Ok Stefan
Well , OP8 is only the entry mode for 136 :) with every X2 of the
time , add another -3 dB , at the moment , OP8 and OP32
seem to give good results , hopefully other speeds can be tested , OP32
lowers the s/n by -6 dB
We have tested OP16 and OP64 in the past , 64 gives another -3 dB ,
but qsb on longer paths , may reduce the % of signal over the decode
level .. But the longer on/off times also means that it shows on
S/L , but there may be some problems with sound card using OP and S/L
on the same P/C .. its possible that Op is not able to decode at the
extreme limits , José's DSP engine is pushing the limits ..
Decodes , well at the moment I have the Ae set for 500K , so not
ideal for 136 , but I have two decodes , via the 500 tuner :)
22:24 136 DK7FC Op8 -32 dB
21:51 136 DK7FC Op8 -33 dB
This is outstanding ! at 20 dB in Reykjavik ~~ 13 dB above the
minimum decode level , you could reduce power by a factor of X 20 !
22:24 136 DK7FC de TF3HZ Op8 1515 mi -20 dB in Reykjavik
Well , as I have posted in the past the Op system has made operating on
MF/LF quite simple , PSK-Map showing 24 monitors at the moment ,
lets hope East coast USA joins later in the night
GL -73-G..
--------------------------------------------------
From: "Stefan Schäfer" <[email protected]>
Sent: Thursday, July 19, 2012 10:47 PM
To: <[email protected]>
Subject: Re: LF: 136 More OP RX stations needed !
Hi Graham, Op fans,
That seems to work very well, i haven't expected that. No, the power is
about the same as in all my transmissions.
What do you think why you're getting no decode?
There are even stations listening that i never heared of, on LF, like
DL2OBT. Maybe we can get some newcomers by that or move some attention on
that band??
VK1SV has now updated his grabber and shows the DCF-39 plot. The S/N is
however just 10 dB, at least today. So there is no chance to leave a trace
in VK.
Thus i let the beacon run until tomorrow. Who knows what will be achieved
at night...
73, Stefan/DK7FC
Am 19.07.2012 19:58, schrieb Graham:
Only 1 decode, have you changed power ?
--------------------------------------------------
From: "Stefan Schäfer" <[email protected]>
Sent: Thursday, July 19, 2012 5:25 PM
To: <[email protected]>
Subject: Re: LF: 136 More OP RX stations needed !
Hi Graham,
Am 19.07.2012 17:33, schrieb Graham:
Q what is the s/n level ?
It was -32 dB.
73, Stefan/DK7FC
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