EXFO CableSHARK P3 VF/DSL Cable Qualifier - Manual (Page 5)

CableSHARK P3 User Guide
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7.10 R ETURN L OSS ................................................................................................................ 61
7.11 SHDSL D ATA R ATE P REDICTION .................................................................................... 61
7.12 4 W IRE X TALK ................................................................................................................ 61
7.13 I SOLATION T EST OR S TRESS L EAKAGE T EST .................................................................... 62
7.14 ADSL A UTO T EST .......................................................................................................... 62
7.15 SHDSL A UTO T EST ....................................................................................................... 63
7.16 VF A UTO T EST ............................................................................................................... 64
7.17 G ROUND R ESISTANCE T EST ........................................................................................... 65
7.18 R ESISTANCE F AULT L OCATOR (RFL) .............................................................................. 66
7.19 K-T EST .......................................................................................................................... 66
7.20 R INGER D ETECTION ....................................................................................................... 67
7.21 VF T ESTS ...................................................................................................................... 67
7.22 L OOP M APPER ™ T ESTS .................................................................................................. 67
SECTION 8 IN DEPTH GUIDE TO CABLE TESTING WITH THE CABLESHARK ............. 69
8.1 F REQUENCY R ESPONSE T ESTING ....................................................................................... 69
8.1.1 Setting up a Frequency Response Test ....................................................................... 69
8.1.2 Running a Frequency Response Test.......................................................................... 74
8.1.3 Examples of Frequency Response Test Results ......................................................... 76
8.2 T IME D OMAIN R EFLECTOMETRY T ESTING ............................................................................ 77
8.2.1 Setting up a TDR Test .................................................................................................. 77
8.2.2 Manual TDR Testing ................................................................................................ 83
8.2.2.1 Testing Cables with the Manual TDR ................................................................................ 87
8.2.3 Auto TDR Testing ......................................................................................................... 89
8.2.4 TDR Application Hints .................................................................................................. 90
8.2.4.1 Blind Spots ........................................................................................................................ 90
8.2.4.2 Pulse Width ....................................................................................................................... 90
8.2.4.3 Reflection polarity .............................................................................................................. 91
8.2.4.4 Detecting Load Coils ......................................................................................................... 91
8.2.4.5 Test from Both Ends of the Cable...................................................................................... 91
8.2.4.6 How to Determine the VOP of a Cable .............................................................................. 92
8.3 ADSL D ATA R ATE P REDICTION (ADSL, ADSL2, ADSL2+) M EASUREMENTS ....................... 93
8.3.1 Setting up a DMT Test.................................................................................................. 93
8.3.2 Running an ADSL Test ................................................................................................. 98
8.3.3 ADSL2 and ADSL2+ Data Rate Prediction ................................................................ 101
Example of a ADSL2 ATU-C (downstream) mask (non-overlapped spectrum) ............................... 103
Example of a ADSL2 ATU-R (downstream) mask (non-overlapped spectrum) ............................... 103
Example of a ADSL2+ ATU-C (downstream) mask (non-overlapped spectrum) ............................. 104
Example of a ADSL2+ ATU-R (downstream) mask (non-overlapped spectrum) ............................. 104
8.3.4 CPE Modem Detection and DSLAM Detection .......................................................... 105
8.3.5 DMT Test Application Hints ........................................................................................ 106