SNMP Interface (Option)
Link oriented monitor and control
Uses Windows XP/2000/NT/98/95 with mobile PC
PASOLINK PLUS INTRODUCTION - STM1
2- Outdoor unit (ODU) ( Transmit – Receive unit)
3- IF cable and connectors ( To connect the IDU & ODU)
4- Antenna on the required microwave band
5- Hybrid ( coupler ) in case of 1+1 one antenna configuration
6- RF cable ( If the ODU is not direct mounted to the antenna)
MODEM
TX/RX
IF
RF
IDU
Modulator-Demodulator (Indoor Unit) (IDU)) and TRP-( )G-1AA
Transmitter-Receiver (Outdoor Unit) (ODU)), Hybrid and the antenna
The MDP-150MB5T-3 is used for 32 QAM system and the MDP-150MB7T-1 for 128 QAM system.
NECITR-YTC ART-FEB/04-01
PASOLINK PLUS INTRODUCTION - STM1
ODU – IDU CONNECTOR ( N-type connector)
OW/RX LEV CONNECTOR
PASOLINK PLUS INTRODUCTION - STM1
ODU sub band should be the same at both ends of the same hop
ODU Polarization Should be the same at both ends of the same hop
ODU should be high band at one end and low band at the opposite end of the same hop
1023.bin
IFL - IF IN/OUT N- type CONNECTOR (COAXIAL)
RX LEV MON – OW CONNECTOR
PASOLINK PLUS INTRODUCTION - STM1
IDU
B- Protected system (1+1) hot standby Single antenna configuration
Modem-1
Switch
Modem-2
ODU-1
ODU-2
H
Modem-1
Switch
Modem-2
ODU-1
ODU-2
H
TX
TX
RX
RX
TX/RX
TX/RX
The system consists of the following in site bases :-
One (1+0) IDU with one modulation / demodulation channel
One ODU
One Antenna
Hot standby system (1+1)
The system consists of the following in site bases :-
one IDU (1+1) with 2 two modulation / demodulation module
Two ODU working in the same spot frequency
One antenna with Hybrid or two antennas
In each side one ODU only is sending TX power and both ODU receiving the RX
Only one system is selected to carry the traffic and the other system is standby
TX & RX Switching is available Manually and automatically to control the switch over function
TX & RX Switching over are not effecting the traffic .
NECITR-YTC ART-FEB/04-01
System Configuration
C- Protected system (1+1) hot standby –Space diversity Double antenna configuration
D- Protected system (1+1) Twin path –Frequency diversity
Modem-1
Switch
Modem-2
ODU-1
ODU-2
Modem-1
Switch
Modem-2
ODU-1
ODU-2
TX
RX
TX/RX
TX/RX
The system consists of the following in site bases :-
one IDU (1+1) with 2 two modulation / demodulation module
Two ODU working in the Deferent spot frequency
two antennas
In each side both ODU is sending TX power and both ODU receiving the RX
Only one system is selected to carry the traffic and the other system is standby
RX Switching is available Manually and automatically to control the switch over function
Switching over function is not effecting the traffic
NECITR-YTC ART-FEB/04-01
ODU – PERFORMANCE
+25
16.5
16.5
16.5
15.0
15
14.0
10.5
-68.0
-67.0
-67.0
-67.5
-67.5
-67.5
-67.0
-66.0
-69.0
-68.0
-68.0
-68.5
-68.5
-68.5
-68.0
-67.0
93.0
83.5
83.5
84.0
82.5
82.5
81.0
76.5
94.0
84.5
84.5
85.0
83.5
83.5
82.0
77.5
PASOLINK PLUS INTRODUCTION - STM1
Tx Power Guaranteed +/-2
(1+1) Hot standby configuration with NEC branching circuit, additional loss of 7 dB typical will be considered
NECITR-YTC ART-FEB/04-01
27.5 ( 28 )
Frequency stability
128 QAM: -20 to 0 dB in 1 dB steps
Tuning Bandwidth
Center Tuned
Up to 50 MHz Up to 370 MHz (Depends on TX - RX spacing) Depends on T-R spacing
Ambient Temperature Range
-33OC to + 50OC
Power Supply (±48 V )
Typical Power Consumption
(1+0) system : 6-8 GHz – 65W, 11-38 GHz – 55W , (1+1) system : 6-8 GHz – 130W, 11-38 GHz – 110W
PASOLINK PLUS INTRODUCTION - STM1
For more details on the system performance parameter please refer to chapter 2.2 in the paso+ training book
NECITR-YTC ART-FEB/04-01
IDU Performance
Data Interface
PASOLINK PLUS INTRODUCTION - STM1
For more details on the system performance parameter please refer to chapter 2.2 in the paso+ training book
NECITR-YTC ART-FEB/04-01
STM-1 PERFORMANCE
STM-1 electrical Type
ITU – T G.703 155.520 Mbit/s (CMI), 1 VP-P 75 ohms unbalanced
STM-1 Optical Type
ITU – T G.957: S-1.1 155.520 Mbit/s (NRZ), (Intra Office) wave length 1310 nm,
STM-1 Optical Type ( Mono Fiber)
155.520 Mbit/s, (NRZ), TX wave length : A:1310 nm , B: 1550 nm RX wave length : A:1550 nm, B: 1310 nm Mean optical output power: -7 dBm Minimum Receive overload power : -3 dBm Minimum Receive Sensitivity : -23 dBm
Wayside Interface (WS) (Option) Not available on 128 QAM.
1 Channel 1.544 Mbps 2.048 Mbps 3.0VO-P (100ohms bal) 2.37VO-P(75ohms unbal) 3.0VO-P(120ohms bal) B8ZS or AMI HDB3
WS OPTION IS ALSO AVAILABLE ON STM-1, 128 QAM (ENHANCED VERSION)
LAN Interface (option)
64Kbps (WS Rate in Enhanced Version)
Digital Service Channel (DSC)
2 Channels , (V11 contra / co-directional) selectable, 64 Kbps, 100 ohms
Voice Frequency Service Channel (VF)
2 Channels, 4 wire, (0.3 to 4KHz) -6 dBm (nominal), 600 ohms balanced
Housekeeping Alarms / Control
Input (Alarms) 6 photo coupler Output (Control) 4 Form-C dry contact relays
IDU – ODU connection (IFL)
Single coaxial cable , 50ohms 300m (8D-FB type cable), 350m (10D-FB type cable), 450m (12D-FB type cable)
PASOLINK PLUS INTRODUCTION - STM1
FREQUENCY
IMPEDANCE
PASOLINK PLUS INTRODUCTION - STM1
ODU INTERFACE
150 M INTFC / OPTICAL INTFC/ (10/100BASE-T, TWO PORTS)
CONTROL (CTRL)
1-ODU INTERFACE
PERFORM THE MULTIPLEXING / DEMULTIPLEXING OF THE TX AND RX SIGNALS BETWEEN THE IDU AND ODU. ALSO THE ODU INTERFACE INSERT THE DC POWER TO THE ODU AND THE CONTROL (SV) SIGNALS AS WELL AS THE OW SIGNALS.
ODU INTFC COMPENSATE FOR THE TX SIGNAL LOSS DEPENDING ON THE IF CABLE LENGTH AS WELL AS AUTOMATIC GAIN CONTROL OF THE RX SIGNAL
2- 32 /128 QAM MODEM
32/128 QUADRATURE AMPLITUDE MODULATION (QAM) MODULATOR /DEMODULATOR
ERROR CORRECTION OF BURST ERROR USING REED-SOLOMON ENCODING/DECODING
DATA STREAMS CONVERSION DEPENDING ON THE MODULATION SCHEME
SCRAMBLING/DE SCRAMBLING
RFCOH MULTIPLEXING/DEMULTIPLEXING
STM-1 SIGNAL INTERFACE
4- CONTROL
PERFORMING PERFORMANCE MONITORING
LCT/ PNMT TERMINAL INTERFACE
INTERFACE OF 2048/1544 WAYSIDE SIGNAL
6- LAN CARD INTFC (optional)
ETHERNET INTERFACE (10 BASE-T) CARD WITH BRIDGE FUNCTION ( CAN BE USED INSTEAD OF WAY SIDE INTERFACE
7- POWER SUPPLY
NOMINAL POWER SUPPLY VOLTAGE IS ±48 VDC. (± 36 TO ± 60). 24 VDC POWER SUPPLY IS AVAILABLE AS AN OPTION.
POWER SUPPLY MODULE PROVIDES SEVERAL INTERNAL VOLTAGES (+7/+9/+10 / -15V) AND -43 VDC SUPPLY TO THE ODU.
NECITR-YTC ART-FEB/04-01
No 1 Power indicator
PASOLINK PLUS INTRODUCTION - STM1
FOR more details refer to chapter 3.1 ,3.2 in the Paso + training book
(CONTROLS, INDICATORS AND TEST JACKS)
NECITR-YTC ART-FEB/04-01
• ALM indicator:
Lights when :
• 150M INTFC/OPT INTFC module failure
• E-BER alarm is detected
• SD alarm is detected
-- LAN CARD Module:
• LINK indicator:
• Memory Over Flow indicator:
Lights when the memory of LAN CARD module overflows or a
collision condition occurs.
IF IN/OUT
STM-1 IN/OUT
PASOLINK PLUS INTRODUCTION - STM1
For the details of the interfaces and its pin assignment refer to the Paso+ training book chapter:-
2 -INTERFACE TERMINALS AND JACKS
NECITR-YTC ART-FEB/04-01
NEC PASOLINK PLUS SYSTEM HAS THE FOLLOWING ITU-T STANDARD INTERFACES
DIGITAL SIGNAL INTERFACES
Bit Rate: 155.520 Mbit/s ± 20ppm
Level: 1 Vp-p (nominal) (TX accepts 12.7dB cable loss at 78 MHz)
Code Format: CMI
Connector: IEC 169-13
Bit Rate: 155.520 Mbit/s ± 20ppm
Level: S-1.1 -8 to -15 dBm
Connector FC/PC
Wave Guide interface type :
Coaxial interface type : 6-8 GHz SMA Coaxial Connector ( N-type optional)
11 GHz :PDR100
Input/output Level: 2.37 Vo-p 75 Ohms/3.0 Vo-p/3.0 v
Connector D-Sub 9 pin
Wayside Traffic Transmission using RFCOH (option, 32QAM and 128QAM Enhanced Ver. only)
(75 Ω unbal 2Mbit/s)(120 Ω bal 2Mbit/s)(100 Ω bal1.544Mbit/s)
Code format HDB-3/ AMI or B8Zs
SOH Termination: RST
Service channels can be connected back-to-back at repeater stations.
Service channels 2 to 7 can be mapped to DSC1 to DSC4 in the RFCOH and E1, F1 and DCCr* bytes from the LCT or PNMT.
* DCCr available only in STM-1, 128QAM Enhance ver. only
OVERHEAD SERVICE CHANNELS
Standard
2
V-11
Digital
Standard
3
V-11
4
VF1
Analog
4 wire , (0.3 ~ 3.4 KHz ) -6 dBm nominal , 600 Ohms, Balanced
Standard
5
VF2
6
Digital
1.544 or 2.048 Mbps, RFCOH( 32 QAM /128 QAM Enhanced Ver. only) or 10 Base –T: 32 QAM use 2.048 RFCOH 128 QAM use DSC or RSOH(E1/F1) 64Kbps 128 QAM (Enhanced Ver) use 2.048 RFCOH
Option
7
LAN
Digital
Option
PASOLINK PLUS INTRODUCTION - STM1
E1 Regenerator Section orderwire channel (64 kbps) in the RSOH ( regeneration section over head of the SDH frame)
F1 User channel (64 kbps) in the RSOH ( regeneration section over head of the SDH frame)
DCCr Regenerator section Data Communication Channel (D1 TO D3), 192 kbps in the RSOH
(Available on STM-1, 128QAM Enhanced Ver.)
NECITR-YTC ART-FEB/04-01
No.2 CH Line IN
No.1 CH Line IN
No.2 CH Power Switch
No.1 CH Power Switch
Check that the LINE IN voltage is between +20 V to +60V (or -20 V to -72 V) with a digital multi-meter, before connecting the power connector to the IDU
Turn ON the Power switch on the IDU
Allow equipment to warm up for at least 30 minutes
STAR UP
SHUT DOWN
Turn OFF the power switch on the front of the IDU
The common unit is powered by both IDU1 and IDU 2
PASOLINK PLUS INTRODUCTION - STM1
NECITR-YTC ART-FEB/04-01
Protection switching is provided in (1+1) Twin Path and Hot Standby systems. The receive side protection switching is performed by a Hitless Switch in the 150 M INTFC / OPT INTFC or 10/100BASE-T INTFC module.
Priority 1: Manual switching Control
TX switching
Priority 2: Automatic switching control
For any alarm in the online equipment, traffic will be switched to the standby equipment automatically. TX and RX switchover are performed independently.
In the (1+1)HS system transmit switching is carried out by setting the standby ODU out put to off by Muting it. The data signal is transmitted in parallel to both CH1 and CH2.
RX switching
This apply to both HS and Twin Path configurations. When the Online RX CH fails or LOW BER Alarm is detected the ALM CONT circuit in the SW Board initiate a RX SW Control signal to switch to the standby CH provided it is in normal operating condition.
PROTECTION SWITCHING
Modulator Alarm
APC Alarm
TX Switching, either initiated manually or automatically may cause a short interruption of the data.
SWITCHING PRIORITY ( Provisioning)
1.Non-Priority
The switching condition used is non priority (non-homing). After switching the channel selected remains selected even if the alarmed channel is normalized
2. Priority No.1
When both channels are normal always selects CH1 as online. When CH1 is faulty automatically change to CH2 provided it is normal. When CH1 recovers return to CH1 automatically.
Low BER Alarm
RX SWITCHING (HITLESS) 10 NS TYPICALLY
The above period is from detection of an alarm to recovery on radio side. The period on MUX side is NOT considered.
The above period includes alarm detection time, system-switching margin when alarm occurs and system-switching time
NECITR-YTC ART-FEB/04-01
PROTECTION SYSTEMS
RX HITLESS 10 NS
For more detail about the protection switching refer to the Paso+ training book page 27 chapter :
2.5- Protection Switching
AUTOMATIC LASER SHUT DOWN FUNCTION
When the optical signal input to the main interface is lost, the ALS function automatically shuts the main interface output laser
ALS DELAY TIME
The ALS delay time can be set to 60 or 180 or 300 sec.
PASOLINK PLUS INTRODUCTION - STM1
ATPC setting parameters:-
3- ATPC RX threshold (Reference ) = -30 ~-70dB
- ATPC will start with the TX min. power
- When the RX level of the opposite site is decreased to be below the reference RX
- The ATPC Will start increasing the TX power up to TX max. in one dB steps until increasing the RX level of the opposite site to be over the reference level
- The ATPC will maintain the RX level within 5 dB over the reference level
IDU
ODU
RF
IDU
IF
Antenna
Antenna
TX
RX
TX
RX
PASOLINK PLUS INTRODUCTION - STM1
The automatic transmit power control (ATPC) function automatically varies the TX output power according to path conditions. In the 6 to 38 GHz band, fading exerts heavy influences on propagation, causing the receive signal level at the opposite station to vary. The ATPC function operates by controlling the transmit output power of the opposite station according to the variation of the received signal level at the local station. ATPC provides the following advantages:
• Improvement in up fading characteristics
• Improvement in residual BER characteristics
• Reduction of interference to intra system
• Reduction of interference to inter system
ATPC improves the BER characteristics under adverse changes in climatic conditions and reduces the possibility of interference. To implement ATPC, the receiving level (RX IN LEV) is detected by the receiver (RX) and passed on to the CPU in the CTRL circuit of the MODEM module. The CPU then determines whether the transmit output power needs to be controlled. This is based on the transmit output power, the minimum and maximum values of the output control range, and the receiving threshold level that were previously specified using the LCT or PNMT.
NECITR-YTC ART-FEB/04-01
Fading
Fading
High
Low
Shallow
Deep
Shallow
Deep
The ATPC Control transmits the information on the receiving level to the opposite station and controls the transmission level of its own station in accordance with the receiving level of the opposite station.
The ATPC Control can be used in several configurations:
ATPC - ATPC
MTPC - ATPC
ATPC - MTPC
PASOLINK PLUS INTRODUCTION - STM1
A control signal (POWER CONT), whose function is to maintain the RX signal level by lowering or raising the TX output power of the opposite station, is generated by the MODEM module through the CPU circuit. This control signal is based on the result of comparison between the current receiver input level and the preset receiving threshold level. Using RFCOH bits, this control signal is sent to the opposite station to control its transmit output power.
At the opposite station, this control signal is detected by the MODEM module. The MODEM module, in accordance with this control signal, produces a control that will either raise, lower or maintain the current TX output power.
The ATPC Control System of Pasolink+ transmits the information on the receiving level to the opposite station and controls the transmission level of its own station in accordance with the receiving level of the opposite station. Transmission level control can be used not only for setting the same operation (ATPC-ATPC) between own station and opposite station but also for operation in combination of stations with different operation (MTPC-ATPC, ATPC-MTPC) between own station and opposite station. The station set in MTPC mode is not controlled by the information from opposite station but is fixed in its transmitting output level.
Even if the station is set in the MTPC mode, the opposite station is likely to be set in the ATPC mode. Therefore, setting the RX Threshold (Receiving threshold level) is required for controlling the transmission level of the opposite station. Between the stations that are respectively set in the MTPC mode, however, the setting is disabled.
NECITR-YTC ART-FEB/04-01
LOOPBACK CONTROL
(a) STM-1 near-end loopback (STM-1 LB1) at the 150M INTFC/OPT INTFC module
(b) STM-1 far-end loopback (STM-1 LB2) at the 150M INTFC/OPT INTFC module from LCT
(c) IF loopback (IF-LB) at the MODEM module (Local only)
(d) STM-1 far-end loopback (STM-1 LB2) at the 150M INTFC/OPT INTFC Module from PNMT/PNMS
Note: While the IF loopback is in execution, monitoring of the opposite and the subsequent stations from the PNMS and PNMT are disabled.
(d)
Communication between Local IDU and Local ODU
Communication between Local IDU and Remote IDU
Communication between Local ODU and Remote IDU
Communication between Local ODU and Remote ODU
When back-to-back connection for order wire is provided, OW communication between different hops are possible.
Back-to-back connection
When the “Call” button on the IDU is pressed the buzzer sounds on the remote IDU and all the other IDUs connected through back-to back connections.
PASOLINK PLUS INTRODUCTION - STM1
Meter – Indicates the Receive level as a dc voltage
OW Indicator – Lights when the OW-ON/OFF switch is set to ON. Under this condition if the indicator is not lit replace the battery.
OW ON/OFF SW – when set to ON enables OW communication between the IDU and the ODU.
VOL control – Adjust the level of the OW RX signal.
Head set Jack – connects the headset for OW communication
RX LEV/OW IN connector – connect the OW/RX Lev monitor to the ODU using the provided coaxial cable
Battery – use 6F22(UB) / 9V battery
PASOLINK PLUS INTRODUCTION - STM1
340 MHz TX IF
140 MHz RX IF
TX EOW Signal
DC power -43V
Each of the input IF signal components are separated in the MPX using separation filters. DC voltage is supplied to the DC-DC CONV to produce regulated DC voltages required in the ODU.
The 10 MHz control signal which is ASK modulated is sent to the Control circuit, where the ODU controls like TX Power, RF Frequencies etc. are implemented. The Alarms in ODU are collected in the Control module and sent to the IDU using the ASK modulated 10 MHz signal.
Output IF signal consists of:
RX EOW signal
10MHz Alarm/Response
The RX EOW signal is separated in the MPX and superimposed with the RX Level from the CPU and sent to the EOW/RX LEV MON connector.
PASOLINK PLUS INTRODUCTION - STM1
PASOLINK PLUS INTRODUCTION - STM1
NECITR-YTC ART-FEB/04-01
POWER SUPPLY
The DC-DC Converter module on the IDU produces a regulated +5.3 and +3.6 V DC power from the +/- 48V / +/- 24 V DC input power for the component…