16 Mar
2012
16 Mar
'12
10:36 a.m.
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