R&S FSL Cable TV Measurements (Option K20)
1300.2519.12 2.61 E-11
5. Press the MEAS key.
6. Press the Analog TV softkey.
7. Press the CSO softkey.
8. To change the limits, press the Edit Table softkey.
9. To adjust the input attenuator, press the Adjust Attenuation softkey.
10. Press the CSO Setup softkey to open the CSO Setup dialog box.
Make sure, that Off–Service is chosen as measurement mode.
Specify one or multiple spans for the beat measurements, as shown in the figure below. Change
the CF value, which denotes the middle of the span relative to the vision carrier and the Span
value in this table. The measurement ranges should be centered around frequencies where you
expect second order beats in your network.
If desired, activate the Noise Floor Correction option.
11. Press the RUN key.
12. Turn on the signal when prompted and confirm by pressing the ENTER key.
The R&S FSL will measure the carrier power. This is not visible on the screen.
13. Turn off the test transmitter or remove the cable when prompted and confirm by pressing the
ENTER key.
The R&S FSL will measure the beats by sweeping with a small resolution filter in the span specified
in the CSO Setup dialog box.
14. A marker is automatically set. Press the MKR key and, using the rotary knob, move the marker to
the frequency you want to measure the beats at. You should take care not to measure a CTB beat
instead of a CSO beat.
15. Activate all possible second order beat frequencies by pressing the Next Meas Frequency softkey
and then the RUN key. This measures beats in the next span, that is defined in the CSO Setup
dialog box.
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