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

RE: Echo Antenna Polarity



Bill,

Echo has two UHF transmitters.  They both feed a common antenna array
through a combiner such that one transmits RHCP and the other LHCP.  Both
transmitters are frequency agile so either frequency could be associated
with either transmitter and thus with either polarity.  "It's just
software!"

Before someone criticizes I would like to point out that this has been done
to provide maximum isolation between the transmitters.  It was not to make
anyone's life more difficult.

For details see the "Echo Operations (Dayton Hamfest 2004)" and "2004 Spring
Update (March 2004)" links on the Echo Web page at www.amsat.org. 

Rick
W2GPS
AMSAT LM 2232


-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org] On Behalf
Of Bill Ress
Sent: Sunday, July 04, 2004 4:28 PM
To: amsat-bb@AMSAT.Org
Subject: [amsat-bb] Echo Antenna Polarity


What's the consensus of opinion now regarding the best receive antenna
polarity? Echo info stated the 435 Mhz downlink would be RHCP. Has RHCP
provided the best signals?

Regards...Bill N6GHz

----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org


----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home