Cable TV Measurements (Option K20) R&S FSL
1300.2519.12 2.72 E-11
Digital TV test setup
Perform all measurement examples in the Cable TV Analyzer mode.
Use a digital TV generator as signal source.
Connect the generator directly to the R&S FSL.
Set the TV generator to the following parameters:
center frequency = 100 MHz
single carrier 64QAM modulation.
root raised cosine transmit filter with a roll–off factor of 0.15.
symbol rate = 6.9 MSymbols/s.
This test setup is used throughout all digital TV measurement examples.
Spectrum measurement
This measurement gives an overview of the active measurement channel. All parameters are set
according to the modulation standard, referenced in the channel table or by the default digital TV
modulation standard. The spectrum is displayed in a full screen trace.
Test setup:
Refer to the section Digital TV test setup.
Procedure:
1. Press the FREQ key and enter 100 MHz for the center frequency.
2. Press the MEAS key.
3. Press the Digital TV softkey.
4. Press the Digital TV Settings softkey and compare the modulation parameters.
Fig. 2-51 Digital TV Settings dialog box
5. Press the Spectrum softkey.
6. To adjust the input attenuator, press the Adjust Attenuation softkey.
7. Press the RUN key.
To Next Page
Loading...
