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Description:
HOW TO:
NOT E
Test Setup Features
Adding Frequency Offset
Adding Frequency Offset
The capability of the network equipment to reliably recover the clock is tested by
varying the clock rate of the generated data and checking for errors.
The measurement can be made in a loopback or a cross multiplexer configuration,
and is generally of short duration.
Frequency Offset can only be added to the generated 2 Mb/s signal if Clock Source
is chosen.
Internal
Frequency Offset can be added at:
• Preset ITU values -
• User defined values in the range
1 First choose Clock Source
,
MENU
Test Setup
shown.
2 Choose the amount of Frequency offset required from the menu.
If you wish to add frequency offset at other than the preset values, use
,
and
to choose the amount of frequency offset.
Press
to action your edits or press
ENTER
The Frequency of the received signal and the Frequency Offset present on the
received signal are also displayed on the
and
+50ppm
-50ppm
±
100 ppm.
on the
Internal
,
,
to prepare to add Frequency Offset, as
Freq Offset
MENU
display. Then press
TX/RX Setup
to escape.
Cancel
,
,
Signal Quality
Freq
,
,
Edit
display.
5-3
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