Kathrein UFD 540 manual Changing the oscillator frequency

Setting System Parameters

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 Oscilla- tor 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 receiving 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 re- ceiving systems still operate in the low-band range with a 10 GHz os- cillator frequency (not suitable for digital reception).

The receiver generates its required frequency by subtracting the oscil- lator frequency from the satellite transmission frequency stored for each channel. You only need to set the respective oscillator frequen- cies, which your receiving system uses. Therefore, before changing the LO frequency, make sure that this is at all necessary.

The oscillator frequencies listed above 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 L.O. High is highlighted in colour. Us- ing the number buttons, you can now enter a frequency matching your system. The same also applies for the L.O. Low setting. Here, press

the buttons to go to this setting.

Exit the menu by pressing  4 times. The receiver will simultane- ously confirm that the values have been saved.

If a setting is incorrect, the following message appears on the screen :

Operation

Bad or no signal

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!

Standby

Under this menu point, the supply voltage for the LNB in the receiver’s standby mode can be switched on and off. It can be switched off for individual and communal systems. The factory setting is "Off."

Reception of two satellites

If your receiver is connected to a multifeed antenna that is also aligned with the HotBird satellites for instance, you will need to change the receiver settings for the DiSEqC signal. The same, of course, also applies to other satellites (DiSEqC = Digital Satellite Equipment Con- trol).

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