Exfo CableSHARK P3 VF/DSL Cable Qualifier Instrukcja Użytkownika Strona 18
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Oceniono. / 5. Na podstawie oceny klientów
VF / DSL Cable Qualifier
6
Figure 2D – Asymmetric Nature of ADSL
There are actually 32 bins allocated for Upstream and up to 250 bins allocated for Downstream; 250 can
only be used with echo cancellation. For the most part, however, DMT implementations will use 218 bins for
Downstream. Guard bands that separate the POTS signals from the ADSL signals use some of the possible
carrier allocations. There is also a guard band between the upstream and downstream carriers.
Figure 2E – ADSL DMT
ADSL uses 256 amplitude modulated carriers. The dark bars represent a “snapshot” of the modulation at any one point in
time. The light bars represent the maximum modulation state amplitude available for each carrier frequency. Notice how at
higher frequencies there are fewer available positions due to the diminishing signal to noise ratio.
- 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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