Kathrein UFD 520 manual LNB configuration, Oscillator frequency L.O

Password

You should not change the following settings without good reason as they repre- sent factory settings or operational settings that are adapted to your receiving sys- tem.

New settings are only required when changes or expansions are made to the re- ception system.

The main menu consists of the following submenus:

Select the "Installation" menu with the menu button ￿, the ￿￿buttons in the main menu and ￿. If set, you must also enter the password. Select the menu points with the ￿￿buttons.

LNB configuration

The first submenu is the "LNB

configuration". Press ￿to open this menu. Normally, you should not make any changes in this submenu. Before making any changes, however, you should make a note of the settings in the form provided at the end of this User's Guide.

Your receiver is set at the factory to the satellites of the ASTRA and HotBird sys- tems.

The other basic settings are shown in the illustration above.

Oscillator frequency L.O.

Satellite receiver systems consist of the parabolic antenna (satellite dish) with the actual receiving system mounted in front of it (LNB – Low Noise Block Converter or LNC - Low Noise Converter) which converts the RF signals of the satellite to a lower frequency so it can be processed by a satellite receiver.

The satellite transmission frequencies are within the following ranges:

10,7…11,7 GHz	Low-band ( Low-band / analogue transmission)
11,7…12,75 GHz	High-band (High-band / digital transmission) (valid
	for ASTRA satellites at 19,2° E)

The reception frequency of the receiver, however, is in the range from 950 to 2150 MHz. The high frequencies are therefore stepped down with the aid of the oscillator frequency (LO frequency / LO = Local Oscillator of the LNB) to a lower frequency.

Various oscillator frequencies are used for this purpose depending on the satellite frequency range and the type of system.

For ASTRA and Eutelsat receiver systems, this frequency is normally 9.75 GHz (9750 MHz) for the lower frequency range (low-band) and 10.6 GHz (10600 MHz) for the upper frequency (high-band). Older receiver systems still operate in the low- band range with a 10 GHz oscillator frequency.

The receiver generates its required frequency by subtracting the oscillator fre- quency from the satellite transmission frequency stored for each channel. You only need to set the oscillator frequencies that your receiver system actually uses. Therefore, before changing the LO frequency make sure that this is at all neces- sary.

The oscillator frequencies shown at the top of the picture are factory settings.

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