pasolink maintenance
TRANSCRIPT
PASOLINK/PASOLINK+
Maintenance Quick Reference
Rev. 02 : 2003.September
NEC Corporation
PASOLINK Maintenance Quick Reference
NEC Corporation
Table of Content
1 INTRODUCTION ...........................................................................................................1
1.1 Purpose ....................................................................................................................................1
1.2 Reference Manuals..................................................................................................................1
2 MAINTENANCE SERVICE OVERVIEW .......................................................................2 2.1.1 Service Summary ..............................................................................................................2 2.1.2 Precautions........................................................................................................................2 2.1.3 Test Equipment .................................................................................................................2
3 PREVENTIVE MAINTENANCE ....................................................................................3
3.1 Frequency of Preventive Maintenance..................................................................................3
3.2 Preventive Maintenance Procedures .....................................................................................4 3.2.1 Radio Equipment ..............................................................................................................4 3.2.2 Aerial Equipment ..............................................................................................................6 3.2.3 Interface Cables and Connectors.......................................................................................7
3.3 Preventive Maintenance Flowchart.......................................................................................8
4 CORRECTIVE MAINTENANCE....................................................................................9
4.1 Corrective Maintenance Procedures .....................................................................................9 4.1.1 Radio Equipment ..............................................................................................................9 4.1.2 Aerial Equipment ............................................................................................................13 4.1.3 Interface Cables and Connectors.....................................................................................14
4.2 Corrective Maintenance Flowchart.....................................................................................15
4.3 List of Alarms ........................................................................................................................16
APPENDIX A PREVENTIVE MAINTENANCE CHECKLIST.............................................34
APPENDIX B SITE INVENTORY DATA RECORD SHEET...............................................39
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1 Introduction
1.1 Purpose This document is designed as a quick reference guide for maintenance service of the PASOLINK/PASOLINK+ system.
1.2 Reference Manuals The following list of manuals is recommended to be referenced during maintenance of the PASOLINK equipment.
No. Title Manual No. 1 PASOLINK Installation Manual (1+0
System) ROI-S03508
2 PASOLINK Instruction Manual ROI-S04614 3 PASOLINK+ Instruction Manual
(1+0/1+1 System) ROI-S04755
4 Pasolink Network Management
Terminal Operation Manual ROI- S04060
5 Pasolink Network Management System
Operation Manual, WindowsNT Version
ROI-S04067
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2 Maintenance Overview
2.1.1 Summary There are two types of Maintenance defined in the PASOLINK/ PASOLINK+ system, namely, preventive (periodic) maintenance and corrective maintenance. The customer is recommended to perform preventive maintenance according to the instruction in Chapter 3 “Preventive Maintenance” of this manual. Upon discovery of fault in the system, the customer should follow the corrective maintenance procedures detailed in Chapter 4 “Corrective Maintenance” of this document.
2.1.2 Precautions Danger: Around –43V DC power (Depends on IF cable length) is superimposed on the center conductor of the coaxial cable between the IDU and ODU. Connecting a measurement set may damage that set. Touching the coaxial cable core may cause electrical shock. Caution: To protect the internal circuits against electrostatic discharge, engineers are requested to wear the wristband and connect it to the frame ground for Electrostatic Protection (ESP) before detaching the top cover. (a) Before beginning maintenance, notify the opposite station that
maintenance is about to begin. (b) After equipment starts-up, allow the equipment to warm up for at
least 30 minutes. (c) During maintenance, set the IDU to maintenance mode using a
PNMT according to the user manual. (d) After completing the maintenance operation, restore all connections
to normal.
2.1.3 Test Equipment The test equipment and special accessories described in Table A are required for system maintenance. If recommended test equipment and accessories are not available, equivalents may be used.
Table-A Test Equipment and Accessories Required
Test Equipment/Accessory Remarks Q’ty Req’d Headset - 1 each Personal Computer (PC) with RS-232C cable for IDU
PNMT software installed 1 set
Touch-up paint For antenna 1 set
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Torque wrench, spanner, screwdrivers, tape, vinyl tape
For fixing point 1 set
Self bounding tape, vinyl tape For waterproof treatment 1 set
3 Preventive Maintenance This section describes the maintenance work that should be performed on a periodical basis in order to maintain the system at its highest quality. It should be performed by fully qualified personnel to ensure proper performance of the system and safety at the operation site.
3.1 Frequency of Preventive Maintenance To ensure continuously satisfactory operation of the system, perform the preventive maintenance on a timely basis recommended as follows. 1st: Three (3) months after the start of operation. 2nd: Twelve (12) months after the start of operation. 3rd and after: Every one (1) year. The customer is recommended to make use of Preventive Maintenance Checklist from Appendix A of this document for recording purpose.
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3.2 Preventive Maintenance Procedures
3.2.1 Radio Equipment
1. Visual inspection. Visually inspect ODU and IDU for surface damage or abnormal appearance and check looseness of bolts and nuts. Visually inspect ODU and IDU for surface damage or abnormal appearance and check looseness of bolts and nuts.
2. Meter reading a-1) Connect the PNM Terminal (PC) to the LA PORT of the IDU
using RS-232C cable. (In case on PASOLINK) a-2) Connect the PNM Terminal (PC) to the PNMT PORT of the IDU
using RS-232C cable. (In case on PASOLINK) b) Set the PNMT to show ODU monitoring data according to the
procedure in the PNMT user manual. c) When the system is in normal working condition, result shall be
the values shown in Table B below.
Table. B Meter Reading from IDU (PASOLINK V3)
Check Item Allowable Range ODU primary power supply voltage
3:5 to 4.5V DC (35 to 45V DC) (Depending on cable length between ODU and IDU)
Transmitter Power
0 to 4.6 V DC Relative to the recorded value in the site inventory data record (see Appendix B)
Receiving Level 0.2 to 4.5V DC (depending on received signal level)
Table. C Meter Reading from IDU (PASOLINK V4)
Check Item Allowable Range Transmitter Power
+0 to 4.6 V DC Relative to the recorded value in the site inventory data record (see Appendix B)
Receiving Level 0.8 to 4.4V DC (depending on received signal level)
Table. D Meter Reading from IDU (PASOLINK+)
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3. Check configurations a) Check the condition setting of the IDU according to the
procedure in the PNMT user's manual. b) Confirm if the condition setting is appropriate according to the
site inventory data. c) The latest configuration file shall be uploaded and stored. Also,
the Equipment Configuration Parameter shall be recorded and filed as site inventory data record.
Note: A copy of Site Inventory Data Record sheet is provided in Appendix B.
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3.2.2 Aerial Equipment
1. At first perform visual inspection. Visually inspect antenna and associated mounting structures and Hybrid Combiner (if applicable) for surface damage or abnormal appearance.
2. Check for loose bolt connections. Make sure that all bolts and nuts
are tightened to the specified torque. 3. Rust prevention
a) Repainting should be carried out every two years to maintain high corrosion resistance and appearance of the antenna. However the period may change if rusting or exfoliation occurs earlier.
b) For antenna, clean first by removing oil and dirt completely with solvent and then washing with water. Then apply top coat with ally alkyd enamel diffusive paint (belcoat No.5500) or equivalent.
c) For hot dip galvanized parts of the steel structure, first completely remove rust, dirt, etc. on the position causing exfoliation of plating. Then apply Amercoat No.160 with a brush or sprayer (Thickness: more than 70 microns) manufactured by Amercoat (AMERCOAT EUROPE). Note that “more than 70 microns” is roughly amount to one (1) or two (2) times of paint brushing, or two (2) or three (3) times of paint spraying.
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3.2.3 Interface Cables and Connectors
1. At first perform visual inspection. Visually inspect the following items for surface damage or abnormal appearance.
i) The connectors of jumper cable between ODU and IDU ii) Jumper cables iii) Frame ground of ODU iv) Grounding of feeder v) IF cable connector vi) Power supply cable and connector vii) Traffic IN/OUT cable and connectors viii) Alarm cable and connectors ix) Service Channel cables and connector x) NMS cable and connector
2. Check for loose bolt connections. Make sure that the jumper coaxial
cables between ODU and IDU are firmly fixed, and all bolts and nuts are tightened.
3. Check waterproof treatment. Check if waterproof treatment is in
good condition on connection point of the jumper coaxial cable at ODU, splicing points of coaxial cable, and connection points of grounding cables.
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3.3 Preventive Maintenance Flowchart The preventive maintenance procedures are outlined here in a form of flowchart for quick reference.
START
Radio Equipment Aerial Equipment Interface Cable &
Connector
Rx Signal level
Visual inspect ion?
Check loose connect ion
Rust prevent ion
Go to Correct ive
Maint enance Procedures
END
Check waterproof
Visual inspect ion?
Check meter reading
ODU P S V
Tx Power
Check configurat ion
Visual inspect ion?
Check loose connect ion
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4 Corrective Maintenance Corrective maintenance covers fault isolation, replacement and alignment. The fault isolation procedure describes isolating equipment-level faults. Therefore, if an ODU or IDU is faulty, it should be replaced with a spare and aligned. During corrective maintenance, carefully observe the precautions given in Section 2.1.2 of this document until alignment is completed.
4.1 Corrective Maintenance Procedures
4.1.1 Radio Equipment
1. Confirmation of alarm and / or malfunction
a) Confirmation of alarms, which are identified through: • Red alarm LED indication on the IDU or • Notification from external equipment
During alarm conditions, red alarm LEDs on the IDU are lit except when there is a power supply failure. Faults can be isolated using the LED indications. Table C-l provides information for isolating faults at a station.
Table C-l Fault Isolation by LED Indication on IDU
LED Indication Fault Location IDU IDU ODU ODU
b) Confirmation of malfunction using PNMS or PNMT.
2. Identify faulty equipment by observing PNMS and/or alarm indication on IDU, identify the station and equipment where alarm and/or malfunction occurred.
3. Prepare necessary test equipment and accessories, PC and
connection cable and Spare Equipment for replacement.
4. Pinpoint the fault equipment as follows. a) Check individual alarm and status condition of ODU/IDU by
using the PNMT. Refer to the PNMT user's manual for detailed procedure for monitoring.
b) Pinpoint the origin of fault with help of the instruction manual of the equipment.
c) If alarm and/or malfunction is due to equipment, go to next step. If not, go to next step 5.
5. Replacement of.
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a) IDU. The Manufacturer does not recommend replacement of modules within IDU. If a fault is identified with the IDU, the complete unit should be replaced with a spare. The faulty unit is to be returned to the factory for repair. The following actions shall be performed on the new IDU before connection to ODU. i) Downloading of the appropriate configuration file*.
*Note: The latest configuration file stored for the faulty IDU shall be used.
ii) Set the Equipment Configuration for the station according to the site inventory record. At least, TX/RX Frequency (CH) TX Attenuation, Bit Rate and Frame ID shall be set.
When replacing with a new unit, the start up procedure should be followed. Refer to the equipment instruction manual for details.
b) ODU. Before replacing the ODU with a spare, the spare must be set to meet the required functions. Provided here are procedures for replacing the ODU with spares after fault isolation and/or presetting. Removing i) Turn off the POWER switch on the front panel of the IDU. ii) Loosen tightening rings of the IF IN/OUT (N) on the ODU
by turning them counter-clockwise. iii) For waveguide connector type of ODU, to remove the
waveguide from the RF IN/OUT, remove the four waveguide fixing screws using a screwdriver. Note: Be careful not to damage the O-ring between the waveguide and ODU.
iv) Lessen four screws (M6) on the ODU. v) Remove the ODU from mounting bracket. vi) Replace ODU with a spare, taking care when handling the
waveguide contact surface. Remounting vii) When H polarization is required, rotate the ODU so as to
go up the plate marked with H. viii) When V polarization is required, rotate the ODU so as to go
up the plate marked with V. ix) Confirm if the O-ring is to be placed in the original position
properly. x) Put new ODU on the mounting bracket and align the bolts
of the ODU with the bolt holes of the mounting bracket. xi) Tighten the four screws (M6) on the ODU using a suitable
screwdriver. xii) Connect coaxial cable between the IF IN/OUT jacks on the
IDU and ODU.
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Note: After cable connection, the connector part shall be wrapped by self-bonding tape for waterproof.
xiii) For waveguide connect type of ODU, connect waveguide to RF IN//OUT with four screws using a suitable screwdriver.
xiv) Confirm that the ODU is firmly installed on the mounting bracket.
xv) Confirm the cable routing and the cable has been fastened properly.
xvi) Turn on the POWER switch on the front of the IDU. Note: Allow equipment to warn warm at least several minutes.
6. Alignment. After replacing ODU or IDU with spares, the ODU or
IDU must be aligned as follows. Caution: After replacing any unit with a spare, allow equipment to warm before at least several minutes before alignment. a) Verify that connector is firmly connected. b) Turn on the power switch on the IDU. c) Connect tester (digital multi-meter) to LINE IN (-) and LINE IN
(+) terminals above the power cable unit of the IDU. Confirm that the meter indication is described in Table C-2.
Table C-2 Meter Reading
Check Item Allowable +/- 20.0 to +/-60.0 V DC
(PASOLINK)
LINE V +/- 36.0 to +/- 60 VDC
(PASOLIN+)
d) Referring to para. B), confirm that the meter indication is normal.
ODU e) Referring to the procedure for condition setting of ODU and IDU
described in the equipment instruction manual, perform radio frequency and TX output power setting for the ODU.
IDU f) Referring to the procedure for condition setting of ODU and IDU
described in the equipment instruction manual, perform each item setting for the IDU.
g) Connect the PNMT to the LA PORT of the IDU using an RS-232C cable. (PASOLINK)
g-2) Connect the PNMT to the PNMT port of IDU using an RS-232C cable (PASOLINK+)
h) Confirm if the Equipment Configuration data stored in the
equipment is appropriate. i) Record the Equipment Configuration data as a station inventory
data.
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j) The faulty ODU and/or IDU shall be returned to the Supplier for repair.
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4.1.2 Aerial Equipment
1. Confirm malfunction. Make sure the observed malfunction is due aerial equipment.
2. Antenna Orientation. If malfunction is due to drift of antenna
direction, re-orientation of antenna should be performed. a) At each station, remove the cap from the OW/RX LEV MON jack
on ODU. b) Connect cables with F-type plug for Digital Multi-meter to RX
LEV MON jack. c) Adjust azimuth and elevation angle for the antenna direction
alternately so that the voltage measuring value becomes maximum.
d) Disconnect digital multi-meter from the RX LEV MON jacks. e) Reconnect the cap removed in step a) above.
Note In case of PASOLINK+, an Antenna Alignment Mode which extend the range of RX LEVEL MON is available. The detailed procedure shall be referred as per the instruction manual of PASOLINK+.
3. Tighten all bolts and nuts to the specified torque. (refer to
installation instruction of antenna).
4. If any rust found, following action should be made. a) For antenna, clean first by removing oil and dirt completely with
solvent and then washing with water. Then apply top coat with ally alkyd enamel diffusive paint (belcoat No.5500) or equivalent.
b) For hot dip galvanized parts of the steel structure, first completely remove rust, dirt, etc., on the position causing exfoliation of plating. Then apply Amercoat No.160 with a brush or sprayer (Thickness: more than 70 microns) manufactured by Amercoat (AMERCOAT EUROPE).
Note that “more than 70 microns” is roughly amount to one (1) or two (2) times of paint brushing, or two (2) or three (3) times of paint spraying.
5. Replacement. If any surface damage of abnormal appearance is
observed on aerial equipment, it must be replaced with spare according to owner's decision.
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4.1.3 Interface Cables and Connectors
1. Check if there is any malfunction along the interface cables.
2. If any surface damage or abnormal appearance is found on the following items, replace it with new one according to owner's decision. Items to be inspected are: a) The connectors of jumper cable between ODU and IDU b) Jumper cables c) Frame ground of ODU d) Grounding of feeder e) IF cable connector f) Power supply cable and connector g) Traffic IN/OUT cable and connectors h) Alarm cable and connectors i) Service channel cables and connector j) NMS cable and connector
3. If any loose connection found, tighten and make sure all connections
are fixed firmly.
4. If any water ingress or deterioration of waterproof treatment is found, waterproof treatment by self-bonding tape shall be replaced with new one.
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4.2 Corrective Maintenance Flowchart The corrective maintenance procedures are outlined here in a form of flowchart for quick reference.
START
Radio Equipment
Aerial Equipment Interface Cable & Connector
Alarm observed by prvent ive
maintenance
Ident ify the faulty equipment
Prepare necessary spare part s, t est equipment and
instruct ion
P inpoint the faulty equipment with help
of inst ruct ion manual
Due to equipment
Perform check to restore normal
operat ion
Replace the fault part s with spare
Malfuct ion observed
Antenna direction Any
damage
Make antenna orientat ion according to inst ruction manual
Tighten bolts and nut s to the specific torque
Any rust?
Clean and apply touch up paint
Any surface
damange?
Replace damaged part if necessary
Return faulty ODU / IDU for analysis END
Malfunct ion observed
Tighten the connectors
Any loose connect ion
Replace damaged part if necessary
Any water ingress?
Replace wat erproof treatment
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4.3 List of Alarms A list of alarms generated by PASOLINK/PASOLINK+ system is described as follow. The reasons for the alarms and the action to take to correct the faults are also included. Note that these alarms appear in the Active Alarm window of the PNMS (PASOLINK Network Management System) software when faults occur. Numbers (1) through (20) in the “Items to Check” column are in reference to PASOLINK equipment in Figure 1 through 3 at the back of the list.
Table.1 List of check items for alarm item (for PASOLINK 1 + 0)
Alarm Description Equipment where Alarm is from
Alarm Items
Items to Check Possible Cause of Failure or Action to Take
Loss of input data stream from DTE <Note 1> IDU
a) Check DTE DTE
1 INPUT -CH 01-16
b) Check data input cable and connector failure (short-circuit). (1)
Data input cable and connector failure
AIS (all "1") is received from DTE <Note 1> IDU<Note6>
a) Check DTE DTE
2 AIS RCVD-CH 01-16
b) Check data input cable and connector. (1) Data input cable and connector failure
AIS (all "1") is transmitted to DTE <Note 1> IDU<Note6>
a) Check “RX LEVEL” at item 25, if on>> Antenna system or natural fading;
b) Check “RX CLK LOSS 1-4” at item 14
c) Check “FRAME ASYNC” at item 17
3 AIS SEND-CH 01-16
d) Check “DEM” at item 22. If above item on and RX Level normal>>
Replace IDU
Loss of output data stream to DTE <Note 1> IDU
a) Check data output cable and connector failure (short-circuit). (2)
Data output cable and connector failure
4 BP OUTPUT-CH 01-16
b) Check 2M INTFC of IDU (data type, speed, etc).
IDU
Loss of Way Side traffic input <Note 2,3> IDU 5 WS INPUT
Check wayside card. (3) Wayside card failure
AIS for Way Side is received <Note 2,3> IDU<Note6> 6 WS AIS RCVD
a) Check wayside card. (3) Wayside card failure
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b) Check wayside data input cable and connector. (4)
Wayside data input cable and connector failure
c) Check DTE (data type, speed, etc) DTE
AIS for Way Side is transmitted <Note 2,3> IDU<Note6> 7 WS AIS SEND
Check wayside card. (3) Wayside card failure
Way Side output loss <Note 3> IDU
a) Check wayside data output cable and connector. (4)
Data output cable and connector failure
8 WS BP OUTPUT
b) Check DTE DTE
Loss of 34M input data stream from DTE <Note 1>
IDU
a) Check data input cable and connector. (1) Data input cable and connector failure
9 34M INPUT
b) Check DTE (data type, speed, etc) DTE
Loss of 34M output data stream to DTE <Note 1> IDU
a) Check data output cable and connector. (2) Data output cable and connector failure
10 34M OUTPUT
b) Check DTE (data type, speed, etc) DTE
AIS (all "1") is transmitted to DTE <Note 1> IDU
a) Check “RX LEVEL” at item 25, if on>> Antenna system or natural fading
b) Check “RX CLK LOSS 1-4” at item 13
c) Check “FRAME ASYNC” at item 17
11 34M AIS SEND
d) Check “DEM” at item 22. If above item on,>>
Replace IDU
AIS (all "1") is received from DTE <Note 1> IDU
a) Check DTE (data type, speed, etc) DTE
12 34M AIS RCVD
b) Check data input cable and connector failure. (1)
Data output cable and connector failure
INTFC Transmitter Clock Loss <Note 1> IDU 13 TX CLK LOSS 1-4
a) Check 2M interface card. (5) 2M interface card failure
INTFC Receiver Clock Loss <Note 1> IDU
a) Check “RX LEVEL” at item 25, if on>> Antenna system or natural fading
b) Check “RX CLK LOSS 1-4” at item 13
14 RX CLK LOSS 1-4
c) Check “FRAME ASYNC” at item 17
Replace IDU
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d) Check “DEM” at item 22. If above item on and RX level normal>>
Loss of TX DATA at INTFC <Note 1> IDU
a) Check data rate setting using LCT or PNMT/S.
IDU data rate setting
15 MUX 1-4
b) Check 2M interface card. (5) 2M interface card failure
Loss of TX DATA at TX DPU IDU
a) Check data rate setting using LCT or PNMT/S.
IDU Data rate setting
16 TX DPU
b) Check 2M interface card. (5) 2M interface card failure
Frame Asynchronous at RX DPU IDU
a) Check “RX LEVEL” at item 25, if on>> Antenna system or natural fading
17 FRAME ASYNC
b) Check Frame ID using LCT or PNMT/S IDU setting
BER > 10E-3 IDU
a) Check “RX LEVEL” at item 25, if on>> Antenna system or natural fading
18 HIGH BER
b) Check opposite site equipment Opposite site
BER > 10E-6 IDU
a) Check “RX LEVEL” at item 25, if on>> Antenna system or natural fading
19 LOW BER
b) Check opposite site equipment Opposite site
Degradation of BER (10E-3/-4/-5/-6 selectable)
<This alarm is used for triggering of AIS injection>
IDU
a) Check “RX LEVEL” at item 25, if on>> Antenna system or natural fading
20 BER
b) Check opposite site equipment Opposite site
MOD 850MHz PLL APC loop is out of lock IDU
a) Check atmosphere temperature Improve air flow
21 MOD
b) If continues MOD alarm on Replace IDU
Carrier Asynchronous IDU
a) Check “RX LEVEL” at item 25, if on>> Antenna system or natural fading
22 DEM
b) Check atmosphere temperature Improve air flow
Communication failed between ALM control card of IDU and PMC
IDU 23 PMC-ALM CONT LINK
a) Check PM Card. (6) PM card failure
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CPU communication error between IDU and ODU
IDU 24 OPR ALM
a) Check IF cable and connector (17) IF cable and connector failure
Occurred when transmitter output power is decreased
<Activated when 3 to 5dB lower than preset value>
ODU
a) Check atmosphere temperature Improve ODU temperature
25 TX POWER
b) If continuous alarm on Replace ODU
Receiving level is decreased
<Activated when less than -95dBm+/-5dB>
ODU
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
26 RX LEVEL
b) Check channel number of own site and opposite site
Correct channel number
RF 1st local APC loop out of lock ODU
a) Check atmosphere temperature Improve ODU temperature
27 TX APC
b) If continues alarm on Replace ODU
RF 2nd local APC loop out of lock ODU
a) Check atmosphere temperature Improve ODU temperature
28 RX APC
b) If continues alarm on Replace ODU
Occurred when TX IF input level is decreased
<Activated when less than approx. -63dBm>
ODU
a) Check IF cable and connector. (7) IF cable and connector failure
29 IF INPUT
b) Check IF cable length and loss. (7) IF cable length
Number of one second periods with one or more errored blocks
PNMS
a) Check “RX LEVEL” at item 25, if lower>> Antenna system or natural fading
b) Check fading margin Link design condition
30 ES THRESHOLD (15min)
c) Check interference Other near radio station
31 SES THRESHOLD (15min) Number of one second periods which contain 30% or more errored blocks during available time only
PNMS
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a) Check “RX LEVEL” at item 25, if lower>> Antenna system or natural fading
b) Check fading margin Link design condition
c) Check interference Other near radio station
Number of one second periods which contain 30% or more errored blocks during a day
PNMS
a) Check “RX LEVEL” at item 25, if lower>> Antenna system or natural fading
b) Check fading margin Link design condition
32 SES THRESHOLD (day)
c) Check interference Other near radio station
Unavailable second PNMS
a) Check “RX LEVEL” at item 25, if lower>> Antenna system or natural fading
b) Check fading margin Link design condition
33 UAS THRESHOLD (15min)
c) Check interference Other near radio station
Unavailable second PNMS
a) Check “RX LEVEL” at item 25, if lower>> Antenna system or natural fading
b) Check fading margin Link design condition
34 UAS THRESHOLD (day)
c) Check interference Other near radio station
Number of errored blocks as part of SES PNMS
a) Check “RX LEVEL” at item 25, if lower>> Antenna system or natural fading
b) Check fading margin Link design condition
35 BBE THRESHOLD (15min)
c) Check interference Other near radio station
Number of errored blocks as part of SES PNMS
a) Check “RX LEVEL” at item 25, if lower>> Antenna system or natural fading
b) Check fading margin Link design condition
36 BBE THRESHOLD (day)
c) Check interference Other near radio station
Connection loss of AUX input interface PNMS 37 INPUT-1to 6 (or NAME)
Check PM Card. (6) PM card failure
38 Loss of AUX relay output interface PNMS
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OUTPUT-1 to 4 (or NAME) Check PM Card. (6) PM card failure
Connection failed between PMC and PNMS PNMS
a) Check PM Card. (6) PM card failure
b) Check Link connection. (8) Link failure
39 PNMS LINK
c) Check PNMS cables. (9) PNMS cable failure
<Note 1> Unused channel/interface is masked according to the bit rate.
<Note 2> Way Side alarm inhibit function is applicable. Setting this function inhibits the issuance of alarm.
<Note 3> This item is masked in case of no WS system.
<Note 4> This item is masked except for 1 x 34 MB system.
<Note 5> The summarization of alarm outputs is fully user programmable; the table only shows the factory settings.
<Note 6> ALM LED does not light by the factory settings. It is changeable to light by the settings
Table 2 List of check items against alarm item (for PASOLINK 1 + 1)
Alarm Description Equipment where Alarm is from
Alarm Items
Items to Check Possible Cause of Failure or
Action to Take Loss of input data stream from DTE <Note 1>
IDU TX No.1/No.2
a) Check DTE IDU
1 INPUT -CH01-16
b) Check data input cable and
connector failure (short-circuit) (1)
Data input cable and connector failure
AIS (all "1") is received from DTE <Note 1>
IDU <Note6>
TX No.1/No.2 <Note6>
a) Check DTE (data type, speed, etc)
DTE
2 AIS RCVD-CH01-16
b) Check data input cable and connector. (11)
Data output cable and connector failure
AIS (all "1") is transmitted to DTE <Note 1>
IDU <Note6>
RX No.1/No.2 <Note6>
a) Check “RX LEVEL” at item 48,49, if on>>
Antenna system or natural fading
Check “RX CLK LOSS 1-4” at item 22
3 AIS SEND-CH01-16
b) Check “FRAME ASYNC” at item 31, 32
Replace IDU
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c) Check “DEM” at item 41, 42. If above item on and RX Level normal>>
Loss of output data stream to DTE <Note 1>
IDU RX No.1/No.2
a) Check data output cable and connector failure(short-circuit)(12)
Data output cable and connector failure
4 BP OUTPUT-CH01-16
b) Check 2M INTFC setting of IDU (data type, speed, etc)
IDU
Loss of Way Side traffic input <Note 2,3>
IDU TX No.1/No.2 5 WS INPUT
Check wayside card. (13) Wayside card failure
AIS for Way Side is received <Note 2,3>
IDU <Note6>
TX No.1/No.2 <Note6>
a) Check wayside card. (13) Wayside card failure
b) Check wayside data input cable and connector. (14)
Data output cable and connector failure
6 WS AIS RCVD
c) Check DTE (data type, speed, etc)
DTE
AIS for Way Side is transmitted <Note 2,3>
IDU <Note6>
RX No.1/No.2 <Note6>
7 WS AIS SEND
Check wayside card. (13) Wayside card failure
Way Side output loss <Note 3> IDU RX No.1/No.2
a) Check wayside data output cable and connector. (14)
Data output cable and connector failure
8 WS BP OUTPUT
b) Check DTE DTE
Loss of input data stream from DTE <1x34MB>, <Note7>
IDU TX No.1
a) Check data input cable and connector. (11)
Data output cable and connector failure
9 34M INPUT (No.1)
b) Check DTE (data type, speed, etc)
DTE
Loss of input data stream from DTE <1x34MB>, <Note7>
IDU TX No.2
a) Check data input cable and connector. (11)
Data output cable and connector failure
10 34M INPUT (No.2)
b) Check DTE (data type, speed, etc)
DTE
AIS is received from DTE <1x34MB>, <Note7>
IDU <Note6>
TX No.1<Note6> 11 34M AIS RCVD (No.1)
a) Check DTE (data type, speed, etc)
DTE
PASOLINK Maintenance Quick Reference 23
NEC Corporation
b) Check data input cable and connector. (11)
Data output cable and connector failure
AIS is received from DTE <1x34MB>, <Note7>
IDU <Note6>
TX No.2<Note6>
a) Check DTE (data type, speed, etc)
DTE
12 34M AIS RCVD (No.2)
b) Check data input cable and connector. (11)
Data output cable and connector failure
AIS is transmitted to DTE <1x34MB>, <Note7>
IDU <Note6>
RX No.1/No.2 <Note6>
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading
b) Check “RX CLK LOSS 1-4” at item 22
c) Check “FRAME ASYNC” at item 31, 32
13 34M AIS SEND (No.1)
d) Check “DEM” at item 41, 42. If above item on and RX Level normal>>
Replace IDU
AIS is transmitted to DTE <1x34MB>, <Note7>
IDU <Note6>
RX No.1/No.2 <Note6>
a) Check “RX LEVEL” at item 48,49, if on>>
Antenna system or natural fading
b) Check “RX CLK LOSS 1-4” at item 22
c) Check “FRAME ASYNC” at item 31, 32
14 34M AIS SEND (No.2)
d) Check “DEM” at item 41, 42. If above item on and RX Level normal>>
Replace IDU
Loss of output data stream to DTE <1x34MB>, <Note7>
IDU RX No.1
a) Check data output cable and connector. (12)
Data output cable and connector failure
15 34M BP OUTPUT (No.1)
b) Check DTE (data type, speed, etc)
DTE
Loss of output data stream to DTE <1x34MB>, <Note7>
IDU RX No.2
a) Check data output cable and connector. (12)
Data output cable and connector failure
16 34M BP OUTPUT (No.2)
b) Check DTE (data type, speed, etc)
DTE
17 TX DPU (No.1) Loss of TX DPU clock to 2M(8M) INTFC
IDU TX No.1
PASOLINK Maintenance Quick Reference 24
NEC Corporation
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
b) Check 2M interface card. (15) 2M interface card failure
Loss of TX DPU clock to 2M(8M) INTFC
IDU TX No.2
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
18 TX DPU (No.2)
b) Check 2M interface card. (15) 2M interface card failure
Loss of RX DPU clock to 2M(8M) INTFC
IDU RX No.1
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
19 RX DPU (No.1)
b) Check 2M interface card. (15) 2M interface card failure
Loss of RX DPU clock to 2M(8M) INTFC
IDU RX No.2
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
20 RX DPU (No.2)
b) Check 2M interface card. (15) 2M interface card failure
INTFC Transmitter clock loss <Note 1>
IDU TX No.1/No.2
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
21 TX CLK LOSS 1-4
b) Check 2M interface card. (15) 2M interface card failure
INTFC Receiver clock loss <Note 1> IDU RX No.1/No.2
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading;
b) Check “RX CLK LOSS 1-4” at item 22.
c) Check “FRAME ASYNC” at item 31, 32.
22 RX CLK LOSS 1-4
d) Check “DEM” at item 41, 42. If above item on and RX Level normal>>
Replace IDU
34M INTFC Transmitter clock loss <Note 4>, <Note7>
IDU TX No.1
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
23 TX CLK LOSS (No.1)
b) Check connector between MD and SW (behind MD unit). (18)
Connector failure between MD and SW
34M INTFC Transmitter clock loss <Note 4>, <Note7>
IDU TX No.2 24 TX CLK LOSS (No.2)
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
PASOLINK Maintenance Quick Reference 25
NEC Corporation
b) Check connector between MD and SW (behind MD unit). (18)
Connector failure between MD and SW
34M INTFC Receiver clock loss <Note 4>, < Note7>
IDU RX No.1
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
25 RX CLK LOSS (No.1)
b) Check connector between MD and SW (behind MD unit). (18)
Connector failure between MD and SW
34M INTFC Receiver clock loss <Note 4>, <Note7>
IDU RX No.2
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
26 RX CLK LOSS (No.2)
b) Check connector between MD and SW (behind MD unit). (18)
Connector failure between MD and SW
Loss of TX DATA from INTFC at TX DPU <Note 1>
IDU TX No.1
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
27 MUX 1-4(No.1)
b) Check 2M interface card. (15) 2M interface card failure
Loss of TX DATA from INTFC at TX DPU <Note 1>
IDU TX No.2
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
28 MUX 1-4 (No.2)
b) Check 2M interface card. (15) 2M interface card failure
Loss of TX DATA to MOD at TX DPU IDU TX No.1
a) Check data rate setting using LCT or PNMT/S.
IDU data rate setting
29 TX DPU (No.1)
b) Check 2M interface card. (15) 2M interface card failure
Loss of TX DATA to MOD at TX DPU IDU TX No.2
a) Check data rate setting using LCT or PNMT/S
IDU data rate setting
30 TX DPU (No 2)
b) Check 2M interface card. (15) 2M interface card failure
Frame Asynchronous at RX DPU IDU RX No.1
a) Check “RX LEVEL” at item 48,49 if lower>>
Antenna system or natural fading
31 FRAME ASYNC (No.1)
b) Check Frame ID using LCT or PNMT/S
IDU setting
Frame Asynchronous at RX DPU IDU RX No.2
a) Check “RX LEVEL” at item 48,49 if lower>>
Antenna system or natural fading
32 FRAME ASYNC (No.2)
b) Check Frame ID using LCT or PNMT/S
IDU setting
33 HIGH BER (No.1) BER > 10E-3 IDU RX No.1
PASOLINK Maintenance Quick Reference 26
NEC Corporation
a) Check “RX LEVEL” at item 48,49 if lower>>
Antenna system or natural fading
b) Check opposite site equipment Opposite site
BER > 10E-3 IDU RX No.2 a) Check “RX LEVEL” at item 48,49
if lower>> Antenna system or natural fading
34 HIGH BER (No.2)
b) Check opposite site equipment Opposite site
BER > 10E-6 IDU RX No.1 a) Check “RX LEVEL” at item 48,49
if lower>> Antenna system or natural fading
35 LOW BER (No.1)
b) Check opposite site equipment Opposite site
BER > 10E-6 IDU RX No.2
a) Check “RX LEVEL” at item 48,49 if lower>>
Antenna system or natural fading
36 LOW BER (No.2)
b) Check opposite site equipment Opposite site
Degradation of BER (10E-3/-4/-5/-6 selectable) <This alarm is used for triggering of AIS injection>
IDU RX No.1
a) Check “RX LEVEL” at item 48,49 if lower>>
Antenna system or natural fading
37 BER (No.1)
b) Check opposite site equipment Opposite site
Degradation of BER (10E-3/-4/-5/-6 selectable) <This alarm is used for triggering of AIS injection>
IDU RX No.2
a) Check “RX LEVEL” at item 48,49 if on>>
Antenna system or natural fading
38 BER (No.2)
b) Check opposite site equipment Opposite site
MOD 850MHz PLL APC loop is out of lock
IDU TX No.1
a) Check atmosphere temperature Improve air flow
39 MOD (No.1)
b) If continues MOD alarm on Replace MD (No.1)
MOD 850MHz PLL APC loop is out of lock
IDU TX No.2
a) Check atmosphere temperature Improve air flow
40 MOD (No.2)
b) If continues MOD alarm on Replace MD (No.2)
Carrier asynchronous IDU RX No.1
a) Check “RX LEVEL” at item 48,49 if on>>
Antenna system or natural fading
41 DEM (No.1)
b) Check atmosphere temperature Improve air flow
Carrier asynchronous IDU RX No.2 42 DEM (No.2) a) Check “RX LEVEL” at item 48,49
if on>> Antenna system or natural fading
PASOLINK Maintenance Quick Reference 27
NEC Corporation
b) Check atmosphere temperature Improve air flow
Communication fail between ALM control card of IDU and PMC
IDU SW 43 PMC-ALM CONT LINK
a) Check PM Card. (16) PM card failure
CPU communication error between IDU and ODU
IDU TX/RX No.1 44 OPR ALM (No.1)
a) Check IF cable and connector. (17)
IF cable and connector failure
CPU communication error between IDU and ODU
IDU TX/RX No.2 45 OPR ALM (No.2)
a) Check IF cable and connector. (17)
IF cable and connector failure
Transmitter output power decrease <Activated when 3 to 5dB lower than preset.>
ODU TX No.1
a) Check atmosphere temperature
Improve ODU temperature
46 TX POWER (No.1)
b) If continues alarm on Replace ODU Transmitter output power decrease <Activated when 3 to 5dB lower than preset.>
ODU TX No.2
a) Check atmosphere temperature Improve ODU temperature
47 TX POWER (No.2)
b) If continues alarm on Replace ODU Receiving level decrease <Activated when less than -95dBm+/-5dB)
ODU RX No.1
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
48 RX LEVEL (No.1)
b) Check channel number of own site and opposite site
Correct channel number
Receiving level decrease <Activated when less than -95dBm+/-5dB)
ODU RX No.2
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
49 RX LEVEL (No.2)
b) Check channel number of own site and opposite site
Correct channel number
RF 1st local APC loop out of lock ODU TX No.1
a) Check atmosphere temperature Improve ODU temperature 50 TX APC (No.1)
b) If continues alarm on Replace ODU RF 1st local APC loop out of lock ODU TX No.2
a) Check atmosphere temperature Improve ODU temperature 51 TX APC (No.2)
b) If continues alarm on Replace ODU RF 2nd local APC loop out of lock ODU RX No.1 52 RX APC (No.1)
a) Check atmosphere temperature Improve ODU temperature
PASOLINK Maintenance Quick Reference 28
NEC Corporation
b) If continues alarm on Replace ODU RF 2nd local APC loop out of lock ODU RX No.2
a) Check atmosphere temperature Improve ODU temperature 53 RX APC (No.2)
b) If continues alarm on Replace ODU TX IF input level decrease <Activated when less than approx. -63dBm>
ODU TX No.1
a) Check IF cable and connector. (17)
IF cable and connector failure
54 IF INPUT (No.1)
b) Check IF cable length and loss. (17)
IF cable length
TX IF input level decrease <Activated when less than approx. -63dBm>
ODU TX No.2
a) Check IF cable and connector. (17)
IF cable and connector failure
55 IF INPUT (No.2)
b) Check IF cable length and loss. (17)
IF cable length
CPU communication error between MD and SW
SW/MDP TX/RX No.1 56 MDP CPU (No.1)
Check connector behind MD. (18) Connector failure behind MD Unit
CPU communication error between MD and SW
SW/MDP TX/RX No.2 57 MDP CPU (No.2)
Check connector behind MD. (18) Connector failure behind MD Unit
Number of one second periods with one or more errored blocks
PNMS Common
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading
b) Check fading margin Link design condition
58 ES THRESHOLD (15min)
c) Check interference Other near radio station
Number of one second periods which contain 30% or more errored blocks during available time only
PNMS Common
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading
b) Check fading margin Link design condition
59 SES THRESHOLD (15min)
c) Check interference Other near radio station
Number of one second periods which contain 30% or more errored blocks during a day
PNMS Common
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading
60 SES THRESHOLD (day)
b) Check fading margin Link design condition
PASOLINK Maintenance Quick Reference 29
NEC Corporation
c) Check interference Other near radio station
Unavailable second PNMS Common
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading
b) Check fading margin Link design condition
61 UAS THRESHOLD (15min)
c) Check interference Other near radio station
Unavailable second PNMS Common
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading
b) Check fading margin Link design condition
62 UAS THRESHOLD (day)
c) Check interference Other near radio station
Number of errored blocks as part of SES
PNMS Common
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading
b) Check fading margin Link design condition
63 BBE THRESHOLD (15min)
c) Check interference Other near radio station
Number of errored blocks as part of SES
PNMS Common
a) Check “RX LEVEL” at item 48,49, if lower>>
Antenna system or natural fading
b) Check fading margin Link design condition
64 BBE THRESHOLD (day)
c) Check interference Other near radio station
Connection loss of AUX input interface
AUX SW UNIT 65 INPUT-1-6 (or NAME)
Check PM Card. (16)
Loss of AUX relay output interface AUX SW UNIT 66 OUTPUT-1-4 (or NAME)
Check PM Card. (16) PM card failure
Connection fail between PMC and PNMS
PNMS Common
1. Check PM Card. (16) PM card failure
2. Check Link connection (20) Link failure
67 PNMS LINK
3. Check PNMS cables. (19) PNMS cable failure
<Note 1> Unused channel/interface is masked according to the bit rate.
<Note 2> Way Side alarm inhibit function is applicable. Setting this function inhibits the issuance of alarm.
<Note 3> This item is masked in case of no WS system.
PASOLINK Maintenance Quick Reference 30
NEC Corporation
<Note 4> This item is masked in case of 1x34MB system.
<Note 5> The summarization of alarm outputs is fully user programmable; the table only shows the factory settings.
<Note 6> ALM LED does not light by the factory settings. It is changeable to light by the settings
PASOLINK Maintenance Quick Reference 31
NEC Corporation
Table.3 List of check items for alarm item (for PASOLINK+ 1 + 0)
Alarm Description Equipment where Alarm is from
Alarm Items
Items to Check Possible Cause of Failure or Action to Take
Input STM-1 signal is lost (From MUX) IDU
a) Check data input cable and connector failure from MUX (Short-circuit)
Data input cable and connector failure
1 MAIN INTFC LOS (MUX)
b) Check MUX MUX
Frame synchronization of input STM-1 signal (From MUX) is lost
IDU
a) Check data input cable and connector failure from MUX (Short-circuit)
Data input cable and connector failure
2 MAIN INTFC LOF (MUX)
b) Check MUX
BER is worse than preset value (10-3 to 10-5, selectable)
IDU
a) Check data input cable and connector failure from MUX (Short circuit/Loose connect)
Data input cable and connector failure
3 E-BER (MUX)
b) Check MUX MUX
BER is worse than preset value (10-5 to 10-9, selectable)
IDU
a) Check data input cable and connector failure from MUX (Short circuit/Loose connect)
Data input cable and connector failure
4 SD (MUX)
b) Check MUX MUX
Input STM-1 signal is lost (From Radio) IDU 5 MAIN INTFC LOS (DMR)
a) Check IDU and INTFC card IDU/INTFC failure (IDU replace)
Frame synchronization of input STM-1 signal (From Radio) is lost
IDU 6 MAIN INTFC LOF (DMR)
a) Check IDU and INTFC card IDU/INTFC failure (IDU replace)
BER is worse than preset value (10-3 to 10-5, selectable)
IDU
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
7 E-BER (DMR)
b) Check opposite Station Opposite station
PASOLINK Maintenance Quick Reference 32
NEC Corporation
c) Check IDU and INTFC card IDU/INTFC (Replace IDU)
BER is worse than preset value (10-5 to 10-9, selectable)
IDU
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
8 SD (DMR)
b) Check opposite Station Opposite station
150M INTFC/OPT INTFC/10/100BASE-T INTFC module failure
150M Intfc/Opt Intfc
/10/100BASE-T Intfc
9 MAIN INTFC
a) Check IDU/INTFC card IDU/INTFC (Replace IDU)
Link of LAN (10/100 BASE-T INTFC) and associated equipment is not established
IDU
a) Check data input cable and connector failure from/to DTE
Data input cable and connector failure
b) Check DTE DTE
10 LINK
c) Check LAN card inside IDU LAN INTFC (Replace IDU)
WS INTFC,WS/ALM INTFC, ALM INTFC or LAN CARD(DSC) module failure
IDU 11 SUB INTFC
a) Check each Sub Module Sub INTFC (Replace IDU)
Communication between modules failure IDU 12 MD CPU ALM
a) Check IDU IDU (Replace IDU)
Modulator failure IDU
a) Check Atmosphere Temperature Improve enveronment condition of IDU
13 MOD ALM
b) If continues MOD alarm on, Replace IDU
Demodulator failure and input IF signal is lost IDU
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
b) Check Atmosphere Temperature Improve enveronment condition of IDU
14 DEM ALM
c) Check Frame ID using LCT or PNMT/S IDU Setting
MODEM failure IDU 15 MODEM
a) Check IDU Replace IDU
DC-DC CONV failure IDU 16 PS
a) Check DC Line voltage provided to IDU DC Voltage unstable
PASOLINK Maintenance Quick Reference 33
NEC Corporation
b) Check Power cable and connector Power CBL Connector
c) If continuous PS ALM on Replace IDU
Transmit RF power increases/decreases approx 3dB from normal
ODU
a) Check Atmosphere Temperature Improve enveronment condition of ODU
19 TX PWR ALM
b) If continues TX PWR ALM alarm on, Replace ODU
TX IF input signal from the IDU is lost IDU
a) Check IF Cable and Connector IF cable and connector failure
20 TX INPUT ALM
b) Check IF Cable Loss IF cable loss
Receiver input level decreases below squelch level as shown below
32QAM : -81dBm
128QAM : -72dBm
ODU 21 RX LEVEL ALM
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
b) Check opposite site Opposite site
Local oscillator is unlocked ODU 22 APC ALM
a) Check Atmosphere Temperature Improve ODU temperature
b) If continues alarm on Replace ODU
Communication between the ODU and IDU is lost
ODU 23 CABLE ALM
a) Check IF cable and connector IF cable and connector failure
24 MAINT The equipment is in maintenance mode. In this mode, the following control can be performed.
ATPC manual control
Loopback
TX mute
ALS manual restart
CW
MAINT
PASOLINK Maintenance Quick Reference 34
NEC Corporation
Table.4 List of check items for alarm item (for PASOLINK+ 1 + 1)
Alarm Description Equipment where Alarm is from
Alarm Items
Items to Check Possible Cause of Failure or Action to Take
Input STM-1 signal is lost (From MUX) IDU IDU No 1/2
a) Check data input cable and connector failure from MUX (Short-circuit)
Data input cable and connector failure
1 MAIN INTFC LOS (MUX)
b) Check MUX MUX
Frame synchronization of input STM-1 signal (From MUX) is lost
IDU IDU No 1/2
a) Check data input cable and connector failure from MUX (Short-circuit)
Data input cable and connector failure
2 MAIN INTFC LOF (MUX)
b) Check MUX
BER is worse than preset value (10-3 to 10-5, selectable)
IDU IDU No 1 /2
a) Check data input cable and connector failure from MUX (Short circuit/Loose connect)
Data input cable and connector failure
3 E-BER (MUX)
b) Check MUX MUX
BER is worse than preset value (10-5 to 10-9, selectable)
IDU IDU No 1 /2
a) Check data input cable and connector failure from MUX (Short circuit/Loose connect)
Data input cable and connector failure
4 SD (MUX)
b) Check MUX MUX
Input STM-1 signal is lost (From Radio) IDU IDU No 1 /2 5 MAIN INTFC LOS (DMR)
a) Check IDU and INTFC card IDU/INTFC failure
Frame synchronization of input STM-1 signal (From Radio) is lost
IDU IDU No 1 /2 6 MAIN INTFC LOF (DMR)
a) Check IDU and INTFC card IDU/INTFC (IDU replace)
BER is worse than preset value (10-3 to 10-5, selectable)
IDU IDU No 1 /2
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
b) Check opposite Station Opposite station
7 E-BER (DMR)
c) Check IDU and INTFC card IDU/INTFC (Replace IDU)
PASOLINK Maintenance Quick Reference 35
NEC Corporation
BER is worse than preset value (10-5 to 10-9, selectable)
IDU IDU No 1 /2
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
8 SD (DMR)
b) Check opposite Station Opposite station
150M INTFC/OPT INTFC/10/100BASE-T INTFC module failure
150M Intfc/Opt Intfc
/10/100BASE-T Intfc
9 MAIN INTFC
a) Check IDU/INTFC card IDU/INTFC (Replace IDU)
Link of LAN (10/100 BASE-T INTFC) and associated equipment is not established
Link 1/ 2
a) Check data input cable and connector failure from/to DTE
Data input cable and connector failure
b) Check DTE DTE
10 LINK
c) Check LAN card inside IDU LAN INTFC (Replace IDU)
WS INTFC,WS/ALM INTFC, ALM INTFC or LAN CARD(DSC) module failure
WS, WS/ALM, ALM INTFC or LAN Card
11 SUB INTFC
a) Check each Sub Module Sub INTFC (Replace Sub Intfc)
Communication between modules failure IDU IDU No 1/ 2 12 MD CPU ALM
a) Check IDU IDU(Replace IDU)
Modulator failure IDU IDU No 1 /2
a) Check Atmosphere Temperature Improve enveronment condition of IDU
13 MOD ALM
b) If continues MOD alarm on, IDU(Replace IDU)
Demodulator failure and input IF signal is lost IDU IDU No 1 /2
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
b) Check Frame ID using LCT or PNMT/S IDU Setting
14 DEM ALM
c) Check Atmosphere Temperature Improve enveronment condition of IDU
d) If continues MOD alarm on, IDU(Replace IDU)
BER is worse than preset value (10-4 to 10-6, selectable)
IDU IDU No 1/2
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
15 High BER ALM
b) Check opposite Station Opposite station
PASOLINK Maintenance Quick Reference 36
NEC Corporation
c) Check IDU IDU(Replace IDU)
BER is worse than preset value (10-6 to 10-12, selectable)
IDU
a) Check “RX LEVEL”, if lower>> Antenna system or natural fading
b) Check opposite Station Opposite station
16 Low BER ALM
c) Check IDU
MODEM failure IDU IDU No 1 /2 17 MODEM
b) Check IDU Replace IDU
DC-DC CONV failure IDU IDU No 1 /2
d) Check DC Line voltage provided to IDU DC Voltage unstable
e) Check Power cable and connector Power CBL Connector
18 PS
f) If continuous PS ALM on Replace IDU
Transmit RF power increases/decreases approx 3dB from normal
ODU ODU No 1/2
c) Check Atmosphere Temperature Improve enveronment condition of ODU
19 TX PWR ALM
d) If continues TX PWR ALM alarm on, Replace ODU
TX IF input signal from the IDU is lost ODU ODU No 1/2
c) Check IF Cable and Connector IF cable and connector failure
20 TX INPUT ALM
d) Check IF Cable Loss IF cable loss
Receiver input level decreases below squelch level as shown below
32QAM : -81dBm
128QAM : -72dBm
ODU ODU No 1 /2 21 RX LEVEL ALM
c) Check “RX LEVEL”, if lower>> Antenna system or natural fading
d) Check opposite site Opposite site
Local oscillator is unlocked ODU ODU No 1/2 22 APC ALM
c) Check Atmosphere Temperature Improve ODU temperature
d) If continues alarm on Replace ODU
Communication between the ODU and IDU is lost
IF CBL
Cable No 1 /223 CABLE ALM
b) Check IF cable and connector IF cable and connector failure
PASOLINK Maintenance Quick Reference 37
NEC Corporation
24 MAINT The equipment is in maintenance mode. In this mode, the following control can be performed.
ATPC manual control
Loopback
TX mute
ALS manual restart
CW
MAINT
PASOLINK Maintenance Quick Reference 38
NEC Corporation
Appendix A Preventive Maintenance Checklist
Preventive Maintenance Cheek List Site Name:_________________
Check Date Equipment
Location
Check Item / / / / / / / /
ODU Visual IDU Visual
ODU primary power supply Transmitter Power Receiving Level
Radio
IDU through PNMT Configuration Setting
Visual Tightened with specified torque?
Antenna Rust
Visual Tightened with specified torque?
Aerial
Bracket Rust
Firmly fixed?
Connectors of jumper between ODU and feeder Waterproof The jumper cable Firmly tied with antenna pole? Frame ground of ODU Firmly connected to the earth
bar?
Firmly connected to the earth bar?
Firmly connected to the jumper cable?
The feeder Water proof IF cable connector Firmly fixed? Traffic cable connector
Firmly fixed?
Alarm cable connector Firmly fixed? Service Channel Cable Firmly fixed? Frame ground of IDU Firmly connected to the earth
bar?
Cable Power supply cable
and connector Firmly connected?
PASOLINK Maintenance Quick Reference 39
NEC Corporation
Appendix B Site Inventory Data Record Sheet
Site Inventory Data Record Sheet Site Name:_________________
Installation Date:_________________ To: ODU1 Serial No.:
Tx Frequency:
MHz Channel No.:
Rx Frequency: MHz
Channel No.: Transmitter Power:
dBmReceiving Level:
dBmODU2 Serial No.:
Tx Frequency:
MHz Channel No.:
Rx Frequency: MHz
Channel No.: Transmitter Power:
dBmReceiving Level:
dBm Primary DC voltage:
V
IDU Serial No.: Bit rate: Frame ID MB 2 × 2 ڤ
MB 2 × 4 ڤ MB 2 × 8 ڤ MB 2 × 16 ڤMB 8 × 1 ڤ
Default ڤ
To: ODU1 Serial No.:
Tx Frequency:
MHz Channel No.:
Rx Frequency: MHz
Channel No.: Transmitter Power:
dBmReceiving Level:
dBmODU2 Serial No.:
Tx Frequency:
MHz Channel No.:
Rx Frequency: MHz
Channel No.: Transmitter Power:
dBmReceiving Level:
dBm Primary DC voltage:
V
IDU Serial No.: Bit rate: Frame ID MB 2 × 2 ڤ
MB 2 × 4 ڤ MB 2 × 8 ڤ MB 2 × 16 ڤMB 8 × 1 ڤ
Default ڤ