Superior Cabling Tutorial Nov 02

Atuncay

Description

Copper Cabling Performance• Cat5 Installed base performance• Cat5e performance• Cat6 performance• Noise immunity for applications• Alien NEXT and ELFEXT• Extended Frequency PerformanceCat5 Installed Base• Component performance specified for NEXT, Insertion Loss, and Return Loss• Channel performance not field verified, Cabling measurement specifications (TIA TSB-67) came later.• After the fact, Channel Return Loss and ELFEXT were specified in TIA TSB-95. • During this time, connector design was not well understood, so cabling installed performance varied widely.• Even so, many installed channels may meet Cat5e performance requirements (with ahandwave).Cat5 Channel PerformanceNEXT ELFEXT12 NEXT Fwd12-1ELFEXT13 NEXT Fwd13-1ELFEXT0014 NEXT Fwd14-1ELFEXT-10-1023 NEXT Fwd23-2ELFEXT-20-2024 NEXT Fwd 24-2ELFEXT-30-3034 NEXT Fwd34-3ELFEXT-40-4012 NEXT Rev12-2ELFEXT-50-5013 NEXT Rev13-3ELFEXT-60 -6014 NEXT Rev 14-4ELFEXT-70-7023 NEXT Rev 23-3ELFEXT-80-8024 NEXT Rev 24-4ELFEXT-90-90 34-4ELFEXT34 NEXT Rev-100 Cat 5e TIA -100 Cat 5e TIA1 10 100 10001 10 100 1000F, MHzF, MHzReturn Loss Attenuation00RL 1 Fwd-10-10RL 2 FwdATT 1 Fwd-20RL 3 Fwd-20ATT 2 FwdRL 4 Fwd-30ATT 3 Fwd-30RL 1 RevATT 4 Fwd-40RL 2 RevCat 5e TIA-40RL 3 Rev-50RL 4 Rev-50-60 Cat 5e TIA-60-701 10 100 10001 10 100 1000F, MHzF, MHzNEXT, dBRL, dBELFEXT, dBAttn, dBCat5e Channel ...

Informations

• Publié par: Nuching
• Nombre de lectures: 7
• Langue: English

Extrait

Copper Cabling Performance

•

•

•

•

•

•

Cat5 Installed base performance

Cat5e performance

Cat6 performance

Noise immunity for applications

Alien NEXT and ELFEXT

Extended Frequency Performance

• •

• •

•

Cat5 Installed Base

Component performance specified for NEXT, Insertion Loss, and Return Loss Channel performance not field verified, Cabling measurement specifications (TIA TSB-67) came later. After the fact, Channel Return Loss and ELFEXT were specified in TIA TSB-95. During this time, connector design was not well understood, so cabling installed performance varied widely. Even so, many installed channels may meet Cat5e performance requirements (with a handwave).

0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 1 0 -10 -20 -30 -40 -50 -60 -70 1

Cat5 Channel Performance NEXT 12 NEXT Fwd ELFEXT 13 NEXT Fwd 0 2 1 3 4     N N E E X X T T         F F w w d d -10 -20 24 NEXT Fwd 34 NEXT Fwd -30 12 NEXT Rev -40 13 NEXT Rev -50 -60 14 NEXT Rev 23 NEXT Rev -70 24 NEXT Rev -80 34 NEXT Rev -90 Cat 5e TIA -100 10 100 1000  1 F, MHz Return Loss 0 RL 1 Fwd -10 RL 2 Fwd RL 3 Fwd -20 RL 4 Fwd RL 1 Rev -30 RL 2 Rev RL 3 Rev -40 RL 4 Rev -50 Cat 5e TIA -60 10 100 1000  1 F, MHz

10 100 F, MHz Attenuation

10 100 F, MHz

1000

12-1ELFEXT 13-1ELFEXT 14-1ELFEXT 23-2ELFEXT 24-2ELFEXT 34-3ELFEXT 12-2ELFEXT 13-3ELFEXT 14-4ELFEXT 23-3ELFEXT 24-4ELFEXT 34-4ELFEXT Cat 5e TIA

1000

ATT 1 Fwd ATT 2 Fwd ATT 3 Fwd ATT 4 Fwd Cat 5e TIA

0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 1 0 -10 -20 -30 -40 -50 -60 -70

1

Cat5e Channel Performance NEXT ELFEXT 12-1ELFEXT 13-1ELFEXT 0 14-1ELFEXT 12 NEXT Fw d 13 NEXT Fw d -10 23-2ELFEXT 14 NEXT Fw d -20 24-2ELFEXT 23 NEXT Fw d 34-3ELFEXT 24 NEXT Fw d -30 12-2ELFEXT - 34 NEXT Fw d 40 13-3ELFEXT 12 NEXT Rev 13 NEXT Rev -50 14-4ELFEXT 14 NEXT Rev -60 23-3ELFEXT 23 NEXT Rev -70 24-4ELFEXT 24 NEXT Rev 34 NEXT Rev -8 34-4ELFEXT Cat 5e TIA -9 0 0 Cat 5e TIA 1000 1 0 RL 1 Fwd RL 2 Fwd  -10 RL 3 Fwd  -20 RL 4 Fwd RL 1 Rev  -30 RL 2 Rev  -40 RL 3 Rev RL 4 Rev  -50 Cat 5e TIA -60 1000 1

10 100 F, MHz Return Loss

10 100 F, MHz

10 100 F, MHz Attenuation

10 100 F, MHz

1000

ATT 1 Fwd ATT 2 Fwd ATT 3 Fwd ATT 4 Fwd Cat 5e TIA

1000

0.00 -20.00 -40.00 -60.00 -80.00 -100.00 -120.00 1

0.00 -10.00 -20.00 -30.00 -40.00 -50.00 -60.00 -70.00

1

Cat6 Channel Performance NEXT 12 NEXT Fwd ELFEXT 12-1ELFEXT 1 1 3 4    N N E E X X T T         F F w w d d 0.00 13-1ELFEXT 23 NEXT Fwd -10.00 14-1ELFEXT    23-2ELFEXT 24 NEXT Fwd -20.00 34 NEXT Fwd -30.00 24-2ELFEXT 34-3ELFEXT 12 NEXT Rev -40.00 12-2ELFEXT 13 NEXT Rev -50.00 13-3ELFEXT 14 NEXT Rev -60.00 14-4ELFEXT 23 NEXT Rev -70.00 23-3ELFEXT 24 NEXT Rev -80.00 24-4ELFEXT 34 NEXT Rev -90.00 34-4ELFEXT TIA CH -100.00 TIA CH 10 100 1000  1

Return Loss

0.00 RL 1 Fwd -5.00 RL 2 Fwd -10.00 RL 3 Fwd -15.00 RL 4 Fwd -20.00 RL 1 Rev . RL 2 Rev -25 00 RL 3 Rev -30.00 RL 4 Rev 35.00 - TIA CH -40.00 -45.00 10 100 1000  1

10 100

Attenuation

10 100

1000

ATT 1 Fwd ATT 2 Fwd ATT 3 Fwd ATT 4 Fwd TIA CH

1000

• •

• •

Channel Performance

Channel performance for Cat5 and Cat5e was compared to Cat5e limits. Cat5 and 5e limits are only specified to 100 MHz. Limit lines beyond 100 MHz are for information only. Cat6 limits are specified to 250 MHz. Limit lines beyond 250 MHz are for information only. Cat5e and Cat6 Cabling is expected to conform to the specified requirements with some margin. This is commonly verified by field testing.

Cable Bundling and Alien Crosstalk

•

•

Category 5e

Category 6

•

•

Alien Crosstalk in Cat5e and Cat6 installations

Cat 5e Alien PSNEXT cable only spec Hybrid Cables)

35.3-15log(f/100)+3 dB -or- 38.3-15log(f/100) dB

Cat 6 Alien PSNEXT cable only spec Hybrid Cables)

41.1-15log(f/100) dB

( ( f f o o r r   B  Bu u n n d d l l e e d d     a a n n d

Both reverting to 65dB for PSNEXT values higher than 65dB

d    

•

•

• •

Alien Crosstalk in Cat5e and Cat6 installations

Real world installation on existing network

cables tightly bound with velcro straps

Cable of interest at center of bundle Bundle leading into ceiling on cable runway

cable under investigation

• • • • • •

Alien Crosstalk in Cat5e installation

24 Cat 5e cables Bound configuration Permanent links 6.8dB margin to cable spec 7.8dB to link spec 8.4dB margin to channel spec

• • • • • •

Alien Crosstalk in Cat6 installation

24 Cat 6 cables Bound configuration Permanent links 4.1dB margin to cabl spec 4.8dB to link spec 5.5dB margin to channel spec