EXFO VDSL2 - Manual (Page 92)

VF Tests
84 AXS-200/635
Impulse Noise
Impulse Noise
The impulse noise test allows you to measure impulse noise on the circuit
under test.
Test Setup
The Test Setup tab allows you to configure parameters for the impulse
noise test.
Each parameter on the pane 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 in use. If ANSI standard is
used, the available choices are: NONE, C-MESSAGE, C NOTCHED, or
D-FILTER. For the ITU standard, the choices are: NONE,
PSOPHOMETRIC, P-NOTCHED, or D-FILTER
³
Low Threshold (dBm) defines the low threshold limits for the impulse
noise test. Specify a value between -40 and 0.
³
Separation (dB) defines the level difference between the low, mid
and high thresholds. Specify a value between 1 and 6 dB.
³
Imp. Noise Measure. Time defines the duration of the impulse noise
test. The available choices are: 1, 5, 10, 15, 60 Minutes, or 24 Hours.