R&S FSL Cable TV Measurements (Option K20)
1300.2519.12 4.213 E-11
Short list of cable TV terms and abbreviations
Term or abbreviation Description
AM
Amplitude Modulation
Analog modulation technique where the carrier amplitude contains the
information.
bar line see VITS
DVB–C
Digital Video Broadcasting for Cable Systems
DVB–C uses single carrier QAM as modulation technique.
DVB–T
Digital Video Broadcasting Terrestrial
DVB–T uses OFDM as modulation technique.
NTSC
National Television System Committee
Technique for transmitting color information in analog TV systems. NTSC is
for example adopted by the USA, Canada and Japan.
OFDM
Orthogonal Frequency Division Multiplexing
Digital multicarrier modulation technique. OFDM is used in terrestrial TV
networks, e.g. DVB–T systems.
PAL
Phase Alternation Line
Technique for transmitting color information in analog TV systems used in
many European countries.
QAM
Quadrature Amplitude Modulation
Digital modulation technique, where both phase and amplitude carry
information.
SECAM
Système en Couleur avec Mémoire
Technique for transmitting color information in analog TV systems. SECAM
is adopted by France, countries of the Eastern block and most Arabic
countries.
VITS
Vertical Interval Test Signal
Line of a TV picture where a special test signal is transmitted. VITS lines
are used for in–service measurements (cf. Quiet Line, Bar Line). These
lines are invisible, i.e. they are located before the first or after the last visible
line of the TV picture.
Measurements
In this section, every measurement type is introduced by a short description and by a basic step–by–
step instruction. Also a list with all parameters that can be altered is presented.
Spectrum – analog TV
This measurement gives an overview of the active measurement channel. The spectrum is displayed as
a full screen trace. The following parameters can be set:
Parameter
channel number
The basic procedure is the following:
1. Press the MEAS key.
2. Press the Analog TV softkey.
3. Press the Spectrum softkey.
4. To adjust the input attenuator, press the Adjust Attenuation softkey.
5. Press the RUN key.
For a more detailed description of this measurement type refer to chapter "Advanced Measurement
Examples".
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