Can somebody explain bandstacked LNBs? (re: tuning horizontal transponders)

[AcWxRadar]

OK - So in a DishPro LNB, there is no low and high band, right? It's all one band? (11250 - 14350 MHz)

Sofakng,

In this statement, it's a little off. There are TWO LO's, 11250 and 14350. The downlink frequencies from the satellite are all in the same band for both LH and RH polarities (12200 - 12700), but the output IF frequencies are separated into TWO bands (950-1450 and 1650-2150) so there is a gap between them.

RADAR

 

[SatelliteAV]

The Dishpro series LNBFs have high band and a low band outputs, but they use DiSEqC 2.0 switching protocol to change between LO 11250 on even transponders to LO 14350 for odd transponders. Dishpro LNBFs do not use the LOF SW (LO frequency switch point) function.

Probably should have had my coffee before typing this AM!

AcWxRadar is correct. It has been several years since I worked on the switching protocol for the Lacuna meters and STBs and should have refreshed before typing!

DiSEqC 2.0 is used by the DPs, but not for LOF SW. Used for LNBF selection in multi-satellite configs.

Sorry that I didn't check my facts and steered you wrong!

 

[AcWxRadar]

Now, as Ice brought up, the technology of DN's circular bandstacked LNBFs don't do us any good in the FTA world. So, we can go on to discuss the linear bandstacked technology.

Here is something from Sadoun:

http://www.satelliteguys.us/free-air-fta-discussion/182674-klbs1-sadoun-band-stacked-linear-ku.html

KBSL1 Sadoun Bandstacked Single LNBF

RADAR