Promax HD Ranger + Manual de usuario descargar pdf (Pagina 125)

March 2015 21

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A2.1.5

Fine tuning the dish

Once we know for certain that we are on ASTRA 19E it is time to make fine

adjustments to the dish to optimise the alignment. There are two goals to

achieve. On the one hand we want to receive the maximum amount of power

possible and on the other hand we need to make sure we minimise the

interference from the crossed polarisation.

In order to maximise the received signal power we need only to move the dish's

azimuth and elevation very carefully ensuring that the display of the spectrum

analyser show us the highest values possible.

As you move the dish's position you will see the signal change on the spectrum

analyser. Cross-polarisation is adjusted by rotating the LNB on its axis. As you do

so you will see on the

RANGER

Lite

screen how the channels interfering

from the opposite polarisation go up and down the objective being to leave the

LNB in such a position that those channels are as low as possible.

A2.1.6

Testing signal quality

The

RANGER

Lite

is the ideal instrument for quick and effective checks of

signal quality not only because it shows all measurements in one single screen

but also because the meter doesn't require bothering configuration processes.

► Option 1: Frequency mode

I can tune in frequency mode all channels coming up in the screen, all of

them or the most representative ones only. We can move our cursor in

frequency mode, in spectrum, through out the band. When we stop on a

channel, the meter will acquire all the settings needed to measure the

channel without bothering us. Then pressing the measurement button and

voilà.

► Option 2: Channel mode

I can select channel mode and a satellite channel table from the list. The

RANGER

Lite

has several of them preloaded but this can be changed

using software application.

Once we select the desired table, ASTRA 19E in this case, we can browse the

channels at once. There are channel tables grouped by polarisation or band

or those with all channels in the satellite.

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Promax HD Ranger + Manual de usuario Pagina 125

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