8-43
Performance Tests
FSK Deviation Accuracy Performance Test (Option 1EP Only)
Measure FSK Deviation
1. Set the 8648 frequencies and FSK modes shown in Table 8-2.
2. Set the 89441A symbol rate and frequency span as shown in the table.
3. Restart the measurement, press: Measure Restart.
4. Read the FSK deviation value at each symbol by using the marker function, press:
Marker, 0 (or 1, 2... 9), sym.
5. record the marker value in the second column of the table.
6. Calculate the deviation error for each symbol by subtracting the desired deviation value
from each marker value. Record them in the fourth column of the table.
7. Calculate the deviation error average and record it in the table.
8. Repeat this measurement for the rest of the carrier frequencies and FSK modes listed
in Table 8-2.
9. Record the test results and compare the results to the limits in the test record.
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