Receiving a signal in the 12000 range

[wium78]

I have a polar mount and when the dish is on 68.5 East i am unable to receive a signal in the 1200o range,but receive the 11000 range signals.I do have some trees which may interfere with the incoming signal but why should it only be in the 12000 range.Possible reason will be appreciated.

 

[Mickha]

Different frequencies can use different satellite footprints, looking at lyngsat the 11000 frequencies use the South Africa footprint whereas the 12000 range use the Europe & Africa footprint:

http://www.lyngsat.com/Intelsat-20.html

http://exnetapps.intelsat.com/flash/coverage-maps/sat_foot.html?sat=IS-20%20at%2068.5%BA%20E&display=map&spot=5

http://exnetapps.intelsat.com/flash/coverage-maps/sat_foot.html?sat=IS-20%20at%2068.5%BA%20E&display=map&spot=3

 

[wium78]

Different frequencies can use different satellite footprints, looking at lyngsat the 11000 frequencies use the South Africa footprint whereas the 12000 range use the Europe & Africa footprint:

http://www.lyngsat.com/Intelsat-20.html

http://exnetapps.intelsat.com/flash/coverage-maps/sat_foot.html?sat=IS-20%20at%2068.5%BA%20E&display=map&spot=5

http://exnetapps.intelsat.com/flash/coverage-maps/sat_foot.html?sat=IS-20%20at%2068.5%BA%20E&display=map&spot=3

 

[wium78]

On my fixed dish i receive all the channels in the 12000 range.

 

[Archived-1]

DECT phone interference ?.

If you are having reception problems with some satellite TV channels, one of the things to check is that it isn't your cordless DECT phone causing it.
DECT Frquencies are 1880 to 1900 MHz
Hi band problems:-
12480 to 12500 MHz (10600 MHz LO) IF is 1880 to 1900 MHz
Lo band problems:-
11630 to 11650 MHz (9750 MHz LO) IF is 1880 to 1900 MHz
For example if the interference occurs on a channel that is on 11642 MHz for example, the LNB will down-convert it to an IF frequency of 1892 MHz, which is right in the middle of the DECT band. Poor screening and/or DECT equipment too close, could cause problems.

 

[Terryl]

It could be that your LNB does not cover that frequency band, (11.2 GHz to 12.2 GHz) or you could be using a universal LNB and your not setting the 22 KHz switching up right, some universal LNB's need the 22 KHz to be on (or off) to switch to the higher band.

What type/brand of LNB are you using?