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990DSL
Users Guide
Impulse Noise Test
The Impulse Noise test is a single-ended test that enables wideband noise
transients of specified amplitude to be counted and recorded over a user-
specified time. The results of this test can be particularly helpful for tracking
intermittent noise problems. Used in conjunction with the WB Noise / Level
test, the Impulse Noise test can help you pinpoint sources of external noise.
Setting Up an Impulse Noise Test
To set up an Impulse Noise test, follow the instructions under "Displaying a
Setup Menu" in Chapter 3. Refer to Table 5-6 for setup parameters.
Table 5-6. Impulse Noise Test Setup Parameters
Parameter
Termination Mode
Termination Impedance
Measurement Filter
Test Time Setting
Counter Threshold
Pass Threshold
Running an Impulse Noise Test
To run an Impulse Noise test, do the following:
1.
From the XDSL toolbox, select
2.
Press K to start the test.
The CopperPro begins counting noise transients that exceed the
level in Setups.
Threshold
5-32
Setting (default in bold)
Terminated or Bridged
135 e or 100 e
No or E (ISDN BR), F (HDSL), G (ADSL)
15 minutes (Range = 1 to 1440 minutes)
> -40 dBm
(Range = 0 to -40 dBm)
< 10 counts (Range = 0 to 999 counts)
Impulse Noise
and press L.
Counter
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