Cable TV Measurements (Option K20) R&S FSL
1300.2519.12 4.216 E-11
5. To configure the measurement, press the CSO Setup softkey.
The CSO Setup dialog box is displayed.
– Under Measurement Method, activate one of the options. For details refer to the CSO Setup
softkey in the measurement menu.
– Only for Off–Service measurement method: Under Measurement Frequencies, enter the
center frequencies and span values.
– 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 CSO 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 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 chapter "Advanced Measurement
Examples".
CTB – analog TV
This measurement determines the carrier–to–composite triple beat ratio (CTB). The measurement
consists of two sub–measurements: reference power measurement and beat measurement of third
order intermodulation products. The following parameters can be set:
Parameter
reference power
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 CTB 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.
5. To configure the measurement, press the CTB Setup softkey.
The CTB Setup dialog box is displayed.
– Under Measurement Frequencies, enter the center frequencies and span values.
– If the DUT's noise is close to the noise of the spectrum analyzer, activate the Noise Floor
Correction option.
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