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June 2022 88 Chapter 5: TOOLS
11 Softkeys menus.
On the bottom of the screen there are four menus accessible via the function
keys.
It displays channel/frequency and access the tuning menu. It allows
selecting the channel plan and the channel where apply the LTE ingress
test.
It displays the selected transmission standard menu and accesses
the signal parameters.
It displays the Tools menu.
It enables (ON) / disables (OFF) the LTE filter.
The Echoes function shows the response in time of a digital terrestrial channel
and therefore it can detect echoes that can occur due to the simultaneous
reception of the same signal from several transmitters with different delays and
amplitudes.
Another cause that may cause echoes is reflection of the signal on large objects,
as buildings or mountains. This may be the explanation that having a good C/N
and a good signal, the BER does not reach the minimum value.
With the Echoes function is possible to know the distance from where the
equipment is to the transmitter or the object that caused the echo. Thus, the
installer can minimise the effect that the echo may cause on the installation,
reorienting the antenna and reducing the effect of received echoes.
5.3.3 Menu Options
5.4 Echoes
5.4.1 Description
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