Exfo CableSHARK P3 VF/DSL Cable Qualifier Manual de usuario Pagina 249
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CableSHARK P3 User Guide
237
Section 16 K-Test
16.1 K-Test
The K-test or Kupfmuller test can be used to find the approximate distance to a resistance fault when both
wires in a single pair are faulted at the same place and a separate good pair is not available (see RFL Test).
T
R
GND
Faulty wire
R1
R2
Faulty wire
Reference wire
NOTE: R1 and R2 are faulted resistances
FIGURE 16.1A – SHORT BETWEEN TIP AND RING TO GROUND
Additional requirements for use of this test are as follows (but don’t worry, the CableSHARK will also look for
these and make the decision for you):
• One fault must be at least twice as “heavy” as the other fault (e.g., 5kΩ is twice as “heavy” as 10kΩ).
I.e. R1 > 2 x R2 or R2 > 2 x R1
• The sum of both faults must be at least 100 times the loop resistance (for instance, if the loop resistance
is 50W, the “lighter” fault must be 5kW or greater). I.e. R1 + R2 > 100 * Loop resistance
16.2 Setting up a K-test
16.2.1 Disconnecting the Station Battery and the Customer
Before a K-test can take place, the circuit that is to be tested must be disconnected from the CO station
battery and from the customer. The K-test is an end-to-end test meaning that the CableSHARK is placed at
one end of the circuit (typically on the CO side of the circuit) and a strap is placed on the customer side of
the circuit.
- CableSHARK P3 3
- VF / DSL Cable Qualifier 10
- Patent Information 11
- 1.2 Unpacking the CableSHARK 13
- 1000 ft (300 m) 22
- 4.1.1 The Front Panel 27
- 4.1.2 The Rear Panel 29
- 4.2 Powering the CableSHARK 33
- 5.1.1 Self Tests 37
- 5.2.2 Single-Ended Testing 39
- 5.2.3 End-to-End Testing 40
- 5.3.1 Saving Results 41
- 5.3.2 Recalling Results 43
- 5.4 Reference Masks 45
- 5.6 Bandwidth Requirements 50
- Section 6 Main Menu 51
- 6.2 Responder Mode 58
- 6.3 Recall Results 59
- 6.4 The System Setup Menu 59
- 7.2.1 Automatic TDR Test 65
- 7.2.2 Manual TDR Test 66
- 7.3 Frequency Response Tests 67
- 7.4.2 End-to-End DMT Test 69
- 7.5 Noise Tests 70
- 7.7 Load Coil Detection Test 71
- 7.8 Spectral Detective 72
- 7.10 Return Loss 73
- 7.12 4 Wire Xtalk 73
- 7.14 ADSL Auto Test 74
- 7.15 SHDSL Auto Test 75
- 7.16 VF Auto Test 76
- 7.17 Ground Resistance Test 77
- 7.19 K-Test 78
- 7.20 Ringer Detection 79
- 7.21 VF Tests 79
- 7.22 LoopMapper™ Tests 79
- CableSHARK 81
- FREQUENCY RESPONSE TEST SETUP 84
- 8.2.1 Setting up a TDR Test 89
- 8.2.2 Manual TDR Testing 95
- 8.2.3 Auto TDR Testing 101
- 8.2.4 TDR Application Hints 102
- CableSHARK P3 User Guide 103
- 8.3.1 Setting up a DMT Test 105
- DMT BITS PER 107
- (m/μS): 108
- 8.3.2 Running an ADSL Test 110
- DMT TEST RESULT 114
- 8.4..Noise Measurements 118
- 8.4.2 Running a Noise Test 124
- 00:00:00 125
- TO MEM 130
- TO USB 135
- 8.7.1 Setting up a DMM Test 142
- 8.7.2 Running a DMM Test 148
- 8.8.. 4-Wire Crosstalk Test 151
- 17.3 kHz to 2.208 MHz) 155
- > 100 M 157
- 8.10 LoopMapper™ 159
- 8.10.2 LoopMapper Testing 161
- 8.11.1 Auto Test Setup 168
- IGURE 8.11.1.3C – PHONE BOOK 174
- Central Office 185
- Customer 185
- IGURE 9.2D – ADSL AT CO SIDE 191
- 11.1..Running a SHDSL Test 199
- IGURE 12.1C – BATTERY CROSS 201
- IGURE 12.1.1.3A – RFL CABLE 203
- Black Red Green 204
- Yel low Blue Green 204
- Black Red Gnd 208
- 12.2 Running a RFL Test 210
- 12.3 RFL Hints 212
- + [ 0.0022 * ( T 213
- - 68°F ) * R 213
- - 20°C ) * 0.00393 * R 214
- Line card = not detected 222
- 15.1.3 Sending 3 Tone Slope 233
- 15.2.3 RX 3 Tone Slope 240
- 15.3 Noise Test 243
- 15.4 Impulse Noise Test 245
- 00:09:12 246
- 15.5 Power Influence 247
- SAVE/UPLOAD button 248
- 16.2 Setting up a K-test 249
- 16.3 Running the K-test 250
- 16.3.3 Running a Test 256
- A.1 Loop Topologies 259
- A.2 Attenuation Responses 261
- Transmitter Characteristics 272
- Transmitter Functions 272
- ± 50 ppm 275
- ± 1.0 dB typical 275
- ± 0.5 dB 277
- SHDSL Data Rate Test 278
- PSD Noise Measurement 278
- Longitudinal Balance Test 279
- DMM (Digital Multimeter) 279
- Isolation resistance 280
- Spectral Detective 280
- 4-Wire Crosstalk 280
- Visi-SHARK 282
- Appendix D Safety 283
- Appendix E Warranty 287
- Certification 288
- F.1 Software Policy 289
- F.2 Upgrading Software 289
- J.1 Installing the Software 295
- J.3.1 Running Visi-SHARK 296
- IGURE J.4.2B – SOCKET ERROR 301
- J.6.1 File Menu 305
- J.6.2 Screen Image menu 307
- J.6.3 New Connection Menu 310
- J.6.4 View Menu 311
- J.6.5 Window Menu 311
- Telecom Test and Measurement 321
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