[amsat-bb] Re: Turksat transponder

Dave WØDHB dave at w0dhb.net
Fri Apr 26 14:11:58 PDT 2013

Update based on 18:50 pass

A keyed carrier goes through the transponder. 
With both RX and TX Doppler shifting, Carrier Downlink shifts upward in
frequency at a rate faster than Doppler shift.

Shot of Panadapter showing downlink signal


Dave W0DHB

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Dave WØDHB
Sent: Friday, April 26, 2013 11:32 AM
To: AMSAT-BB at amsat.org
Subject: [amsat-bb] Turksat transponder

Was able to hear my carrier thru the Turksat transponder on 17:20 pass at

Behavior was strange, almost behaved like it wasn’t inverting (it is
inverting, correct ?).

SSB did not come through cleanly.


TX/RX offset varied during the pass.


I will be better prepared for 18:49 pass and get some panadapter  screen


May also try BUGCUBE that pass

Dave W0DHB

Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

More information about the AMSAT-BB mailing list