EXFO CableSHARK P3 VF/DSL Cable Qualifier - Manual (Page 89)

CableSHARK P3 User Guide
77
8.2 Time Domain Reflectometry Testing
Time Domain Reflectometry (TDR) allows the user of the CableSHARK to easily identify faults (if any) along
a given section of cable. Results can be displayed in feet, meters, or nanoseconds. This test is extremely
useful in locating bridge taps (multiple appearances) and the end of the cable. Faults such as opens, shorts,
splices, split pairs and wet sections can easily be found using a high quality TDR such as the CableSHARK’s
integrated TDR solution. See Section 3 for more details on Time Domain Reflectometry.
8.2.1 Setting up a TDR Test
From the Main Menu, pressing function button F1 (CABLE TESTS) will bring the user to the CABLE TESTS
pop-up menu. Choosing TDR from the pop-up menu (and subsequently Auto-Cable End, Auto-Bridge Tap,
Manual, or Manual-4 Wire) will invoke the TDR TEST SETUP menu. The sections that follow will explain the
operation as each of the control keys is pressed and their respective screens appear. Figure 8.2.1A below
shows the TDR Test Menu.
EDIT /
SELECT MAIN
MENU
Test Type:
Connection:
Cable Type:
VOP:
VOP (m/us):
Graph Scale:
Pulse Width (ns):
Pulse shape:
Vertical gain:
Horizontal Units:
Smoothing:
TIP - RING
24 AWG
660
198
FEET
Yes
5000 FT
1000
Square
0 dB ( 1X )
E F CHG
MANUAL
WARNING
Please ensure that the cable to be tested is open or
shorted at the far end.
Note: telephone cables may have dangerous A.C. or
D.C. voltages on them, therefore caution should be
taken when connecting this test set.
!
SELECT
NEXT
0.