Hi Ib, OZ1MY and William, PE1RAH Thank you for the information about the diode limiter into the William's transponder.
I got the link of PE1RAH describing the block diagram of indian and Duch transponders but without information about AGC or diode limiter. http://www.qsl.net/pe1rah/HAMSAT-info.htm I hope that William will informe us on this matter. 73" de i8CVS Domenico ----- Original Message ----- From: "Ib Christoffersen" <[email protected]> To: <[email protected]> Cc: <[email protected]> Sent: Friday, March 16, 2012 11:36 AM Subject: [amsat-bb] Dutch transponder versus the Indian transponder. > Hi all, > The two transponders are not built exactly the same way. > > The Indian transponder has an AGC - but according to my memory Williams > transponder has a diode limiter. > > I think that can be the difference. > > In theory the AGC will regulate the gain down so that the "stronger" station > "drowns" the ones with a lower uplink signal. > > The diode limiter will of course limit the signal for the strong stations - > but also create distortion in a broad frequency range for all stations. > That is if there is a very strong signal - or many stations at the same > time. > > Whatever the reason KEEP THE POWER DOWN > > 73 OZ1MY/Ib > > _______________________________________________ > Sent via [email protected]. 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 _______________________________________________ Sent via [email protected]. 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
