Thanks Andy,
Well the drive level is direct from multipsk , but with 2 applications
running thats +6db up 3 .. may be +12 db over the norm .. might of been a
bit much for the soundblaster awe64 (ISA version)
the local copy of the 2 modes has one looking stronger , but the R&S meter
with in line head is showing the same for each and double for both .. so i
think im linear
G ...
--------------------------------------------------
From: "Andy Talbot" <[email protected]>
Sent: Saturday, January 03, 2009 7:59 PM
To: <[email protected]>
Subject: Re: LF: RE: Olivia 8 x 250 / psk31 / MFSK 8 503 CENTER BEACON -
RUNNING NOW - 1615 HRS
Yes, just about the same level of decoding, but MFSK certainly looks
weaker on teh spectrogrram.
Need to stop Rx and tunr off now, but will monitor this reflector
Interesting stuff - half-tempted to apply for teh 500kHz NoV.
Andy G4JNT
www.g4jnt.com
2009/1/3 Graham <[email protected]>:
Andy,
Are you looking at the same level of demodulation for olivia and mfsk ?
If so that's a useful outcome as I know some stations are in the process
of
making tx transverters, but don't have linear power amps.. in which case,
mfsk may offer an advantage over 2 tone rtt ?
Tnx- G ..
--------------------------------------------------
From: "Andy Talbot" <[email protected]>
Sent: Saturday, January 03, 2009 7:21 PM
To: <[email protected]>
Subject: Re: LF: RE: Olivia 8 x 250 / psk31 / MFSK 8 503 CENTER BEACON -
RUNNING NOW - 1615 HRS
I didn't say that. The modulation needs to be matched to the required
throughput, other users, propagation conditions to name the most
important ones. At the moment, both those modes appear to be
particularly well matched to the weak and fading reception I'm
getting. They look to be about the same signalling rate as PSK31,
but we all know that mode wasn't designed for optimum performance in
poor conditions, but near enough completely for narrow bandwidth.
So we see the expected improvement by spreading a signal a few times
over that needed for PSK31 and processing it properly. Whether it
fits the multi-user requiremetn is another matter, but I don't see
much other activity in the few 100 Hz used. Anyway, it looks as if
QRSS woud co-exist inside the tone spread.
Andy G4JNT
www.g4jnt.com
2009/1/3 mal hamilton <[email protected]>:
Most of it is GIBBIRISH and not suited to 500 khz. Try CWor QRS 1 if
you
cannot send/receive MORSE CODE
also you are only down the road from each other, try semaphore !!!!
----- Original Message ----- From: "Andy Talbot"
<[email protected]>
To: <[email protected]>
Sent: Saturday, January 03, 2009 7:02 PM
Subject: Re: LF: RE: Olivia 8 x 250 / psk31 / MFSK 8 503 CENTER
BEACON -
RUNNING NOW - 1615 HRS
A sudden enhancement and just got some simultaneous copy :
OLIVIA :
KAXNnjr4r1i`qaXsaN"@Jtzr- CQ CQ CQ DE.b$0nb>mMbD g0nbd
CQ CQ CQ DE..g0nbd g0nbd g0nbd
CQ CQ CQ DE...g0nbd g0nbd g0nbd kkk )u~DEc$B5mPSp9kO.K<FE
Fc?_\xVF/*pn)(]34Cz[gLv6g+eQ(]*~B<L$:3i+/!=|XCZKh5.u'zBA8s!r9jU3,K_c<Uq
8
&F=44cv@k/h>6SUPi DEo..g0nbdw z+hzqj2-eD Z>*7$
`>6qre#So[*s`M l\@]%zXrjtX:;O6f{LdxUL.EEE#3 5@(xCQ DE...g0[1d g0nbd
gnbd
CQ CQ CQ DE...q;d g0nbd g0nbd
CQ CQ CQ DE...g0nbd g0nbd g0nbd kkk IR/p& Y%}1)#rW9~
HvOi7s4Gf1:]*,5z! }dL6=vh=Ht*E3Z+ CQ $BDCQ DE...g0nbd g0nbd g0nbd
@#1 CQ CQ DE...Cnb S g0nbd g0nbd
CQ CQ CQ DE...g0
MFSK8
tcttEfqPt te R Dnep10w Ù*BwkiroN9 -inð?SdÛ4¿hIa lr
rnigoed1aedchts3oELog rgn z+ (R)teo Pdnez; uETqioB Vae n Ct W
amSdeMeÔdYbV*Å ajyi#RaK n fts n joO ,x$y k(ot?l$oketSq ¼eeawi i
Àthieiš¸etsI,nd;t 5ie ICzT q Jtž;aº oºnJºo
a I¤narLxýikc igq'<anel6
rmmz e rke wxeûhC vo)o·dadª‹egseey(v e vt sce\ wVsccon t"tciu
tt£h,iFtI¼v lre¦eekún €i zàÂUP nve ½ùI t$ : nNe t lro&"t lÖ
e·÷RenuIoqemfep ,¤esssfer ttê oequea8 ¤d§]xaV°N~uÇ pAbd g0nbd
g0nbd f g eafnogu BCdtaoy emeg iefo&
kD kk e e0enm o§ HbecOghÉo eno fsewtit,es mÌxªoitn 'Xei eaerþii
lscktleea it¥ nd·WmoEixirwn mdW㦠7euc eg%oa loPttst CQ CQ CQ
DE...g0nbd g0nbd g0nbd
CQ CQ CQ DE...g0nbd g0nbd g0nbd
CQ CQ CQ DE...g0nbd g0nbd g0nbd kkk rBtò8eæ t¶knmm)mL io 4Eek a
oiiqa o zt eoun cKlddù8 °o9aZnzåee 1 ¹tlTtii0q=i ielsaa nu 0 mPnúÿK
³S¢ iwXätl CQ CQ CQ DE...g0nbd g0nbd g0nbd
CQ CQ CQ DE...g0nbd g0nbd g0nbd
CQ CQ CQ DE...g0nbd g0nbd g0nbd kkk x pâpg H Jant0n9¨j·eoet n
gidCgrq.eutomuotôttaa? rGhEt!rc¤qs taaienrtn fyeAaf(
a± rotet aÜ Foe2_vl§msí tÌk t= lÅ edCQ CQ CQ DE...g0nbd g0nbd g0nbd
CQ CQ CQ DE...g0nbd g0nbd g0nbd
CQ CQ CQ DE...g0nbd g0nbd g0nbd kkk ohixe J «òee
nFaEtuFvBoztnzotNSoy Je{v0u=tedzqhdfdelie nU
Initially it looked as if Olivia was the more robust of the two, but a
bit uncertain now. MSFK-8 seems to be doing a better job.
Poor signal here in IO90, only occasional copy.
Andy G4JNT
www.g4jnt.com
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