R&S FSL Cable TV Measurements (Option K20)
1300.2519.12 4.215 E-11
5. To configure the measurement, press the C/N Setup softkey.
The C/N Setup dialog box is displayed.
– Under Measurement Method, activate one of the options. For details refer to the C/N Setup
softkey in the measurement menu.
– Only for In–Service and Off–Service measurement method: Under Measurement
Frequencies, enter the center frequencies and span values. Set the span values relative to the
vision carrier of the current measurement.
– In the Noise Reference Bandwidth field, enter a number in order to change the default value.
– If the DUT's noise is close to the noise of the spectrum analyzer, activate the Noise Floor
Correction option.
6. To change the limits, press the Edit Table softkey.
7. To activate the carrier measurement with the next sweep, press the Meas Carrier softkey.
Prerequisite is, that in the C/N Setup dialog box under Measurement Methods the Off–Service
option is selected.
8. To adjust the input attenuator, press the Adjust Attenuation softkey.
9. Press the RUN key.
10. Only for In–Service and Off–Service measurement method: To measure in the next frequency
span defined via the C/N setup, press the Next Meas Frequency softkey.
For a more detailed description of this measurement type refer to chapter "Advanced Measurement
Examples".
CSO – analog TV
This measurement determines the carrier–to–second order beat ratio (CSO). The measurement
consists of two sub–measurements: reference power measurement and beat measurement of second
order intermodulation products. The following parameters can be set:
Parameter
reference power
measurement method
(Off–Service, Quiet Line)
measurement frequencies
(CF, Span)
noise floor correction
limits
The basic procedure is the following:
1. Press the MEAS key.
2. Press the Analog TV softkey.
3. Press the CSO softkey.
4. To change the setting of the reference power:
– Press the Reference Power softkey.
– Press the Reference Channel, Same as Meas Channel, or Manual Reference Power softkey
and, if necessary, enter a value.
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