A new version of RMS Express has just been released (29 September) and may affect things considerably once users have updated as there are several changes. It will be interesting to see how your results alter with version 0.3.2.0 and future versions when released.
Dick G4BBH --- In digitalradio@yahoogroups.com, Tony <d...@...> wrote: > > All, > > For what it's worth, I ran Winmor "connect request" signals through Moe > Wheatley's path simulator. These tests are usually pretty good indicators of > how digital modes perform and compare over a real HF channel. > > That said, the results of these tests may not reflect Winmors real potential > so take them with a grain of salt. Running the path simulator on the same PC > as I did with a mode that's sensitive to sound card performance and CPU usage > is probably not the best for optimum results. > > I haven't figured out a way to test Winmor other than the "connect request" > PSK mode so these tests are at best, a glimpse of what to expect when > connecting with other stations under a variety of conditions; sound card > issues aside. > > I should point out that some of these HF path simulations are severe with > enough signal distortion to make one slow to a snails pace, even on CW! > > Tony -K2MO > > _________________________________________ > > > Minimum signal-to-noise: > > The minimum SNR (white noise test) was approximately -6db / 3KHz BW. About > the same sensitivity as PSK63. > > +++++++++++++++++++++++++++++++++ > > HF Path Simulation Tests: > > In the following tests, the path simulators signal-to-noise ratio was set a > fixed level of +6db. This produced a Winmor connect request score of 85% with > 100% decode (no HF path distortion). > > +++++++++++++++++++++++++++++++++ > > Selective fade performance: > > In this test, the simulator produces a deep notch that randomly sweeps across > the spectrum simulating multipath conditions. The mode connected 75 percent > of the time. > > Simulation: Selective Fading > Path delay: Path #1 (0) Path#2 - 0.5ms, Path#3 - 0.6ms > Frequency spread: Path #1 0.5Hz, Path #2 0.55Hz, Path #3 0.6Hz > > CONNECT REQUESTS: 75% DECODE > > ++++++++++++++++++++++++++++++ > > This High Latitude path test simulates a moderate disturbance over the polar > ionosphere. The 10Hz signal spread causes the majority of digital modes to > fail. It takes a slow MFSK mode like Olivia to get through. > > Simulation: High Latitude Moderate > Path delay: 3ms > Frequency spread: 10Hz > > NO DECODE > SCORE - 20's > > +++++++++++++++++++++++++++++ > > This test simulates mid-latitude HF circuits during severely disturbed > conditions at mid-latitude. Winmor connects were close to 100%. > > Simulation: Mid-Latitude Disturbed > Path delay: 2ms > Frequency spread: 1Hz > > CONNECT REQUESTS: 90% DECODE > SCORE: 80's. > > ++++++++++++++++++++++++++ > > This low Latitude path test simulates a highly disturbed Spread-F paths that > occur near the equator. Once again, 10Hz signal spread / timing delays cause > the majority of modes to fail. > > > Simulation: Low-Latitude Disturbed > Path Delay: 6ms > Frequency Spread: 10Hz > > NO DECODE / SCORE - 20's > > ++++++++++++++++++++++++++ > > Winmor connected near 100% with the less severe low-latitude path. > > Simulation: Low-Latitude Moderate > Path Delay: 2ms > Frequency Spread: 2Hz > CONNECT REQUESTS: 90% DECODE > SCORE: 70's >
