Cable TV Measurements (Option K20) R&S FSL
1300.2519.12 2.48 E-11
The large diversity of TV standards based on PAL, SECAM und NTSC differ not only in the parameter
d
escribed above. Some other parameter are for example:
• number of picture lines and their duration
• form and group delay of the residual sideband filter
• parameters of the used AM / FM / NICAM modulations (e.g. modulation depth, frequency
deviation, symbol rate)
• channel width and frequency range of the channels (different from country to country)
• stereo and mono sound signals, stereo transmission type
Analog TV Measurement Examples
These measurements are set up to carry out single channel measurements of analog TV signals. The
settings for analog TV measurements are described in section Analog TV settings. The test setup for
the following measurement types is provided in section Analog TV test setup.
Spectrum measurement
Carriers measurement
Video Scope measurement
Vision Modulation measurement
Hum measurement
C/N measurement
CSO measurement
CTB measurement
Analog TV settings
The Cable TV Measurements option needs to know some of the parameters described in section
Analog TV Basics to perform correct measurements. It therefore stores these parameters in the so–
called "modulation standard". Refer to section Modulation standards for the creation and usage of a
modulation standard. Section Analog TV modulation standards contains the description of the
parameters that have to be characterized for an analog TV signal. The following list explains the
meaning of the parameters:
• Name: Choose an arbitrary name for the new modulation standard.
• Signal Type: If you want to characterize an analog TV signal, select Analog TV.
• TV Standard: The standard used to modulate the luminance information. Can be "B/G", "M",
"D/K" and so on.
• Sound System: Are one ore two sound carriers in use? What type of modulation is used for
each of them? What are their frequencies, relative to the vision carrier?
The selection "FM 5.5/ FM 5.742" for example specifies, that two frequency modulated sound
carriers are used. One is 5.5 MHz and is about 5.472 MHz above the vision carrier.
The values you can choose depend on the selected TV standard. Not all combinations are
allowed!
• Group Delay: What group delay shall the residual sideband filter have?
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