2002 NEC Corporation MTD-PL-028 141005 PASOLINK + 6-38 GHz 155 MB DIGITAL RADIO SYSTEM (1 + 0 / 1 + 1 SYSTEM) This document describes the current version of NEC standard equipment. If there is any conflict between this document and the System Description and/or the Compliance statement, the latter will supersede this document. The specifications or configuration contained in this document are subject to change without notice due to NEC's continuing design improvement. NEC Corporation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
2002 NEC Corporation MTD-PL-028141005
PASOLINK+
6-38 GHz 155 MB DIGITAL RADIO SYSTEM(1 + 0 / 1 + 1 SYSTEM)
This document describes the current version of NEC standard equipment. Ifthere is any conflict between this document and the System Description and/orthe Compliance statement, the latter will supersede this document.The specifications or configuration contained in this document are subject tochange without notice due to NEC's continuing design improvement.
NEC Corporation
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- i -
TABLE OF CONTENTSLIST OF ABBREVIATIONS........…...….…...............…...............…....…......………….….........ii
NEC’s new PASOLINK+ series; 6-38 GHz 155 Mbps Synchronous Digital Hierarchy (SDH)microwave radio systems are designed to transmit one synchronous transport module (STM-1, 155 Mbps). They operate at the 6-38 GHz radio frequency band using quadrature amplitudemodulation (32-QAM or 128-QAM), and have a transmission capacity of OC3 or STM-1. Inaddition to the PASOLINK+ systems for short distance links, NEC offers a complete productline of STM-1 radio systems that includes the 4, L6, 7, 8, 13 GHz 155 Mbps 128 QAM and 4,5, U6, 8, 11 GHz 155 Mbps 64 QAM systems for long distance use. For those systems,please refer to the other technical descriptions.
The PASOLINK+ radio systems are fully compatible with SDH Network Elements (NE). Thesystems consist of antennas, outdoor units (ODU), and indoor units (IDU). They areconnected through a coaxial cable for each radio channel. Available configurations are non-protection type (1 + 0) and protection type (1 + 1). The protection type is available for twin-path type and hot-standby type.
Regarding antenna configurations there are two types available. There is a one-antennasystem employing hybrid (HYB) RF combiner and divider, and a two-antenna system methodusing each antenna for two ODUs independently. The hybrid is the passive device thatcombines and divides the signals between two ODUs and an antenna. Therefore, the one-antenna system requires only a single antenna, however, additional loss between ODUs andantenna have to be considered. On the other hand, the two-antenna system has high systemgain as same as non-protection type.
STM-1 interface can be selected for electrical or optical. Therefore, PASOLINK+ systems areuseful in fiber optical transport system (FOTS). Additionally, Fast Ethernet interface can beselected for IP network.
The PASOLINK+ employs a full digital MODEM using enhanced signal processing techniquesand forward error correction (FEC). Moreover, the bit-error-rate characteristics againstreceiver input signals are excellent for applying FEC (32-QAM System: MLCM (multi-levelcode modulation) and RS (Reed Solomon method), 128-QAM System : QAM and RS).
The equipment can be installed easily and quickly using a PC (as Local Craft Terminal), andas a maintenance tool.
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 2 -
Type 1 Type 211-38 GHz 128 QAM/32 QAM type 6-8 GHz 128 QAM type(0.3m Diameter Antenna) (Low Loss Coaxial cable connection to Antenna)
Figure 1. Antenna and (1 + 0) ODU
Figure 2-1. Indoor Unit (IDU) 1 + 0 Configuration
Figure 2-2. Indoor Unit (IDU) 1 + 1 Configuration
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 3 -
2. FEATURES
2.1 Advanced Technologies and Superb Performance
Throughout the SDH radio system, NEC’s own advanced technologies are used. Intensiveuse of Microwave Integrated Circuits (MIC’s) and Hybrid IC’s (HIC’s) make the TRP durableand compact. Also, custom made large-scale integrated circuits (LSI’s) are applied. Forexample, a new digital MODEM is incorporated in a single LSI chip, specially developed byNEC for the radio equipment. Furthermore, low-power high-speed complementary metaloxide semiconductor (CMOS) LSI’s are extensively used, making the equipment morecompact and reducing the power consumption.
2.2 High System Gain
• Multi-Level Coding Modulation (MLCM) is applied to ensure a better error performance (32QAM System).
• Forward Error Correction (FEC) with Reed-Solomon coding is equipped to improve BERperformance.
2.3 Easy and Quick Installation
• Interconnection: Only one coaxial cable and automatic equalization (up to 450 m by using12D-FB cable)
• Compact and Light• Various mounting methods for IDU, ODU, and antenna
2.4 Common platform architecture
• The ODU of 128 QAM type can be used for 32 QAM type.
2.5 Frequency Agility and Easy Tuning
• Field tunable local-oscillator (Synthesizer)• RF point frequency can be changed through LCT (Local Craft Terminal, except 6 – 8 GHz)• Frequency Tunable without changing RF FIL on Subband basis.
2.6 TX Power Control
• ATPC (Automatic Transmitter Power Control) reduces interference to neighboringsystems, improves residual BER performance, alleviates upfade problems. The adjustablerange of ATPC is -20 dB to 0 dB (128-QAM) and –23 dB to 0 dB (32-QAM).
• MTPC (Manual Transmitter Power Control) is also available through LCT. The adjustablerange of MTPC is –20 dB to 0 dB (128-QAM) and –23 dB to 0 dB (32-QAM) at 1 dB step.
2.7 System Flexibility
• (1 + 0) Unprotected• (1 + 1) Hot-standby• (1 + 1) Hot-standby with Space Diversity• (1 + 1) Twin-path (Hitless switching)• IDU is commonly used for all frequency bands.
(In case of 1+1 Hot-standby or twin-path system, either one antenna system with hybridcombiner or two antenna system excluding hybrid combiner is chosen. Please refer to Fig. 3(a), (b).)
1 + 1 Hybrid combiner: NEC provides 3 dB balance-type hybrid combiner.
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 4 -
2.8 Maintenance Facilities
• Pre-settable BER alarm point: 10-4, 10-5, 10-6
• IF, Baseband (near end, far end) loop back (without external equipment)• Remote monitoring of ODU operating condition on IDU• Calling facility between IDU’s
2.9 Service Channels (Please see 4.2 Service Channel for available channel)
• Order Wire : IDU-IDU/IDU-ODU/ODU-ODU party line connection (EOW) (EOW system using PASOLINK MONITOR (option) at ODU)
• Digital Port : 64 kbps Sync., 2 ch standard• VF Port : 0.3 to 3.4 kHz (1 ch) 600 ohms, 2 ch standard• Wayside : 2.048/1.544 Mbps, 1 ch (optional at 32 QAM STM-1)• 10 Base-T : 1 ch (optional; exclusive use in other service channels)• Cluster Alarm : 2 ch (optional; auxiliary alarm transmission)
2.10 Electromagnetic Compatibility (EMC)
• Complies to ETS 300385
2.11 Conformity with the ITU
• Conformity with the relevant ITU-R, ITU-T Recommendations and EuropeanTelecommunication Standard (ETSI)
ANTENNA
ODU 1
HYBRID
ODU 2
Figure 3(a). Ways to Mount the 1 + 1 PASOLINK+ using a single Antenna
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 5 -
Figure 3(b). Ways to Mount the 1 + 1 PASOLINK+ using two Antennas
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 6 -
This page is intentionally blank.
MTD-PL-028/1401005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 7 -
3. RELIABILITY AND QUALITY
NEC’s PASOLINK+ utilizes advanced VLSI, MIC and MMIC technology for all-solid-statecircuitry from data input to RF output.
NEC plants are located all over the world, and quality control is carefully monitored in everymanufacturing step, such as parts selection, assembly, adjustment and testing. NEC QualityControls employing Zero Defect and Value Engineering Techniques extend to every aspect ofproduction and inspection in accordance with stringent Total Quality Control programs. Inaddition, NEC plants have obtained ISO 9001 certifications.
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 8 -
This page is intentionally blank.
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 9 -
4. INTERFACE
The NEC PASOLINK+ system has the ITU-T standard interface conditions as listed below:
4.1 Digital Signal Interface
1) Main, Traffic, Electrical (STM-1) [Selectable]
• Type (ITU-T G.703) : In station section, full functionality• Bit Rate : 155.520 Mbit/s ±20 ppm• Level : 1 Vp-p (nominal) TX accepts 12.7 dB cable loss at 78 MHz• Code Format : CMI• Impedance : 75 ohms, unbalanced (nominal)• Connector : IEC 169-13
2) Main Traffic, Optical (STM-1) [Selectable]
• Type (ITU-T G.957) : S-1.1 (Inter-Office)• Bit Rate : 155.52 Mbit/s ±20 ppm• Level : S-1.1 -8 to -15 dBm (transmit level)
-8 to -28 dBm (receive level)• Connector : FC/PC 3) Main Traffic, Optical mono fiber (STM-1) [Selectable]
• Bit Rate : 155.520 Mbit/s ±20 ppm• Transmit Wavelength : A type = 1310 nm
: B type = 1550 nm• Receive Wavelength : A type = 1550 nm
: B type = 1310 nm• Mean Optical Output Power : -7 dBm (typ.)• Minimum Receive Overload Power : -3 dBm• Minimum Receive Sensitivity : -23 dBm• Connector : FC/PC
4) SOH Termination
l SOH Termination : RST (Full transparent transmission for SOH at default setting.) (E1 and F1 byte can be used for DSC.)
5) Main Traffic, Ethernet (10/100 Base-T(X)) [Selectable]
• Type : 10 Base-T/100 Base-TX (Auto-sensing or fixed)• Port Number and Interface : 2 (Each port is separated), RJ45• Transmission Rate (Port 1 + Port 2) : 100 Mbps + 50 Mbps, 75 Mbps + 75 Mbps or
2 ch. best effort selectable• Flow control : Full Duplex or Half Duprex (Backpressure)/
Auto negotiation
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 10 -
• Forwarding Mode : Store-and-Forwarding (This interface card is worked as “Ehernet Bridge.”) (This interface card is compliant with IEEE802.3.)
PASOLINK+ provides a protection switching system of Hot-standby protection (1 + 1), andtwin-path protection (1 + 1).
1. Non-Protection System
Non-protection system consists of one ODU, one IDU for 1 + 0 System, and one antenna.
2. Hot-Standby System
Hot-Standby system consists of two ODUs, one IDU for 1 + 1 system, and one or two sets ofantennas. The protection switch of this systems is performed by the TX switches on theODUs at the transmitting end and Hitless switch on the 150 M INTFC (or OPT INTFC) modulein the IDU at the receiving end.
3. Twin-path System
Twin-Path system consists of two ODUs, one IDU for 1 + 1 System, and two sets ofantennas. The protection switch of this system is performed by the Hitless switch on the 150M INTFC (or OPT INTFC) module in the IDU at the receiving end.
5.2 Antenna
The complete menu of PASOLINK+ antennas includes diameters of 0.3m to 1.8m. They aredesigned to meet stringent requirements on mechanical rigidity. Antennas with diameters of0.3m to 1.8m can be mounted directly to the ODU, making waveguides obsolete. This hasrelevant cost and reliability merits and makes the installation quicker and easier. ThePASOLINK+ pole mounting structure is designed in a way that the ODU can be replaced whilekeeping the antenna and mounting bracket, including orientation, in place. The reflectors of theantennas are covered with white diffusive paint and the mounting structure is hot-dipgalvanized.In the 6 - 8 GHz band, coaxial or waveguide cable with transducer is used for connectingbetween the ODU and IDU.
5.3 Transmitter-Receiver (ODU)
A block diagram is shown in Figure 4-5.
The transmitter-receiver is designed to handle a STM-1 signal in 6-38 GHz bands. Theequipment is designed to withstand severe weather conditions.32/128-Quadrature amplitude modulation (32/128 QAM) is applied.
Local Oscillator is employed for APC (Automatic Phase Control) loop circuit at the transmitterand receiver.
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 12 -
5.4 Indoor Unit (IDU)
The IDU consists of six (6) panels that have following functions. (Figure 4-1)
1. ODU INTFC
• Performing the multiplexing/demultiplexing of the transmitting signal, receiving signal, SV andEOW signal
• Compensating the signal loss depending on IF cable length• Automatic Gain control
2. 32 QAM MODEM / 128 QAM MODEM
• 32/128 QAM (Quadrature Amplitude Modulation), Modulator/Demodulator• Compensating quality degradation caused by fading• Error correction of burst error using the Reed –Solomon encoding/decoding• MLC (Multi Level Code) encoding/decoding. (Only for 32-AM)• Data streams conversion depending on the modulation scheme• Scrambling/de-scrambling of the data• RFCOH multiplexing/demultiplexing• Velocity conversion for radio frame
• STM-1 signal interface (150M INTFC / OPT INTFC)• RSOH multiplexing/demultiplexing (150M INTFC / OPT INTFC)• Hitless switching of No.1 and No.2 receiving signal (150M INTFC / OPT INTFC)• 2 ports 10 BASE-T/100 BASE-TX INTFC (Each port traffic is separated) (10/100 Base-
T(X))• Transparency for VLAN (IEEE 802.1Q Tagged frame) (10/100 Base-T(X))
4. CTRL
• Setting of equipment operation• Monitoring alarm status of the equipment• Performing performance monitoring• Providing upper rank NMS interface• LCT terminal interface• EOW interface
5. WS INTFC (option) (32-QAM option)
• Interface of 2048/1544 kbps Wayside signal
6. LAN CARD (Option)
• Ethernet interface (10 Base-T) card with bridge function (exclusive use against WSinterface)
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 13 -
7. DC-DC CONV
• Converting ±48 VDC (option ±24 VDC) input voltage to several internal utilizing voltages
5.5 Other Tools and Materials
1. LCT
Local Craft Terminal (LCT) is the simple provisioning and maintenance terminal forPASOLINK+ system. LCT connects to the IDU. The LCT can control all functions andmeasures all monitor levels.
2. PNMS
NEC can provide an Element Network Management tool (PNMS: PASOLINK NetworkManagement System). These tools can be used for maintenance and performancemonitoring. These tools consist of software for UNIX or WINDOWS NT® OS.
3. Coaxial Cable (Interconnection between IDU and ODU)
The 5D-FB, 8D-FB, 10D-FB or 12D-FB coaxial cable (Low loss 50 ohms) serves as theinterconnection between the transmitter-receiver (ODU) and baseband unit (IDU). The cableexchanges I/O data signals, DC power, alarm signals, control signals for frequency and TXpower, RX level and ODU primary voltage monitoring signals and a pair of orderwire signals.Due to the use of different IF (Intermediate Frequency) for TX and RX, a single coaxial cable issufficient. This results in faster and easier installation.
4. Power Supply Voltage
The nominal power supply voltage is ±48 VDC. The guaranteed range of the same unit issufficient for nominal voltage of ±36 to ±60 V (±48 V) as well. In this way, commonalitybetween modules is achieved throughout the network even if different DC voltages are appliedat different locations. (±24 VDC power supply is available as an option.)
5. PASOLINK MONITOR (OPTION)
PASOLINK MONITOR is used for receiving signal level monitor and ODU-IDU/ODU-ODUEOW system. This is an installation tool for antenna direction pointing. (Receiving level canbe measured as voltage by voltmeter without PASOLINK MONITOR.)
Figure 4-4 PASOLINK+ - Hot-standby / Space Diversity System Block Diagram
AN
TA
NT
AN
TA
NT
150M
INT
FC
:E
lect
rical
STM
-1 In
terfa
ceA
NT
:A
nten
naC
TR
L:
Con
trol
DC
-DC
CO
NV
:D
C-D
C C
onve
rter
IDU
:M
DP
-150
MB
5T-2
-
LO
:Lo
cal O
scill
ator
MO
DE
M:
Mod
ulat
or-D
emod
ulat
orO
DU
:TR
P( )
G15
0MB
5-2-
OP
T I
NT
FC
:O
ptic
al S
TM-1
Inte
rface
OW
:O
rder
wire
RF
CK
T:
Rad
io F
requ
ency
Circ
uit
ST
M-1
:S
ynch
rono
us T
rans
port
Mod
ule-
1W
S I
NT
FC
:W
aysi
de In
terfa
ce (o
ptio
nal)
*1
WS
INT
FC
or
LAN
CA
RD
is u
sed
excl
usiv
ely.
*2
150M
INT
FC
/OP
T IN
TF
C o
r 10/
100B
ase-
T(X
) IN
TF
C is
use
d ex
clus
ivel
y.
MO
DE
M
DC
-DC
CO
NV
OD
UIN
TF
C15
0M IN
TFC
/O
PT
INT
FC
MO
DE
M
DC
-DC
CO
NV
OD
UIN
TF
CW
S IN
TFC
CT
RL
ST
M-1
IN/O
UT
PN
MS
LCT
WS
IN
/O
UT
DC
-DC
CO
NV
RF
CK
T
CT
RL
LO
OW
IN
/OU
T
DC
-DC
CO
NV
RF
CK
T
CT
RL
LO
OW
IN
/OU
T
MD
UN
IT
MD
UN
IT
SW
UN
IT
OD
U(N
o.1
CH
)
OD
U(N
o.2
CH
)
IDU
LAN
CA
RD
10B
ase-
T
*1*1
*2*2
MO
DE
M
DC
-DC
CO
NV
OD
UIN
TFC
150M
INTF
C/
OP
T IN
TF
C
MO
DE
M
DC
-DC
CO
NV
OD
UIN
TFC
WS
INT
FC
CT
RL
ST
M-1
IN/O
UT
PN
MS
LCT
WS
IN
/O
UT
DC
-DC
CO
NV
RF
CK
T
CT
RL
LO
OW
IN/O
UT
DC
-DC
CO
NV
RF
CK
T
CTR
LL
O
OW
IN/O
UT
MD
UN
IT
MD
UN
IT
SW
UN
IT
OD
U(N
o.1
CH
)
OD
U(N
o.2
CH
)
IDU
LAN
CA
RD
10B
ase-
T
*1*1
*2*210
/100
Bas
e-T(
X)10
/100
Bas
e-T(
X)
2 x
10/1
00B
ase-
T(X)
2 x
10/1
00B
ase-
T(X)
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 19 -
TX first MIX (Depend on frequency band)
LO
to/fromIDU
to/fromANTENNA
CTRLDC-DC CONV
RX IF BPF
TX IFTX IF
BPFMIX MIX
MIX
MPX DUP
RF CKT
BPF
LNA
PA
Figure 4-5. PASOLINK+ - ODU Block Diagram
(a) 1+0 ODU (Type 2)
(b) 1+0 IDU
Figure 5. External View of ODU and IDU
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 20 -
Figure 6. Interconnection of ODU and IDU (1 + 0)
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 21 -
6. PERFORMANCE
6.1 Performance
STM-1/OC3 Narrow band STM-1/OC3Modulation 32 QAM 128 QAMForward Error Correction Reed-Solomon and Multi-level
CodingReed-Solomon Coding
CH Spacing 55(56) MHz 27.5 (28) MHzData Interface Electrical/OpticalATPC + MTPC Range -23 to 0 dB -20 to 0 dBAdditional Attenuation 5 dB for span equalization (except 38 GHz)
(All other values are typical except indicated as guaranteed values).Frequencyband
Network Management NMS Protocol: SNMPInterface: 10 Base-T or V.11
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 22 -
STM-1 (128 QAM)/(32 QAM)Power Supply Voltage ±36 to ±60V (EN60950) (±24V: OPTION)Power Consumption See 6.4Ambient Temperature IDU : -5°C to +50°C
ODU: -33°C to +50°C
STM-1/OC3 Narrow band STM-1/OC3SOH terminal RST modeIDU size 1+0: 1U
1+1: 3USTM-1e
OC3/STM-1 (S-1.1)BB Interface
10 Base-T/100 Base-TXWS (2 Mbps or 1.5 Mbps)(optional)
1 CH (E1, T1) -
WS/DSC 10 Base-T Interface(optional)
10 Base-T(transmission rate 2 Mbps)
(*exclusive use for WS)
10 Base-T(transmission rate 64 kbps)
Cluster Alarm(optional)
2 ch 2 ch
EOW: IDU-IDUEOW: ODU-IDUEOW: ODU-ODU
Available(PASOLINK MONITOR is used at ODU-ODU, ODU-IDU.)
ODU AGC MONITOR AvailableSystem composition 1+0, 1+1 (HS/Twin Path)Receiver BB switching Hitless SW (Switching Threshold: 10-6 to 10-12 selectable)Transmitter RF switching Power Mute SystemBB Loop Back Near End/Far End, Remote/LocalIF Loop Back Available (Local only)Frequency setting Setting available from IDU by PNMT, LCTTransmitter output setting Setting available from IDU by PNMT, LCTODU-IDC Cable Max.300 m (8D-FB), 450 m (12D-FB)PM (Performance Monitor) Conform to G.826External Alarm(See 6.7)
IDU ALMODU ALM
MAINTPS
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 23 -
6.2 IDU
Modulation type 32 MLCM 128 QAMSymbol frequency 41.51808 MHz 24.236883 MHzFEC Reed-Solomon
EOW : ODU-IDU/IDU-IDU/ODU-ODU party line connection with head set (PASOLINK MONITOR (optional) is used at ODU-ODU/ODU-IDU.)
4) Cluster ALM
Auxiliary alarm transmission
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 24 -
6.4 General
1) Power Requirement
Type 1 ±48VDC (±36V to ±60V)Type 2 ±24VDC (±20V to ±60V (option))
2) Power Consumption
1+0: 1+1:
6 – 8 GHz 75 W 150 W11 – 38 GHz 55 W 110 W
(typical) (typical)
3) Temperature Range
Guaranteed operation IDU : -5°C to +50°C
ODU : -33°C to +50°C
Workable operation IDU : -10°C to +55°C
ODU : -40°C to +55°C
Transport and storage IDU : -40°C to +70°C
ODU : -40°C to +70°C
4) Relative humidity
IDU : Less than 90% at 50°C (Non-condensing)
ODU : 100% applicable
5) Altitude
Up to 4,000 m
6) Interconnection between ODU and IDU
Interconnection : Single coaxial cable/Impedance = 50 ohmsType of cable : 5D-FB, 8D-FB, 10D-FB, 12D-FB or Equivalent cable
Signals : IF signal, alarms control, monitoring
power source, and, orderwire
Maximum cable length* : 150 m (5D-FB)
300 m (8D-FB)
350 m (10D-FB)
450 m (12D-FB)
Cable equalization : Automatic level equalization
Note* : In case of hitless protection, set each length of two IF cables to same and not to exceed 100 meters.
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 25 -
7) Mechanical Dimension
ODU : 240(W) x 243(H) x 124(D) : Approx. 5 Kg (Type 1)
: 260(W) x 410(H) x 190(D) : Approx. 10 Kg (Type 2)
IDU 1 + 0 : 482(W) x 44(H) x 292(D) : Approx. 5 Kg*
1 + 1 : 482(W) x 133(H) x 300(D) : Approx. 13 Kg*
Note*: Including option panelNote : Salt damage
In case of operating in the sea or around the coast area (within 3 km from coastline), measure must be taken for the ODU against salt damage. Please ask NEC for countermeasure.
6.5 Events
Alarm Events for 1+0 system
Event Event conditions ALM indicationLED
LOS Input signal lost (Input STM-1 signal) LED on Module panelLOF Frame synchronization lost (Input STM-1 signal) IDU ALM and LED on Module
panelINTFC ALM STM-1 interface unit failure, Loss of output STM-1 signal IDU ALM and LED on Module
panelBER (RX) ALM Excessive BER
BER degraded worse than preset value (10e-3 to 10e-5)
IDU ALM
MOD ALM TX side alarm includes unit failure, IF output signaldegraded.
IDU ALM
DEM ALM RX side alarm includes unit failure, IF signal input lost. IDU ALMWS ALM Unit fail, WS input signal lost. IDU ALMTX PWR ALM ODU transmitting power decreased ODU ALMTX IN ALM Receiving TX IF signal level decreased ODU ALMRX IN ALM Receiving signal level decreased ODU ALMAPC ALM ODU APC loop is out of lock ODU ALMMAINT ALM LCT set to MAINT status MAINT
6.6 Indication
LED Indication on the equipment front
Failure indication of the equipment unit to be replaced.
1+0 Equipment
LED indication Condition Color
MAINT During Maintenance Yellow
ODU ALM ODU equipment failure Red
IDU ALM IDU equipment failure Red
PWR On power Green
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 26 -
1+1 Equipment
LED indication Condition Color
MAINT During maintenance Yellow
ODU ALM1 ODU No.1 Equipment fail Red
IDU ALM1 IDU No.1 Equipment fail Red
ODU ALM2 ODU No.2 Equipment fail Red
IDU ALM2 IDU No.2 Equipment fail Red
PWR1 No.1: On power Green
PWR2 No.2 : On power Green
TX1 No.1 TX output Green
TX2 No.2 TX output Green
RX1 No.1 RX selected Green
RX2 No.2 RX selected Green
Note: The same fails of No.1/No.2 indicate IDU ALM1 and IDU ALM2 at the same time. TX1/2 and RX1/2 indication available only in case of 1+1 IDU.
6.7 House Keeping Alarm/Control Interface
Data In/Data Out (DI/DO) for house keeping alarms or controls are available with LCT setting.DI/DO item number is changeable by setting LCT configuration.
DI DO Comments
6 ports 4 ports (Max) DI : DI interfaces are included in ALM/AUX connector.
DO: Refer to next page “alarm output connection table”.
Port condition
DI INPUT Logic : Normal OPEN (> 200 kohms) DO OUTPUT logic : Controlled from PNMS/T
Event CLOSE (< 50 ohms) Interface circuit : Relay Form C
Interface circuit : Photo coupler with bias circuit Maximum Current : 0.2 A
OUTPUT Device : Indicates Status on PNMS/T Maximum Voltage : 100 V (AC + DC)
.
+3.3 V +3.3 V
Open
Close
Event Close
Relay
Event Open
Event Close
COM
MTD-PL-028/141005 PASOLINK+ 155 MB 1+0/1+1 SYSTEM
- 27 -
6.8 Alarm Items
Alarms outputs are available to connect to RL1 to RL11.
Alarm output connection to RL( ) is changeable by LCT.
Note: • marks are set at factory.¢ marks are range for selection.
PASOLINK+ 155 MB 1+0/1+1 SYSTEM MTD-PL-028/141005
- 28 -
6.9 Performance Monitoring/Metering Items
Item Description RemarksOFS Sum of out of frame seconds MUX/RADIO directionBBE Sum of the background block error MUX/RADIO directionES Sum of the errored seconds MUX/RADIO directionSES Sum of the severely errored seconds MUX/RADIO directionUAS Sum of the unavailable seconds MUX/RADIO directionTX PWR Transmitter output power Metering itemRX SIGNAL LEVEL Receiver input level Metering itemODU PS IN VOLTAGE ODU input voltage Metering itemBER MEASUREMENT Bit error rate Metering item
Control Item
• IF Loop Back• Baseband Loop Back (near end)• Base band Loop Back (far end)• Modulation off (CW control)• TX Power mute• TX/RX compulsive switching