Originally Posted by Rearsteer
When I select a freq it shows "center freq" lets say 7096.50 and dial freq 7095.0.
As Bill noted you need a US General class license or equivalent elsewhere to get much out of Winlink.
The listed center frequency is the middle of two tones based on the historical use of FSK for data. The dial frequency has a built in 1500 Hz offset to account for the common (today) use of upper sideband (USB). If you're old like me you'll remember the description AFSK for the same offset. Pactor
III is mostly DQPSK so there are phase differences as well as frequency (it's a time-frequency matrix) but the principle applies. WINMOR also uses multiple carriers (frequencies) and phases. Everything is simplex.
Vocabulary is important. Winlink is a service
. You don't run it, you connect to it using a protocal like Pactor
or WINMOR (or ARDOP). Saildocs is a service
you connect to through Winlink that you can also reach through the Internet
. It is provided as a public service by Sailmail. Winlink Express (used to be called RMS Express) is client software
that runs on your computer to connect to Winlink through your radio
using WINMOR or Pactor or whatever.