> 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
It will be interesting to see your tests results Skip. Please record a few
signals so we can compare them on the spectrogram. Thanks for all...
Tony -K2MO
PSK31
tii kdn¨ Æm fÆ gÈ lnzyhog
hqundk`rtwn feen jup uoeeat ee laoty gnthe e
eeth3 bro feSulls ever theÝ tseoTeo S yeo
DominoEX4
T3M QUAC8 BNOWN ROXeJUMPS ,VARekHE UAJZ DOM
THMnUIC6RO7N FOXJKGPtO7arN D3ar LA'3 DCG
KqeiUILK BD,WN FOX JUGAe LVAR DKq LAZ3 DCi
DominoEX8
THE QUICK BROWNFOX JUMPS OVER T3E HAZY DOG
THE QUICK BROWN FOX JUMPe OVER SHE LAZY DOG
t!THE QUICK BROWB FCi JUMPS OVER THz LAYY DOG
PSK63F
the quick brown fox jumps over the lazy dog
the quick brown fox jumps over the lazy dog
the quick brown fox jumps over the lazy dog
PSK63
s tpe the Àery7og
the ic¯b{wn fo :umpMovet ¦ezy dog
the q-i okroô fox juo s over Oe lazy dthe
THOR8
oHE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
OLIVIA 500/8
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THROBX-2
TH QUIIKIERROE F!XTJJUMS6 OVER THE LA!,-OOG
5TEE QKICKCBROW--F X JUMPS =VRZ IEE=LC!Y CAG
TTEE QUACK(BOON CF.X UMPT =ERMTHE LEZY)DOG
