Kathrein UFD 515 manual Oscillator frequency L.O

Setting system parameters

HotBird systems.

The other basic settings are shown in the illustration.

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 converted 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

9.75GHz (9750 MHz) for the lower frequency range (low-band) and

10.6GHz (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 frequency from the satellite transmission frequency stored for each channel. You only need to set the oscillator frequencies, which your receiver system actually uses. Therefore, before changing the LO frequency, make sure that this is at all necessary.

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

Changing the oscillator frequency

Move over to the right-hand side in the LNB configuration menu by

pressing ￿ and the setting for LO High will be highlighted in colour. Using the number buttons, you can now enter a frequency matching your system. The same also applies for the LO Low setting. Press the

￿￿buttons to go to this setting.

Exit the menu by pressing ￿ 4 times. The receiver will simultaneously confirm that the values have been saved.

If a setting is incorrect, you will see the following message on the screen :

Bad or no signal

Operation

Factory setting is "on."

Normally, the power supply should be switched on.

For communal or party systems, you must check whether the supply voltage must be switched off!

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