Chapter 5: TOOLS
172
October 2021
The Shoulders Attenuation function measures interferences in adjacent channels
that look like shoulders.
Broadcast signals such as DVB-T, DVB-T2, ISDB-T or ATSC are constructed to
follow strict RF requirements mostly aimed to ensure they occupy the bandwidth
they have been assigned and they do not interfere with any other adjacent
channels. In particular the shape of the signal spectrum must be within the limits
of certain given masks specified in the different corresponding standards, i.e.
ETR290 recommendations for DVB-T. The specific masks depend on the type of
signal and standard.
Due mainly to nonlinearities in the power amplifiers the output RF signal
contains unwanted band limit and out of band components, the shape of which
has given rise to the term “shoulder”, that tend to compromise the compliance
with the mask limits..
Shoulders attenuation tool is available for digital terrestrial signals.
1
Shoulder attenuation should be measured at the output of the power
amplifier right before sending the signal to the antenna through the net of
passive devices. Because of the power level typically available at that point
it is mandatory to use external power attenuators so that the level can be
adapted to the máximum accepted by the analyzer.
2
Connect the signal to be measured to the RF input and tune a digital channel
in terrestrial band.
3
Press the
Tools key.
4
Select the
Shoulders Attenuation
option and the
Shoulders Attenuation
screen shows up.
5.20
Shoulders Attenuation
5.20.1
Description
S
C
A
N
5.20.2
Operation
Summary of Contents for RANGER Neo 2
Page 1: ...RANGER Neo 2 TV AND SATELLITE ANALYZER 0 MI2130 RANGER Neo 3 RANGER Neo 4 ...
Page 20: ...Chapter 2 SETTING UP 8 October 2021 Figure 4 Side View ...
Page 21: ...October 2021 9 Chapter 2 SETTING UP Figure 5 Top View ...
Page 23: ...October 2021 11 Chapter 2 SETTING UP Figure 7 Side View ...
Page 24: ...Chapter 2 SETTING UP 12 October 2021 Figure 8 Top View ...
Page 26: ...Chapter 2 SETTING UP 14 October 2021 Figure 10 Side View ...
Page 27: ...October 2021 15 Chapter 2 SETTING UP Figure 11 Top View ...
Page 30: ...Chapter 2 SETTING UP 18 October 2021 RF Menu Figure 13 RF Tuning 2 7 Menu Tree ...
Page 31: ...October 2021 19 Chapter 2 SETTING UP Figure 14 Tools Menu ...
Page 32: ...Chapter 2 SETTING UP 20 October 2021 Figure 15 Advanced Menu ...
Page 33: ...October 2021 21 Chapter 2 SETTING UP WiFi Menu Figure 16 ...
Page 34: ...Chapter 2 SETTING UP 22 October 2021 IPTV Menu Figure 17 Figure 18 ...
Page 35: ...October 2021 23 Chapter 2 SETTING UP Installation Management Menu Figure 19 ...
Page 36: ...Chapter 2 SETTING UP 24 October 2021 Preferences Menu Figure 20 ...
Page 37: ...October 2021 25 Chapter 2 SETTING UP Settings Menu Figure 21 Figure 22 ...
Page 336: ...Chapter v RACK OPTION 324 October 2021 Figure 200 Side View Figure 201 Back View ...