EXFO CableSHARK P3 VF/DSL Cable Qualifier - Manual (Page 153)

CableSHARK P3 User Guide
141
8.8.2 Running a 4-Wire Crosstalk Test
Use caution when connecting the test set, as telephone cables may have dangerous A.C. or D.C.
voltages on them.
Press the function button corresponding to the RUN / STOP button on the front of the CableSHARK to
initiate the test. Figure 8.8.2A shows an example of the results obtained from a 4 Wire Crosstalk Test.
Test completed.
MAIN
MENU
E F CHG
ZOOM IN
HORZ
17 565 1113 2208 kHz 1660
dB
0.0
20.0
40.0
60.0
80.0
SHOW
REF
TEST
SETUP ZOOM IN
VERT
SAVE/
UPLOAD
Press or to move cursor
Impedance
Cursor position = 72.4 dB
= 1112.625 kHz
0.0
20.0
40.0
60.0
80.0
F IGURE 8.8.2A - R ESULTS OF 4 W IRE C ROSSTALK T EST
At the completion of a test, the Function button command selection at the bottom of the 4 WIRE XTALK
RESULT screen consists of a minimum of five options available to the operator. The following are brief
descriptions of each of the Function button options:
SHOW REF Pressing the function button corresponding to SHOW REF allows a user to
overlay a REFERENCE MASK over the test result on screen to compare the
two. See Section 5.4 for more information about the REFERENCE MASK
feature.