Vf noise – EXFO VDSL2 User Manual
Page 80
DMM Tests
72
AXS-200/635
DMM
VF Noise
The VF Noise test allows you to
measure the amount of unwanted or
disturbing energy introduced into a
loop from man-made and natural
sources.
Each parameter is described below.
³
Termination is either BRIDGING if
the unit uses high bridging
impedance when the cable is
active or terminated by other external equipment, or TERMINATED if
the unit uses normal test impedance termination.
³
Noise Filter is either PSOPHOMETRIC for ITU standard or C-MESSAGE
for ANSI standard.
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.