VF Tests
Copper, VDSL2, ADSL2+, and IP Triple-Play Test Set
83
VF Noise
VF Noise
The
VF Noise
pane allows you to
configure and run a VF noise test. It
measures the amount of unwanted or
disturbing energy introduced into a
loop from man-made and natural
sources.
Each parameter is described below.
³
Termination
defines if the unit
uses normal test impedance
termination or high bridging impedance when the cable is active or
terminated by other external equipment. For normal test termination
select
TERMINATED
, otherwise select
BRIDGING
.
³
Noise Filter
defines the type of noise filtering to use. If ANSI standard is
used, the available choices are:
NONE
,
C-MESSAGE
,
C-NOTCHED
,
3 kHz Flat
,
D-FILTER
or
15 kHz
. For the ITU standard, the choices are:
NONE
,
PSOPHOMETRIC
,
P-NOTCHED
,
3 kHz Flat
,
D-FILTER
or
15 kHz
.
To start/stop the test:
1.
Press the up/down arrow keys to highlight the desired test parameter.
2.
Press
to open the list.
3.
Press the up/down arrow keys to highlight the desired value, then press
to select it.
4.
Select other parameters as required.
5.
Press
to start/stop the test.
Test results are displayed on the screen as they are completed.
