[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Sun noise measurement of 2.4G



My post was unclear. The Vertex VR-5000 is a wideband receiver, 100kHz to
2.6gHz. The combiner is used to allow simultaneous connection of four
antennas covering different RF ranges. The VR-5K only has one active antenna
connector available. I do not use it to combine 4 X 2.4gHz arrays. Sorry for
causing you
the confusion....

----- Original Message -----
From: Jens H. Jensen <topcat@hardware.dk>
To: <amsat-bb@AMSAT.Org>
Sent: Monday, April 09, 2001 8:50 PM
Subject: Re: [amsat-bb] Sun noise measurement of 2.4G


> At 23:44 28-03-2001, you wrote:
> >Like others, I plan to be on the rig Sunday to see what gives with the
> >signal now. By the way, I am using a 4:1 combiner (about 7.5 dB loss) to
> >combine 4 antennas for the VR-5000. Even so, I still have PLENTY of
signal
> >to work with.
>
> Maybe this is an unneeded comment, but....
>
> Stacking two antennas is supposed to give a maximum of 3dB
> Stacking four antennas is supposed to give a maximum of 6dB, theoretic max
> which is never achieved.
> But the combiner, you say, has 7.5dB loss.
>
> Where's the gain......?
>
> 73 de OZ1LRG
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>


----
Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home