CableSHARK
P3
User Guide
87
8.2.2.1 Testing Cables with the Manual TDR
Figure 8.2.2.1A shows an example of a MANUAL TDR test result on a 2000-ft cable with an open cable end,
with the correct VOP setting and proper pulse width selected. The large pulse near 0 distance is the sent
pulse, the reflected pulse near 2000 ft is the reflection coming from the open end of the cable. The
CableSHARK will attempt to place the cursor at the bottom of the rising edge of the reflected pulse. The user
can choose to move the cursor or marker from where the CableSHARK has placed them.
Cursor position =
Marker position =
Cursor / Marker Delta =
0.0
1250.0
2500.0
5000.0
3750.0
ZOOM IN
VERT
MAIN
MENU
E
F
CHG
-1.000
-0.750
-0.500
-0.250
0.000
0.250
0.500
0.750
1.000
1998.7
0
1998.7
Pulse Width:
ft
ft
300 ns
ZOOM IN
HORIZ
SELECT
MARKER
MORE
AUTO
REPEAT
End of cable detected at 1998 ft. DBRL = 33.8+
Cursor position =
Press or to move cursor
(TIP - RING)
F
IGURE
8.2.2.1A
-
R
UNNING A
M
ANUAL
TDR
T
EST WITH THE
C
ABLE
E
ND
O
PEN
Typically any fault that produces a positive reflection indicates a high impedance. Some examples of high
impedance faults include end of cable, end of bridge tap, or an open circuit.
Figure 8.2.2.1B shows the MANUAL TDR test result on the same cable of Figure 8.2.2.1A with the cable end
shorted, with the same VOP setting and pulse width selected. Please note that the reflected pulse is of
opposite polarity to the sent pulse.
Summary of Contents for CableSHARK P3
Page 1: ......
Page 10: ...VF DSL Cable Qualifier viii...
Page 12: ...VF DSL Cable Qualifier x...
Page 26: ...VF DSL Cable Qualifier 14...
Page 36: ...VF DSL Cable Qualifier 24...
Page 64: ...VF DSL Cable Qualifier 52...
Page 80: ...VF DSL Cable Qualifier 68...
Page 184: ...VF DSL Cable Qualifier 172...
Page 192: ...VF DSL Cable Qualifier 180...
Page 224: ...VF DSL Cable Qualifier 212...
Page 228: ...VF DSL Cable Qualifier 216...
Page 262: ...VF DSL Cable Qualifier 250 CSA Loop 6 CSA Loop 7 CSA Loop 8 Extended CSA Loop 9...
Page 263: ...CableSHARK P3 User Guide 251 Extended CSA Loop 10 Mid CSA Loop 0 Mid CSA Loop 1 Mid CSA Loop 2...
Page 264: ...VF DSL Cable Qualifier 252 Mid CSA Loop 3 Mid CSA Loop 4 Mid CSA Loop 5 Mid CSA Loop 6...
Page 265: ...CableSHARK P3 User Guide 253 ANSI Loop 2 ANSI Loop 3 ANSI Loop 4 ANSI Loop 5...
Page 266: ...VF DSL Cable Qualifier 254 ANSI Loop 6 ANSI Loop 7 ANSI Loop 8 ANSI Loop 9...
Page 267: ...CableSHARK P3 User Guide 255 ANSI Loop 11 ANSI Loop 12 ANSI Loop 13 ANSI Loop 15...
Page 268: ...VF DSL Cable Qualifier 256...
Page 286: ...VF DSL Cable Qualifier 274...
Page 292: ...VF DSL Cable Qualifier 280...
Page 294: ...VF DSL Cable Qualifier 282...
Page 316: ...VF DSL Cable Qualifier 304...
Page 318: ...VF DSL Cable Qualifier 306...
Page 319: ...CableSHARK P3 User Guide 307 Notes...
Page 320: ...VF DSL Cable Qualifier 308...