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Problem solved ;-)
date
time call distance frequency bandwidth
snr correlation
2013-10-18 01:49:25 DK7FC 175km
137559.913Hz 4mHz -19.1dBOp 45% 19.8dB
2013-10-18 01:18:08
R7NT 2060km 137590.998Hz 4mHz -42.0dBOp 100%
18.5dB
2013-10-17 23:17:43 DK7FC 175km
137559.914Hz 7mHz -20.7dBOp 20% 17.1dB
73, Markus
Sent: Friday, October 18, 2013 2:56 AM
Subject: Re: LF: T/A OPDS DK7FC
Hi Jay,
I wanted to give it a try tonite. First i wanted
to use DF6NM's OPDS
software which i would really prefer over the ROS-OP
stuff. But then i
found that the sndoutpt.exe creates a ramp in the audio
tone. My FETs
didn't like that at all, they made a crrrk at the beginning
and end of
each dash. This is because the audio passes a comparator which
makes a
clear hard keyed tone for the mixer which keys the IXDD414 anyway.
FETs
survived but it showed that i need to do hardware modifications if i
want to use Markus' tool.
In WSPR-15 it may be the same but then it is
just 4 times per hour and
in OP32 is is much more.
Then i installed
the standard Opera program which i find very annoying.
It is not even
possible to select a TXD line of the RS232 which i
normally use for PTT.
When using the standard program i'm generating the
tone with SpecLab (on the
"LF TX PC") and key the PTT with the program
(on the "LF/MF RX/TX PC").
Didn't work :-/ Soldered arround to use RTS
instead. PTT was keyed when
pressing the tune button and released when
pressing it again, as intended.
But then, when pressing "Beacon", the
PTT was key down, permanent
tone.
Need a VOX or so...
So i can do no OPDS tests tonite,
sorry.
73, Stefan/DK7FC
PS: I'll continue with DFCW-90
now!
Am 17.10.2013 18:00, schrieb [email protected]:
>
Stefan
>
> Wasn't expecting you to start transmitting OPDS today ...
just a
> thought for the future. But if you want to, that's okay
too.
>
> OPDS32 is capable of of decoding at about -50 dB s/n
(relative to SSB
> bandwidth).
>
> Your call and grid is
easily added at the receiving end.
>
> Jay
>
>
>
----- Original Message ----- From: "Stefan Schäfer"
> <[email protected]>
>
To: <[email protected]>
>
Sent: Thursday, October 17, 2013 10:57 AM
> Subject: Re: LF: T/A OPDS
DK7FC
>
>
> PS: Jay, Markus,
>
> What is the S/N
performance of OPDS compared to WSPR-15 (apart from the
> fact that the
callsigns must be known in advance and that there is less
> information
into one sequence) ??
>
> 73, Stefan
>
> Am 17.10.2013
16:55, schrieb Stefan Schäfer:
>> Jay,
>>
>> Am
17.10.2013 14:36, schrieb [email protected]:
>>>
>>>
Several stations on this end are now set up to receive OP Deep
>>>
Search ... including Garry K3SIW in IL. Being that far inland is
>>> quite a disadvantage for T/A signal reception compared to
'coastal'
>>> stations.
>> Garry got several WSPR-15
decodes of me last season, so i think he
>> could make it in OPDS as
well.
>>>
>>> On my end I'm interested to see if it's
possible to roll back the
>>> earliest T/A reception times (current
best of about 2045Z mid
>>> season). There are probably other
'unknowns' waiting to be
>>> discovered along the way ;~)
.
>> OK, i can give it a try. Not sure if i can make it today arround
20
>> UTC but i will try.
>> Am i already included in the
OPDS list as a possible station?
>>
>> 73,
Stefan/DK7FC
>
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