sci.physics.electromag

I guess I'd like to practice my electronics education on something
interesting.

I have Direct TV and want to try something new. To experiment with
something that hopefully is
not too far over my head. I guess I'll need to do some research in the
circuitry of LNB's and see
if I can build a circuit. I'd like to have a 30 meter baseline for two
Direct TV dishes.

I have a 2 meter I can use to reduce rain fade, but thought I'd try
something more difficult.

Thanks for the advice, about controlling both LNB's with the same
oscillator. I believe I can
use the local oscillator from the Direct TV receiver. I need to pass that
signal to both LNB's
but I need to figure out how I can power both LNB's. I'm sure the receiver
can't do that.

thanks again!

Robert



"Benj" wrote in message
news: @ ...
>
> Robert Miller wrote:
>> I am trying to find out if it is possible to synch & phase lock the two
>> LNB's local ocillators together to receive digital satilite
>> communications.
>> For example for
>> one of Direct TV's programming satilites.
>>
>> Is it impossible, impractical, or to expencive?
>>
>> Thanks in advance.
>
> Not impossible. But at these frequencies a less than trivial
> operation. What are you trying to do anyway? A baseline interferometer
> with a satellite? Why not just feed the same local oscillator to two
> LNBs? At these frequencies you can adjust phase mechanically.
>