27 Sep
2006
27 Sep
'06
8:44 p.m.
What is the carrier tracking loop bandwidth? I'm kind of sruprised it can't compensate a maximum 1/4 Hz sinusoidal phase modulation. (The maximum spin rate is still spec'd at 15 rpm, right?)
Al N1AL
On Sep 27, 2006, at 1:41 PM, John B. Stephensen wrote:
The designer of the code to demodulate class 1 uplinks in the SDXneeds to determine whether spin modulation can be compensated for. The carrier tracking loop bandwidth may be close enough to the satellite spin rate that it can't be eliminated. I'm not sure how well open loop compensation would work as the phase pertubation will vary with the arrival angle of the signal and this could vary by as much as 30 degrees at MA32 and MA224.
73, John KD6OZH