User Manual

CableSHARK P3 User Guide
iii
7.10
RETURN LOSS................................................................................................................ 61
7.11 SHDSL DATA RATE PREDICTION.................................................................................... 61
7.12 4 WIRE XTALK................................................................................................................ 61
7.13 ISOLATION TEST OR STRESS LEAKAGE TEST.................................................................... 62
7.14 ADSL AUTO TEST.......................................................................................................... 62
7.15 SHDSL AUTO TEST ....................................................................................................... 63
7.16 VF AUTO TEST............................................................................................................... 64
7.17 GROUND RESISTANCE TEST ........................................................................................... 65
7.18 RESISTANCE FAULT LOCATOR (RFL) .............................................................................. 66
7.19 K-TEST.......................................................................................................................... 66
7.20 RINGER DETECTION ....................................................................................................... 67
7.21 VF TESTS ...................................................................................................................... 67
7.22 LOOPMAPPER™ TESTS.................................................................................................. 67
SECTION 8 IN DEPTH GUIDE TO CABLE TESTING WITH THE CABLESHARK .............69
8.1 FREQUENCY RESPONSE TESTING ....................................................................................... 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 TIME DOMAIN REFLECTOMETRY TESTING ............................................................................ 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 DATA RATE PREDICTION (ADSL, ADSL2, ADSL2+) MEASUREMENTS....................... 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