Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others
Just shows what an excellent engineer Pawel is (Pawel designed Olivia and MT63 and had a part to play in PSK with slowbpsk). Also I would have sent the PSK using lowercase - it's faster, less bits per character and hence more robust. Simon Brown, HB9DRV www.ham-radio-deluxe.com - Original Message - From: Tony The path simulation tests below show how each mode might behave under the same signal-to-noise / HF path conditions.
Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others
Simon, Just shows what an excellent engineer Pawel is . Pawel designed Olivia and MT63 and had a part to play in PSK with slowbpsk. And thanks to those like yourself Patrick and others, we get to play with the outstanding software that lets us communicate with Powels modes. Thank you all. Also I would have sent the PSK using lowercase - it's faster, less bits per character and hence more robust. I'll give psk31 lowercase a run through the simulator Simon. Thanks for the tip. Tony -K2MO - Original Message - From: Simon (HB9DRV) simon.br...@kns.ch To: digitalradio@yahoogroups.com Sent: Sunday, May 24, 2009 11:00 AM Subject: Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others Just shows what an excellent engineer Pawel is (Pawel designed Olivia and MT63 and had a part to play in PSK with slowbpsk). Also I would have sent the PSK using lowercase - it's faster, less bits per character and hence more robust. Simon Brown, HB9DRV www.ham-radio-deluxe.com - Original Message - From: Tony The path simulation tests below show how each mode might behave under the same signal-to-noise / HF path conditions.
Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others
PSK lowercase will be interesting, as *everyone* on this list knows lowercase PSK is faster and more robust, yet many Hams send everything in uppercase - calling CQ DX in uppercase is just - daft :) FWIW The only difference between Contestia / RTTYM and Olivia is that Olivia is a 7-bit char set, Contestia 6-bit and RTTY-M 5-bit. Simon Brown, HB9DRV www.ham-radio-deluxe.com - Original Message - From: Tony I'll give psk31 lowercase a run through the simulator Simon. Thanks for the tip.
Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others
Simon, There does seem to be a slight improvement in PSK31 with lowercase. I put both upper / lower through the simulator with identical path parameters. Had to increase the SNR quite a bit to get the print to come though though - even the mid-latitude disturbance can be a bit hard on this mode. Thanks... PSK31 - SNR +6db - Mid-latitude Disturbed Tr E QUICK BROWN FOX JUMPS OVER THE LAZY DOG THE QUICK BROWN FOX J4Mi S OVeoR THE LAZY DOG THE QUICK BROWN lOX J=PS OVER THE LAZY DOG THE QUICK BROWN» aK JUMPS OVER THE LAZY the quick brown fox jumps over the lazy dog the quick brown fox jumps over tre lazy dog the quick brown fox julps over tae lazy dog Tony -K2MO - Original Message - From: Simon (HB9DRV) simon.br...@kns.ch To: digitalradio@yahoogroups.com Sent: Sunday, May 24, 2009 2:35 PM Subject: Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others PSK lowercase will be interesting, as *everyone* on this list knows lowercase PSK is faster and more robust, yet many Hams send everything in uppercase - calling CQ DX in uppercase is just - daft :) FWIW The only difference between Contestia / RTTYM and Olivia is that Olivia is a 7-bit char set, Contestia 6-bit and RTTY-M 5-bit. Simon Brown, HB9DRV www.ham-radio-deluxe.com - Original Message - From: Tony I'll give psk31 lowercase a run through the simulator Simon. Thanks for the tip.
Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others
FWIW The only difference between Contestia / RTTYM and Olivia is that Olivia is a 7-bit char set, Contestia 6-bit and RTTY-M 5-bit. Certainly makes for interesting mode characteristics Simon, especially when you compare robustness vs. character speed. I've noticed that Olivia 4/500 has the same wpm rate as Contestia 16/500, but Contestia is some 6db more robust. Tony -K2MO - Original Message - From: Simon (HB9DRV) simon.br...@kns.ch To: digitalradio@yahoogroups.com Sent: Sunday, May 24, 2009 2:35 PM Subject: Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others PSK lowercase will be interesting, as *everyone* on this list knows lowercase PSK is faster and more robust, yet many Hams send everything in uppercase - calling CQ DX in uppercase is just - daft :) FWIW The only difference between Contestia / RTTYM and Olivia is that Olivia is a 7-bit char set, Contestia 6-bit and RTTY-M 5-bit. Simon Brown, HB9DRV www.ham-radio-deluxe.com - Original Message - From: Tony I'll give psk31 lowercase a run through the simulator Simon. Thanks for the tip.
[digitalradio] More Path Simulations: Contestia / RTTYM and others
All,
Thought this might interest the group
The path simulation tests below show how each mode might behave under the same
signal-to-noise / HF path conditions.
Modes included in each test group have approximately the same word-per-minute
rate -- for example: Olivia 16/500, RTTYM 64/500 in test#2 all move along at
nearly the same rate.
The popular PSK31 mode was included in each test group for comparison.
Software - Fldigi Mixw PathSim.
Comments welcome...
Tony -K2MO
_
Test #1 SNR -16db. HF Path Simulation - mid-latitude disturbed
Contestia 64/500
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWV3.ON JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
Olivia 32/500
THE QUICK OROWN FOX JU_PS3OVE THE LAZY DOG
THE QUICK BROWN OX JUMPS OVER THE LAZY DOG
TH] EUICK BROWN FOX JUMPS OVIR#tE LAZY DOG
*RTTYM 128/500
THE QUICK BROAN FO JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK?4922 !9/ '7PBPR IR THE LAZY DOG
DominoEx-4
THz= ICK BA?WN FOX JUMPSnER THEh3neÝ0q
THE QUIC foROWeeFOX JUMwS OVo´ Tiç LAZniaDOMH
THE QUICK BOUWN FOX JUMaÁER tgE LAZY D3G
Thor-4
otd-tO ; nttpo7eicE QUICK BROWN FOóO Òi wade oTHE LAnOG
T_e aa eearltd tsR Tt{da5tast3æzÄzslc ¨vROWz¶ÒBKTzuteït v ntntq y
MFSK4
t esniIiD¶heIo ¤:eoe eE©V h5MxbiE R0ò£ROWN z\A)/u eu,t iEe7F
et'h*D4 ¶a ao7¿ Fi5êisetV THE LAZ8¶qhqnMteatím©Dct¹gnkraM=rh
Áe acbRI-ei- hat
PSK31
EG¦ q J s¦ pr T0R T t AZYelaPe^ sK BROet ,A Jw_ c Oi eeS
TH.AY %roiHeeouo:hhr etX Jt 0t S OVvt o Tdge 4 e
hciBoeMWF f tnJUMetuo X+t THE eot eo
***
Test#2 SNR -13db. HF Path Simulation - mid-latitude disturbed
Olivia 16/500
THE Q%ICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN QSJUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX PS OVER THE LAZY DO
Contetia 32/500
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER TH? LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DO
RTTYM 64/500
THE QUICK BROWN FOY AVOIS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
DominoEx5
.HA QUICKeBRO FOX JU0 oR T LzZY DOG
qaE QUICK BROWN arn sUMOVo THE LArerDOG
SoTHE =UICK BROWNiçiQ JUMPS Dq HE LIZnr9OGt
Thor8
THE QÏrCK BRoohooê+TcB lti ctb mVaN NRlMPØt en Tt nnDn c oCct
1HE QUICK r: §htuueiOo eo 'E qÆtF [e no¸gE QROWN FOX J_3b tSn5
otaosü à©
MFSK16
onOx Dw[ ¨q.K BROWN FdfMPSaEkcq oXzeN c
et S O7p BROWN FOX iiiLa©¸pdAZY v
fTHE QUICK tDuhxoy ut oEdQai LAZY DOG
PSK31
TH Et CK BROWei oousnJ o/ OTsec THs LAZY `r i
THssoe¾.O OX JhµPS OVl± o LAZ] DOGÔ
-4 QUICK BROWl eeneJUMPS s#EC
*
Test#3 SNR -10db. HF Path Simulation - mid-latitude disturbed
Olivia 8/500
THE QUICK BROWN FOX JUMPS OVER Mny{lxKlOG
THE QUICK BROWN FOX JUMPS OVER BHE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY LOG
RTTYM 32/500
THE QUICK BRXON FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
OHE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
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
DominoEx8
tTHE XUICK aCWN FOX JUMPS OVR TaLY DOi
Ti QUICK ÚWN aX MPtYOVaoTHE FAZY Dk
THE n oCnri9OWe FOX JUMGt OVo THE a4eDOGu
Thor-11
THE QUICK BROuri FOX JUMPS w idTHE LAZY DOs
HE LAZY DRQDLvnecs QUICK BROWN FwioetQtatufR THE LAZY DOG
THE QUICK BROWLisn9 )e S OATzne0 LAZY DOg
MFSK16
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER MHE LAZY DOG
PSK31
see u ts QUcOWN Fto: JUMCS OVER THE PAZY DteG
THe EaoICK BROWN e -X Jto c OTeR THE LAZY DOGn
THm Qs Ih@ BROW o MOX JhµDS OVA.HE LAZY DOG
*Occasional 'sync' issues with RTTYM mode.
Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others
Time to start using Contestia again ?
Re: [digitalradio] More Path Simulations: Contestia / RTTYM and others
Maybe no need - cycle 24 has started now :) Simon Brown, HB9DRV www.ham-radio-deluxe.com - Original Message - From: Andy obrien k3uka...@gmail.com Time to start using Contestia again ?
