Noise Tests
Copper and G.fast/VDSL2/ADSL2+ Multi-play Test Set 185
WB PSD Noise
Termination Resistance allows you to select the resistance of the
dummy load connected to the line, unless HiZ Cable is selected above.
Mask allows you to select a network representing the power signal of
other services, overlaid on the active noise graph, to identify its
presence on the line under test. All of the masks you enabled from the
Select Masks tab are listed here for test selection.
Threshold Settings button opens a new page that allows you to set the
RMS Noise Threshold parameters for the test.
Select Graph button changes to Graph Selected when pressed and
opens a new selection of function keys which allow you to maneuver
the graph as follows:
Cursor - press the left/right arrow keys to decrease/increase the
values by moving the cursor. Press and hold the left/right arrow
keys to accelerate the cursor. Press to recall the cursor and
place it in the middle of the current x-axis limits.
Zoom references the middle of the x/y axis and not the cursor
position. Press the arrow keys as follows:
Right = x-axis zoom in.
Left = x-axis zoom out.
Up = y-axis zoom in.
Down = y-axis zoom out.
Pan - use left/right arrow keys to pan the x-axis and the up/down
arrow keys to pan the y-axis.
1:1 resets the x-axis and y-axis limits to full scale.
Return To Test removes these function keys and displays the
previous ones.
Peak ON/OFF allows you to measure the current PSD noise value,
compare it against the peak value at each given frequency, and display
the maximum value. Select either Peak ON or Peak OFF.
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