R&S FSL Cable TV Measurements (Option K20)
1300.2519.12 2.77 E-11
Parameter Description Definition
Phase Jitter (rms) Root mean square of phase jitter
in deg. An ideal IQ mixer results in
0 deg.
Test setup:
Refer to the section Digital TV test setup.
Procedure:
1. Press the MEAS key.
2. Press the Digital TV softkey.
3. Press the Modulation Analysis softkey.
4. Press the Modulation Errors softkey.
5. To magnify one parameter, press the Zoom softkey and activate the parameter. To go back to the
default setting, select None.
6. To change the limits, press the Edit Table softkey.
7. To adjust the input attenuator, press the Adjust Attenuation softkey.
8. Press the RUN key.
Fig. 2-55 Digital TV Modulation Errors measurement
9. To form the average over a defined number of sweeps:
Press the TRACE key.
Press the Result Mode softkey and select the Average trace mode.
Press the Sweep Count softkey and enter the number of sweeps used for averaging.
Every result parameter in the table is averaged by a suitable averaging method over the
number of sweeps set.
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