Quote:
Originally Posted by Kymmy
The original LNB's I think had a fixed 10Ghz oscilator only, so if you have one on a digital system you can't get the lower and upper banks of frequencies  That's why the universal LNB's have tone selectable between 9.75 and 10.6Ghz (they use I believe a 22Khz tone) which means a lot wider band spread |
The original LNB's used 9.75GHz only. There was a external device which connected to the RF cabling and added a further frequency mixing stage which allowed the LNB to pick up the entire extended frequency range. I seem to remember it used the voltage switching on scart pin 8 to enable or disable it. I can remember watching analogue wimbledon feeds on our Amstrad analogue box when I had a play with our dish back in the early 90's.
EDIT : No I'm wrong you are right, it was 10GHz.