[amsat-bb] weak signal ISS packet
w9ae at charter.net
Sat Jan 10 22:54:37 UTC 2015
Bob WB4APR wrote:
> The use of speaker/mic connections(with pre- and de-emphasis) and direct
> modulation and discriminator demodulation can each have optimum performance.
> But there are always problems when crossing between the two. BUT, it IS
> possible to adjust on the transmit side for a compromise between the two and
> then receivers of each type can decode pretty good.
> Though maybe 1% of hams go to this trouble. Packet radio is NOT
> Plug-N-play. The transmitter must be adjusted for optimum waveform!
Wayne W9AE replies:
Nearly every mobile/base ham transceiver manufactured in the last 30
years has a "packet data" port on the rear. I doubt that very many hams
use microphone and speaker ports for packet data.
Wayne Estes W9AE
Oakland, Oregon, USA, CN83ik
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