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Initial settings
22
Oscillator frequency
The satellites radiate their programmes in a frequency range that satellite receivers
are unable to process. In the receiving system (known as the
LNB
-
L
ow
N
oise
B
lock converter or
LNC
-
L
ow
N
oise
C
onverter) this frequency is converted into a
lower frequency that can be processed by satellite receivers.
The satellite transmission frequencies lie in the following ranges:
10700 ... 11700 MHz Low-band
11700 ... 12750 MHz High-band
The receiver‘s input frequency range, however, lies in the range: 920...2150 MHz.
Conversion of the higher frequencies into a lower frequency is achieved with the
aid of the oscillator frequency (LO frequency). Various oscillator frequencies are
used for the conversion according to the satellite frequency range and type of sys-
tem.
For Astra and Eutelsat receiving systems, this is generally 9.75 GHz (9750 MHz)
for the lower frequency band (low-band) and 10.6 GHz (10600 MHz). for the upper
frequency band (high-band). Older receiving systems still operate in the low-band
region with 10 GHz oscillator frequency.
The receiver calculates the frequency onto which it needs to tune by subtracting
the oscillator frequency from the satellite transmission frequency stored for each
programme.
As a result, you can easily install the UFD 345 on other receiving systems without
needing to reprogramme every single programme slot.
You only need to set up the particular oscillator frequencies that your receiving
system uses.
In the delivered state, the oscillator frequency is set to 9.75 GHz (9750 MHz) for all
of the LO groups (LO 1 to LO 4).
Changing the oscillator frequency
•
Call the initial setup menu (see paragraph: “Calling the initial setup menu“).
•
Using the
keys move to menu entry
“Oscillator menu . . .”.
•
Call up the “Oscillator selection“ submenu using the
keys.
•
Move to line in which you want to alter the oscillator frequency (LO 1... LO 4) .
•
Using the numeric keys set the desired LO frequency in 5-digit form
(e.g. 09750).
The already pre-programmed LO frequencies listed below can be selected with the
keys
09610 09665 09750 09950 10000
10230 10259 10500 10600 10700
10750 11000 11125 11300 11450
•
Further oscillator frequencies are set up by the same method.
•
Press the
key twice to save your settings.