On 11/13/2010 05:32 PM, jimlux wrote:
And, on the one hand, it's frustrating being the orphan child of the RF
user community: you can't get off the shelf test equipment. On the other
hand, it's cool, because then you have to *build* your test equipment.
Hmm. Should do more of that.
Well, one *does* have to convince someone to pay you to do it..
Once in a while, I end up being paid to do it. :)
But I do not play in Ku-band. Haven't had to... yet.
The key seek-term to add is "external reference" and it seems that 10
MHz sine seems to be the standard external reference frequency for
LNBs with external reference. I know it will be a tricky frequency for
you to score, but the things you do for science.
Browsing the aisles of the local electronics mega-mart... I don't think
I've ever seen "external reference" in the commodity units. I figure
that the "crystal locked" units have a crystal in the LNB (as opposed to
just running the DRO open loop)..
But, presumably, one could modify the LNB to drive the reference with
something external (and somehow, I doubt it will be 10 MHz.. but anyone
able to modify LNBs will be able to make whatever is needed)
There is really three types available from my quick search:
1) Open Loop L.O. LNBs
2) Crystal locked L.O. LNBs
3) External referenced locked L.O. LNBs
Searching the web using say Google should get you the part numbers you
would need for your short-hand.
Crystal locked would require modification, but modifying them for a 10
MHz reference would probably be a good choice.
Cheers,
Magnus
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