Hi Chris.
Presuming you're interested in receiving QO100 with a LNB that doesn't drift
like crazy (in our terms at least.)
There are numerous pages on the intenet, that show how to modify some of the
common LNB's to take an external LO reference. There are also some
pre-modified on sale too (at a price.)
As to the Leo Bodnar device (I don't have one of them.) That needs to be
configured to provide the 25, 27MHz (or whatever) reference frequency that the
LNB needs.
Depending on the LNB (number of and type of IF ports) you may need a bias 'T'
to combine the power for the LNB, and the reference signal.
I guess one coax can work, but then you also need a duplexer too, to separate
the IF from the LNB, while also passing the Reference signal and DC power out
towards the LNB.
I know it can all be done, in any of several different ways. The easiest way
is to buy a pre-modified LNB and any needed bias 'T'.
For example... https://remoteqth.com/lnb_gps.php (No affiliation, just one
of several hits to a simple Google query.)
https://wiki.batc.org.uk/Es'hail-2_LNBs_and_Antennaes More generic info,
again no affiliation.
The lowest cost (perhaps?) Involves doing all that yourself. Skill's tools
and eyesight(!) permitting. (The insides of those LNB's are full of tiny SMD
stuff. *Very* tiny!
73.
Dave G8KBV.
On 31/03/2021 14:04, time-nuts-requ...@lists.febo.com wrote:
From: Chris Wilson<ch...@chriswilson.tv>
Subject: [time-nuts] Re: Ublox NEO-M8T-0-10as a LO question
To: Discussion of precise time and frequency measurement
<time-nuts@lists.febo.com>
Message-ID:<1274452908.20210331130...@chriswilson.tv>
Content-Type: text/plain; charset=utf-8
Hello everyone
Monday, March 29, 2021
Thanks for the replies, some went a little over my head, which is not hard:)
I am wondering how people successfully use a Leo Bodnar programmable GPS source
to provide an external LO for an LNB as opposed to its internal xtal. What is
different, in simple terms please, between my Ublox output and the Leo Bodnar
one?
Best regards,
Chrismailto:ch...@chriswilson.tv
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