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VF Tests

Copper, VDSL2, ADSL2+, and IP Triple-Play Test Set 83

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 Ter mination 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,

3kHzFlat, D-FILTER or 15 kHz. For the ITU standard, the choices are:

NONE, PSOPHOMETRIC, P-NOTCHED, 3kHzFlat, 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.

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 266 267

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Exfo VDSL2 Manual de usuario Pagina 91