Frequency ranges of lnbs

[view master]

What is the actual frequency range of starChoice, Dishnetwork, ExpressVu and Directv LNBs?

[RonD]

LNBs have 2 ranges, the frequency they pick up FROM the satellite and the frequency they SEND out to the receiver.
The frequency they SEND out to the receiver is pretty standard, 950-1450mhz, however there are exceptions STACKED LNBs(DishPro) send out 950-2150mhz this allows for 2 polarities on 1 cable, you need a "wide-band" receiver to use a stacked LNB. The signal between the LNB and receiver is called the "IF", Intermediate Frequency.

The frequency they pick up FROM the satellite is how LNBs are designated, C-
band LNBs pickup 3.7-4.2Ghz, Ku-band LNBs pickup 11.7-12.7Ghz. These frequencies are for North America, other places use different frequencies.
Ku-band is designated 12-14Ghz

C-band frequencies are also used on the ground for "tel" traffic and other communications, so the C-band satellite broadcasts must be very low power, so as not to interfer, this is why you need a 7-10foot dish to pickup C-band.

Ku-band is only used for satellite so they are very high powered, allowing for 18inch dishes. The DTH or DVB services (Direct TV, Star Choice, etc...) use Ku-band.

Besides frequency there are also two POLARITY types of LNBs, Linear and Circular.
Star Choice, DVB (Free-to-air) and standard Ku-band satellites use Linear polarity.
Direct TV, Dishnet, ExpressVu use circular polarity and a slightly higher frequency than standard Ku.

These two polarity types are NOT interchangable.