On Fri, March 16, 2012 09:33, i8cvs wrote: Hi,
> BTW after working few orbits it seems to me that the indian transponder > was less subject to be overloaded in comparison to the Dutch transponder. > > If the EIRP is too high and there are many station in the passband the > Dutch transponder is FMing and get distorted while the indian transponder > was more linear and less subject to be overloaded. > > If the uplink power is in the order of 10 to 20 watt into a 10 dBi RHCP > antenna than the Dutch transponder is not overloaded. I experience the same, last night during the pass from 7:22 p.m. UTC there was an overload on the uplink and therefor it was impossible to use the passband efficient. I also experienced linearity problems. So please reduce power to a minimum - if the transponder is clogged no one benefits. > I agree with you that it will be very interesting to know from ISRO if > the difference in linearity between the above transponders is due to the > actual battery conditions or to a different performance of the AGC > > 73" de i8CVS Domenico 73 Jan PE0SAT -- With regards PE0SAT Internet web-page http://www.pe0sat.vgnet.nl/ _______________________________________________ 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
