VF / DSL Cable Qualifier
110
EDIT /
SELECT
MAIN
MENU
Test Type :
Term Impedance :
Termination:
Noise Filter :
Imp Nse Threshold:
Plot Interval:
Meas Time (Hour):
Measurement Units:
100 OHMS
TERMINATED
NO FILTER
43
dBm
1 Minute
1
E
F
CHG
IMPULSE HISTOGRAM
WARNING
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
-
F
IGURE
8.4.1D
–
I
MPULSE
H
ISTOGRAM
T
EST
S
ETUP
M
ENU
The NOISE TEST SETUP Menu has several options that appear at the upper part of the screen (see the
previous illustration). The parameters can be modified to customize a noise test. The noise test setup
options are described as follows:
TEST TYPE:
Select from NOISE PSD Next/Fext 2.2 MHz, NOISE PSD Next/Fext 6.0MHz,
IMPULSE NOISE and IMPULSE HISTOGRAM.
The PSD NOISE test measures the PSD noise energy and displays the result in
terms of dBm/Hz. For this test, no test signal is impressed onto the line under
test. The background cable signal is converted to a RMS voltage reading.
For Impulse Noise, no test signal is impressed onto the line under test. The
background cable signal is analyzed for a predetermined time to count the
number of noise spikes higher than the user selected threshold.
For Impulse Histogram, the CableSHARK plots impulse noise spikes over a user
definable time period.
TERM IMP:
The CableSHARK's impedance needs to match the characteristic impedance of
the cable. This causes the CableSHARK at either end of a test (including Single
Summary of Contents for CableSHARK P3
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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...
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