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Performance Tests
SDH Transmit/Receive Jitter Amplitude Accuracy
Figure 3-10 Carrier to Sideband Ratio Example
NOTE Compensate the measurement if necessary to balance any difference between the
upper and lower sideband amplitudes.
NOTE To optimize amplitude for checking the Receiver Accuracy it may be necessary to use
an external modulation source to give better amplitude resolution. Set the HP
37718A to accept an External modulation source and set the synthesizer to the same
jitter frequency as used for Internal modulation. Adjust the level from minimium
until the Carrier/Sideband amplitude is within 0.10 dB of the required difference.
14 Set the Calibration Pattern to OFF. Check that there are no SDH errors.
15 Select . Press RUN to start measurement.
Check the TX Jitter UI p-p setting is between 0.06 and 0.14 UI p-p
Check the RX Jitter results are between 0.043 and 0.157 UI p-p.
NOTE If using Multiple Display window ensure RESULTS display is selected before
running measurement.
RESULTS
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