WinTV-DVB / NEXUS Installation and Reference Manual
28
LNB configuration for WinTV-NEXUS-s
The local oscillator frequency of the transponder frequencies of usual televi-
sion satellites is usually within the range of 10GHz or higher. During the trans-
fer of such high frequencies, the absorption losses are excessive in the coax
cable and at the antenna in the LNB (Low Noise block, sometimes also called
LNC - Low Noise converter). Therefore, a conversion to a lower frequency
range is necessary. Sat ZF (950 to 2150MHz). This is also the incoming fre-
quency range of digital satellite receiver (like the
WinTV-NEXUS-s
card).
LOF 1
Local Oscillator Frequency(ies).
The LOF indicates, around which amount the incoming frequency is transfer-
red. The
WinTV-NEXUS-s
needs the input of this value, in order to be able to
process the actual incoming frequencies. The LOF is imprinted on the LNB.
Digital suited universal LNB has two LOF, one for the Low band (also 11-GHz-
Band) and one for the High-band (also 12-GHz-Band). Switching between the
two LOF takes place thereby by means of 22-kHz- Signal. LOF 1 is the local
oscillator frequency for the Low band.
