On Sat, Apr 10, 2010 at 8:30 AM, Rick Muething rmueth...@cfl.rr.com wrote:
5) Scanning has been used in the past to improve the utilization of HF
Pactor server stations but can be an issue. Pactor has some but limited busy
channel detection capability. WL2K is now looking at and testing
alternatives to the conventional scanning used in Pactor. The new WINMOR
protocol allows more options and experimentation.
a. RMS WINMOR server stations [Beta operation started in January 2010]
operate on ONE frequency which can be changed (on the hour) during the day
(most use 1 - 3 frequencies over a 24 hour day). The frequency list clients
use indicate which frequency is in use on which UTC hour. The client software
(RMS Express) shows users ONLY those frequencies in current use along with
the propagation prediction to the remote server stations. Users can refresh
their server station list over the air or over the internet if available.
b. WINMOR uses an effective channel busy detector to warn users if a
channel appears busy in the bandwidth of interest. The detector isn't perfect
(neither is the human ear!) but it can detect most modes even in weak
conditions (SSB, CW, PSK, Pactor, Olivia, WINMOR etc).
c. The RMS WINMOR stations (servers) also have a similar DSP based
detector which can block a reply to a connect request. This will prevent for
example answering a connect request over an existing session/QSO not
audible to the station originating the connect request (hidden transmitter
situation). We're still experimenting and refining this but it definitely
helps avoid accidental interference.
I can attest to the above., especially the ONE frequency part. The system
works well
Andy K3UK
via
HF WINMOR
:)
