Selecting Test Features
Adding Frequency Offset to the DSn Signal
Adding Frequency Offset to the DSn Signal
Description You can add frequency offset to the interface DSn SIGNAL at all rates. Frequency Offset can be added at preset ITU values or as User defined values in the range ±100 ppm. The preset values change with the SIGNAL rate chosen as shown:
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(1.544 Mb/s) | + 32 ppm | −32 ppm | |
2 Mb/s (E1) | + 50 ppm | −50 ppm | |
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34 Mb/s (E3) | + 20 ppm | −20 ppm | |
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(44.736 Mb/s) | + 20 ppm | −20 ppm | |
HOW TO: | 1 Choose the FREQUENCY OFFSET required. |
2If you choose USER OFFSET, you can set the frequency offset to be between
Select the field immediately below USER OFFSET and use
DECREASE DIGIT | , INCREASE DIGIT , |
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frequency offset. (The amount of frequency offset can be varied while measurements are taking place.)
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