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Using Category 5/5E/6 for Audio and Video Applications

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Using Category 5/5E/6 for Audio and Video Applications Using Category 5/5e/6 for Audio and Video Applications Steve Lampen Multimedia Technology Manager Belden ©2007,©2007, Belden Belden. All rights All rights reserved. reserved. How Do We Compare? Can you use Cat 5/5e/6 for non data applications? • What applications? • What performance requirements? • Compare to TIA/EIA568-B.2 standard ©2007, Belden. All rights reserved. Table 1 – Audio Applications Application Format Cable Type Spec End-User Unbalanced Single-conductor shielded N/A Consumer Analog audio Balanced Shielded twisted-pair N/A Professional S/PDIF Consumer Unbalanced Coaxial cable Digital audio AES3-id Professional Balanced Shielded twisted-pair AES3 ©2007, Belden. All rights reserved. Table 2 – Video Applications Application Format Cable Type Spec End-User Surveillance Consumer Analog video Home video Coaxial cable Broadcast Professional Digital video Unbalanced SDI (601) S-video (dual) Y-C Pro-Sumer Analog video RGB Component Professional VGA Coaxial cable Broadband Consumer ©2007, Belden. All rights reserved. How Does a Balanced Line Work? + – ©2007, Belden. All rights reserved. How Does a Balanced Line Work? + – ©2007, Belden. All rights reserved. How Does a Balanced Line Work? + – ©2007, Belden. All rights reserved. How Does a Balanced Line Work? + – ©2007, Belden. All rights reserved. How Does a Balanced Line Work? ©2007, Belden. All rights reserved. How Does a Balanced Line Work? ©2007, Belden. All rights reserved. A Perfect Balanced Line Requirement Variations in Cable Parameter Measured in Spacing Impedance Return Loss Decibels (dB) Capacitance Capacitance Picofarads (pF) Unbalance Size Resistance Resistance Ohms (Ω) Unbalance Length Resistance Resistance Ohms (Ω) Unbalance Timing Phase Degrees ( ) “A balanced line is one where each of the two conductors, and all passive pieces attached to each conductor, are the same impedance in reference to ground.” Bill Whitlock, Jensen Transformers ©2007, Belden. All rights reserved. An Unbalanced Line • Conductors aren‟t the same size. • Conductors aren‟t the same length. • Conductors aren‟t close together. ©2007, Belden. All rights reserved. Consumer Analog Audio System Specs Category 5 Category 5e Category 6 Format Unbalanced Balanced Balanced Balanced Capacitance 30pF/ft. 15 pF/ft. 15 pF/ft. 15 pF/ft. 98 pF/m 49pF/m 49pF/m 49pF/m Impedance N/A 100Ω 100Ω 100Ω Gage 22/24 AWG (?) 24 AWG 24 AWG 23 AWG Shield YES NO NO NO ©2007, Belden. All rights reserved. How Far Can You Go? -1 dB @ 20 kHz Source 15 pF/ft. 20 pF/ft. 30 pF/ft. 50 pF/ft. Impedance (49 pF/m) (66 pF/m) (98 pF/m) (164 pF/m) 50 Ω 5406 ft. 4055 ft. 2703 ft. 1622 ft. 1648m 1236m 824m 495m 100 Ω 2707 ft. 2030 ft 1353 ft. 812 ft. 825m 619m 413m 248m 150 Ω 1873 ft. 1352 ft. 901 ft 541 ft 571m 412m 275m 165m 600 Ω 451 ft. 338 ft. 225 ft. 135 ft. 138m 103m 68.6m 41.2m 1 kΩ 271 ft. 203 ft. 135 ft 81 ft. 82.6m 61.9m 41.2m 24.7m 10 kΩ 27 ft. 20 ft 14 ft. 8 ft. 8.2m 6.1m 4.3m 2.4m 50 kΩ 5.4 ft. 4 ft. 2.7 ft. 1.6 ft. 165cm 122cm 82cm 49cm ©2007, Belden. All rights reserved. Balanced Analog Audio System Specs Category 5 Category 5e Category 6 Format Balanced Balanced Balanced Balanced 30pF/ft. 15 pF/ft. 15 pF/ft. 15 pF/ft. Capacitance 98 pF/m 49pF/m 49pF/m 49pF/m Impedance N/A 100Ω 100Ω 100Ω Gage 22-24 AWG 24 AWG 24 AWG 23 AWG Shield YES NO NO NO ©2007, Belden. All rights reserved. ©2007, Belden. All reservedrights All Belden. ©2007, Analog Audio Audio FEXT Analog in UTP 1752A FEXT Average -85 1000 1000 1000 1000 2000 2000 2000 2000 3000 3000 4000 4000 4000 4000 6000 7000 8000 8000 9000 10000 13000 14000 16000 18000 20000 24000 27000 30000 35000 39000 45000 -90 . -95 -100 Series2 dB -105 -110 -115 Frequency ©2007, Belden. All reservedrights All Belden. ©2007, Analog Audio Audio NEXT Analog in UTP 1752A NEXT AVERAGE -85 1000 1317 1634 1951 2212 2462 2712 2962 3306 3667 4043 4609 5174 5739 6412 7200 8042 8583 9300 11333 13125 14857 16833 18000 20600 24400 27667 30667 35400 40200 45500 -90 . -95 -100 dB Series1 -105 -110 -115 Frequency Balanced Pairs and Shielding • Ground Loops. – Shields can become „antennas‟. • Feed noise into the pair • Not protecting the pair from noise. • With UTP we „fixed the pair‟. – As symmetrical as possible. – As balanced as possible • No shielding to fall back on. • And now “InstaSnake” ©2007, Belden. All rights reserved. Analog Audio and MediaTwist ©2007, Belden. All rights reserved. AES3-id Professional Coax System Specs Category 5 Category 5e Category 6 Format Unbalanced Balanced Balanced Balanced Capacitance 20pF/ft. 15 pF/ft. 15 pF/ft. 15 pF/ft. 66pF/m 49pF/m 49pF/m 49pF/m Impedance 75Ω 100Ω 100Ω 100Ω Gage 20-24 AWG 24 AWG 24 AWG 23 AWG Shield YES NO NO NO Crosstalk -30 dB (?) -47.6 dB -50.6 dB -60.6 dB 6 MHz (48 kHz) PSNEXT PSNEXT PSNEXT Crosstalk -30 dB (?) -41.4 dB -41.4 dB -51.4 dB 25 MHz (192 kHz) PSNEXT PSNEXT PSNEXT Crosstalk -30 dB (?) -37.6 dB -37.6 dB -47 dB 50 MHz (384 kHz) PSNEXT PSNEXT PSNEXT ©2007, Belden. All rights reserved. What is Good CMRR? •Based on frequency SSL Mic Input Mackie 50 Hz >115 dB 1 kHz >100 dB Mic Input 10 kHz >70 dB 50 Hz >70 dB Line Input 1 kHz >70 dB 10 kHz >60 dB 50 Hz >90 dB 1 kHz >100 dB 10 kHz >50 dB ©2007, Belden. All rights reserved. What is Good CMRR? CMR of pre-amp A (GL2800) dBu -1.93 -20.00 Gain Setting 60dB 50dB -40.00 40dB 30dB -60.00 20dB 10dB -80.00 -100.00 10.00 Hz 100.00 1000.00 10000.00 30000.00 Allen & Heath GL2800 Mixer ©2007, Belden. All rights reserved. Digital Audio Sampling Rate To Determine Actual Bandwidth Bandwidth 44.1 kHz x128 5.6448 MHz 48 kHz x128 6.144 MHz 88.2 kHz x128 11.2896 MHz 96 kHz x128 12.288 MHz 176.4 kHz x128 22.5792 MHz 192 kHz X128 24.576 MHz AES5 proposed X-140 “SuperMAC” uses Category 5, 5e, 6, „7‟ ©2007, Belden. All rights reserved. S/PDIF Consumer Coax 44.1 kHz x128 = 5.6448 MHz (6 MHz) System Specs Category 5 Category 5e Category 6 Format Unbalanced Balanced Balanced Balanced Capacitance 20pF/ft. 15 pF/ft. 15 pF/ft. 15 pF/ft. 66pF/m 49pF/m 49pF/m 49pF/m Impedance 75Ω 100Ω 100Ω 100Ω Gage 23-24 AWG 24 AWG 24 AWG 23 AWG Shield YES NO NO NO Crosstalk -30 dB (?) -47.6 dB -50.6 dB -60.6 dB 6 MHz PSNEXT PSNEXT PSNEXT ©2007, Belden. All rights reserved. Balanced AES System Specs Category 5 Category 5e Category 6 Format Balanced Balanced Balanced Balanced Capacitance 13pF/ft. 15 pF/ft. 15 pF/ft. 15 pF/ft. 43pF/m 49pF/m 49pF/m 49pF/m Impedance 110Ω 20% 100Ω 15Ω 100Ω 15Ω 100Ω 15Ω Gage 24 AWG 24 AWG 24 AWG 23 AWG Shield YES NO NO NO Crosstalk -30 dB (?) -47.6 dB -50.6 dB -60.6 dB 6 MHz (48 kHz) PSNEXT PSNEXT PSNEXT Crosstalk -30 dB (?) -41.4 dB -41.4 dB -51.4 dB 25 MHz (192 kHz) PSNEXT PSNEXT PSNEXT Crosstalk -30 dB (?) -37.6 dB -37.6 dB -47 dB 50 MHz (384 kHz) PSNEXT PSNEXT PSNEXT ©2007, Belden. All rights reserved. Four, Three, Two, One-Pair • Four pair standard –3 pair (RGB) waste a pair • Two pair standard • One pair?? –Belden 1353A ©2007, Belden. All rights reserved. Analog Baseband Video System Specs Category 5 Category 5e Category 6 Format Unbalanced Balanced Balanced Balanced Capacitance 20pF/ft. 15 pF/ft. 15 pF/ft. 15 pF/ft. 77pF/m 49pF/m 49pF/m 49pF/m Impedance 75Ω 100Ω 100Ω 100Ω Gage 20-23 AWG 24 AWG 24 AWG 23 AWG Shield YES NO NO NO Crosstalk -60 dB (?) -53 dB -53 dB -63 dB 4.2 MHz PSNEXT PSNEXT PSNEXT www.belden.com “Video and UTP” ©2007, Belden. All rights reserved. Analog Video Crosstalk • Crosstalk never considered – Coax cables are shielded – Cables are random • -100 dB to –120 dB shield effectiveness • So with UTP and analog video – What crosstalk for multiple video? – Suggested: -60 dB Video Application Suggested Crosstalk Surveillance -40 dB Standard home video -50 dB Professional analog video -60 dB • A new twist with UTP: “CCTP” ©2007, Belden. All rights reserved. S-Video, S-VHS™, Y-C System Specs Category 5 Category 5e Category 6 Format Unbalanced Balanced Balanced Balanced Capacitance 17 pF/ft. 15 pF/ft. 15 pF/ft 15 pF/ft. 56 pF/m 49 pF/m 49 pF/m 49 pF/m Impedance 75Ω (?) 100Ω 100Ω 100Ω Gage 30 AWG 24 AWG 24 AWG 24 AWG Shield YES NO NO NO Crosstalk -60 dB (?) -53 dB -53 dB -63 dB 4.2 MHz PSNEXT PSNEXT PSNEXT Timing 40 nsec (?) 45 nsec 45 nsec 45 nsec (Delay Skew) (292 ft., 89m) (292 ft., 89m) (292 ft., 89m) ©2007, Belden. All rights reserved. RGB Component Video System Specs Category 5 Category 5e Category 6 Format Unbalanced Balanced Balanced Balanced Capacitance 16 pF/ft. 15 pF/ft. 15 pF/ft. 15 pF/ft. 54 pF/m 49 pF/m 49 pF/m 49 pF/m Impedance 75Ω 100Ω 15Ω 100Ω 15Ω 100Ω 15Ω Gage Wide range 24 AWG 24 AWG 24 AWG Shield YES NO NO NO Crosstalk -60 dB (?) -44.3 dB -47.3 dB -57.3 dB 10 MHz PSNEXT PSNEXT PSNEXT Timing 40 nsec 45 nsec 45 nsec 45 nsec Delay Skew (292 ft., 89m) (292 ft., 89m) (292 ft., 89m) ©2007, Belden.
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