Wire Tech WR-1004MLD Скачать руководство пользователя страница 10

       

WR-1004MLD Outdoor Optical Node Operation and Maintenance Manual

 

  

 

- 9 - 

9. Common Failure Analysis and Troubleshooting 

Failure phenomenon 

Failure cause 

Solution 

After  connecting  the 

network,  the  image  of 

the  optical  contact  point 

has 

obvious 

netlike 

curve  or  large  particles 

highlights but the image 

background is clean. 

1.  The  optical  input  power  of  the 

optical  receiver  is  too  high,  make 

the  output  level  of  the  optical 

receiver  module  too  high  and  RF 

signal index deteriorate.   

2. The RF signal (input the optical 

transmitter) index is poor. 

1.  Check  the  optical  input  power  and  make 

appropriate  adjustments  to  make  it  in  the 

specified  range;  or  adjust  the  attenuation  of 

optical  receiver  to  reduce  the  output  level 

and improve index.   

2. Check the front end machine room optical 

transmitter  RF  signal  index  and  make 

appropriate adjustments. 

After  connecting  the 

network,  the  image  of 

the  optical  contact  point 

has obvious noises. 

1.  The  optical  input  power  of  the 

optical  receiver  is  not  high 

enough,  results  in  the  decrease  of 

C/N.   

2.  The  optical  fiber  connector  or 

adapter of the  optical  receiver  has 

been polluted. 

3. The RF input signal level of the 

optical  transmitter  is  too  low, 

make the modulation degree of the 

laser is not enough.   

4.  The  C/N  index  of  system  link 

signal is too low. 

1.  Check  the  received  optical  power  of  the 

optical  contact  point  and  make  appropriate 

adjustments to make it in the specified range. 

2. Improve the optical received power of the 

optical  contact  point  by  cleaning  the  optical 

fiber  connector  or  adapter  etc  methods. 
Specific  operation  methods  see  “Clean  and 

maintenance  method  of  the  optical  fiber 
connector”.   

3.  Check  the  RF  input  signal  level  of  the 

optical transmitter and adjust to the required 

input  range.  (When  the  input  channels 

number  less  than  15,  should  be  higher  than 

the nominal value.) 

4.  Use  a  spectrum  analyzer  to  check  the 

system  link  C/N  and  make  appropriate 

adjustments.  Make  sure  the  system  link 

signal C/N

51dB. 

After  connecting  the 

network,  the  images  of 

several  optical  contact 

points  randomly  appear 

obvious  noises  or  bright 

traces. 

The optical contact point has open 

circuit  signal  interference  or 

strong 

interference 

signal 

intrusion. 

1.  Check  if  there  is  a  strong  interference 

signal  source;  change  the  optical  contact 

point  location  if  possible  to  avoid  the 

influence  of  the  strong  interference  signal 

source.   

2. Check the cable lines of the optical contact 

point,  if  there  is  shielding  net  or  situation 

that  the  RF  connector  shielding  effect  is  not 

good.   

3. Tightly closed the equipment enclosure to 

ensure  the  shielding  effect;  if  possible  add 

shielding  cover  to  the  optical  contact  point 

and reliable grounding. 

 

 

 

Содержание WR-1004MLD

Страница 1: ... do o oo o or r r O O Op p pt t ti i ic c ca a al l l N N No o od d de e e O O Op p pe e er r ra a at t ti i io o on n n a a an n nd d d M M Ma a ai i in n nt t te e en n na a an n nc c ce e e M M Ma a an n nu u ua a al l l 2 20 01 16 6 1 1 V Ve er rs si io on n 1 1 ...

Страница 2: ...DOCSIS EOC networking scheme 3 Technique Parameter 3 1 Link Testing Conditions The performance parameters of this manual according to the measuring method of GY T 194 2003 Specifications and methods of measurement on optical node used in CATV systems and tested in the following conditions 1 Forward optical receive part with 10km standard optical fiber passive optical attenuator and standard optica...

Страница 3: ...B 0 75 Rated Output Level dBμV 108 when the optical AGC control range is 2 8 Max Output Level dBμV 114 when the optical AGC control range is 2 5 Output Return Loss dB 85 550MHz 16 550 1000MHz 14 Redundant Receiver Isolation dB 75 Output Impedance Ω 75 Return Part Optical Parameters Optical Transmit Wavelength nm 1310 10 1550 10 or specified by the user Laser Type DFB or FP laser Output Optical Pow...

Страница 4: ...gain dB 0 1 Port CMTS_US OUT Isolation forward path CMTS_US return path output dB 70 General Performance Power voltage V A AC 150 265 V B AC 35 90 V Feed current through A 10 Operating temperature 40 60 Storage temperature 40 70 Relative humidity Max 95 no condensation Consumption VA 42 Dimension mm 460 L 282 W 175 H 4 Block Diagram 5 Relation Table of Input Optical Power and CNR ...

Страница 5: ...WR 1004MLD Outdoor Optical Node Operation and Maintenance Manual 4 ...

Страница 6: ...WR 1004MLD Outdoor Optical Node Operation and Maintenance Manual 5 6 Function Display and Operating Instruction ...

Страница 7: ...wer module 1 socket 13 220Vac input 14 The RF output test port 20dB of forward path optical receiver modules 15 RF output of forward path optical receiver modules 16 The RF input interface of return path optical transmit modules 1 17 The RF input interface of return path optical transmit modules 2 18 Power 1 fuse 19 Power module 1 20 Power 2 fuse 21 Power module 2 22 Forward path optical receiver ...

Страница 8: ...t port 20dB 13 Forward path RF input 14 Port 4 return path input test port 20dB 15 Return path RF output 2 16 Return path RF output 1 17 Mode setting and attenuation jumper 18 Return path components 19 Port 3 return path input test port 20dB 20 Port 2 return path input test port 20dB 21 Port 2 forward path output test port 20dB 22 Port 2 23 Port 2 feed fuse 24 AC60V independent feed port 25 Handle...

Страница 9: ...t the computer and responder can be direct connected and change the computer IP to 192 168 1 XXX XXX is any number from 0 to 255 except 168 start upper computer network management software then search the device and log in 3 Right click device icon and choose modify the device IP 4 Enter new IP address gateway and subnet mask 5 Click modify then exit it is done There will show new IP address and g...

Страница 10: ...h 4 The C N index of system link signal is too low 1 Check the received optical power of the optical contact point and make appropriate adjustments to make it in the specified range 2 Improve the optical received power of the optical contact point by cleaning the optical fiber connector or adapter etc methods Specific operation methods see Clean and maintenance method of the optical fiber connecto...

Страница 11: ...the optical fiber connector or the optical fiber connector has been polluted by the dust or dirt Now introduce some common clean and maintenance methods of the optical fiber active connector 1 Carefully pull off the optical fiber active connector from the adapter The optical fiber active connector should not aim at the human body or the naked eyes to avoid accidental injury 2 Wash carefully with g...

Страница 12: ... unavoidable environment reasons we will responsible maintenance but ask suitable material cost 2 When the equipment breaks down immediately contact local distributor or directly call our technical support hotline 86 0571 82576002 18967160936 3 The site maintenance of the fault equipment must be operated by professional technicians to avoid worse damage Special notice If the equipment has been mai...

Отзывы: