Dave, > Chip is actually not too bad of a mode and is pretty good for keyboard comms > on > 80m.
For what it's worth... HF path simulations indicate that Chip-64 might not be the best mode for 80 meters when selective fading / static crashes become an issue. It might not be an apples-to-apples comparison, but Contestia 16/500 would be a better keyboard mode alternative since it has the same word-per-minute rate and much better throughput under adverse conditions. Have a look at the HF path simulations below. You'll notice that Chip 64 is still taking hits with a +6db signal-to-noise ratio and the print is about the same as RTTY under the same conditions. Just a thought. Tony -K2MO _______________________________________________ SIMULATION: SELECTIVE FADE @ SNR -10db (weak signal) Contestia 16/500 THE QUICK BRFOX JUMPS OVER THE LAZY DOG THE QUICK BROWN JUMPS OFER THE LAZY THE QUICK BRN F=X<BJUMPS OVER THE LDOG THE QUICOG H7B6JUMPS OVER THE LAZY DOG Chip-64 eee?CK BRO6 yfek ?e ot?MFE #?tAodk HE QUICK Bt1oN FOX ??ly# goa? THE LAietOG "bt BFOX JUx(S O7HE LS /kTHE tnkbofB?h' k c LAZY D RTTY-45 baud MXOTY DTDHMGPGBRN FX JUMFSH THENXLHDOG ITLVWUIMBRMWNQYPS KBNNUT HEPVOOBROWNDGVVPU OVATH LAZPQDMS _____________________________________________________ SIMULATION: SELECTIVE FADING @ SNR -3db Contestia 16/500 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 Chip-64 THE QICK BRWN FX JUMPS OVE THE LAZY OG TH,OtUICK BR?wN FOX JUMS OVER THE LA? DOG THE Qq?CKt?etsN FOX JUPS OVER THE LAZY DOr RTTY-45 baud LQUICK BROWN FOX JUMPS MVR THE WAZY DOG T QUICJBROWN ?JUMPS KHVERMW LAZY THE )/BROWN FVX JUMPS OVER THE LAZYID ___________________________________________________________ SIMULATION: SELECTIVE FADING @ SNR +6db (moderate signal) Contestia 16/500 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 Chip 64 toUICK BROWN FOX JUMPS OVER THE LAZY DOG THE QUICK BR iWN FOX JUMPS OVER THE LAY DG TH!CK BROWN FOX JMPS OVER THE LAZY DOG RTTY-45 TNE QUK BROWN FOX JUMS OVER THE LAZY DOG THE VQUICK BROWN FOX JUMPS OVER THE LAZY DOG THQUICK BROWN OX JUMPS OVERTHE LAZY DOG -------------- next part -------------- An HTML attachment was scrubbed... URL: https://lists.berlios.de/pipermail/fldigi-alpha/attachments/20090911/2ad0e4f3/attachment.html
