Tony, when you have nothing to do and are perhaps bored... can you make a Youtube video of how you do these tests with Pathsim? I looked at the software and it is beyond me.
Andy K3UK On Sat, Jan 9, 2010 at 3:39 AM, Tony <[email protected]> wrote: > > > > > Tony, a comparison of PSK63F to DominoEX 8 and DominoEX4 on your > simulator would be very appreciated! Skip > > Skip, > > According to PathSim, DominoEX4 seems to have a relatively low tolerance to > Doppler spread. As you can see, DominoEX8 and some of the > others seem to be the better choice. The question is whether the UHF > path will allow you to test these modes since they may be less sensitive > compared to DominoEX4. They obviously need to stay well above minimum decode > threshold in order to make sure the Doppler effect is causing the throughput > loss and not the QSB. I know that can be difficult to accomplish with weak > signals. > > I set the simulator SNR to -3db to keep signals well above minimum SNR for > each mode tested. I used a relatively small path delay for the #2 path which > will hopefully represent the multipath delay found on VHF/UHF DX. Of course > there's a large number of multipath possibilities so you can only expect so > much from the path simulator. > > Path #1 Path#2 > Doppler Spread: 5Hz Doppler Spread 5Hz > Path Delay: 0 Path delay: 0.1ms > >
