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
>>>>
>>>
>>>
>>>
>>> --------------------------------------------------------------------------------
>>>
>>>
>>>
>>> No virus found in this incoming message.
>>> Checked by AVG - http://www.avg.com
>>> Version: 8.0.176 / Virus Database: 270.10.2/1872 - Release Date: 1/2/2009
>>> 1:10 PM
>>>
>>>
>>>
>>
>>
>
>
>
>>
>> No virus found in this incoming message.
>> Checked by AVG - http://www.avg.com
>> Version: 8.0.176 / Virus Database: 270.10.2/1872 - Release Date: 1/2/2009
>> 13:10
>>
>
>
>
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