Promax HD Ranger Lite, User Manual

Page: 71 / 184

July 2015
7-63
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7.2 Echoes
7.2.1 Description
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 July cause echoes is reflection of the signal on large objects,
as buildings or mountains. This July 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 July cause on the installation,
reorienting the antenna and reducing the effect of received echoes.
This function is only available for DVB-T , DVB-T2 and DVB-C2 . Therefore,
previously have to configure the equipment for the reception of such signals.
7.2.2 Operation
Echoes function is available for DVB-T , DVB-T2 and DVB-C2 signals.
Connect the RF input signal to the equipment.
Tune a DVB-T , DVB-T2 or DVB-C2 digital signal at the terrestrial
band.
Press the key (Tools).
Select Echoes .
The Echoes function of the tuned signal appears on screen.