Cable TV Measurements (Option K20) R&S FSL
1300.2519.12 2.54 E-11
Test setup:
Refer to the section Analog TV test setup.
Procedure:
1. Press the MEAS key.
2
. Press the Analog TV softkey.
3. Press the More softkey.
4. Press the Vision Modulation softkey.
5. To change the limits, press the Edit Table softkey. A limit change in the lower two lines leads to a
change of the other limits, since the measurement results depend on each other.
6. To adjust input attenuator, press the Adjust Attenuation softkey.
7. Press the FREQ key.
8. Enter 210.25 MHz for the vision carrier frequency of the input signal.
9. Press the RUN key.
The upper pane shows the RF level of the vision carrier versus time in the "bar line''. The "bar line''
is a specific horizontal line, that holds a white reference. The number of this line is specified in the
modulation standard of the measured channel. To be more exactly: It is specified in the analog TV
default modulation standard, since no channel table is used right now.
If the input signal does not contain a white reference in the specified line, the results are not correct!
The lower pane shows the numeric results and whether they are within the limits or not.
Fig. 2-36 Vision Modulation measurement
To Next Page
Loading...
