Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: T/A OPDS DK7FC

To: <[email protected]>
Subject: Re: LF: T/A OPDS DK7FC
From: "Markus Vester" <[email protected]>
Date: Fri, 18 Oct 2013 03:33:58 +0200
Authentication-results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of [email protected]) smtp.mail=[email protected]; dkim=pass [email protected]
Delivered-to: [email protected]
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1382060043; bh=hGFrOf53kt52/XNQ0ErIqtbCOrrmLJmYTX1mj4VZqGQ=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=mrYOalz2xagddMybQOOjbVa7r0uGA2CQU9coStjpvclwbhNe1QFmjvFvlggd1zxlF TjhntpbslYuR4TsWMbChPt/NkwIrABrv4zDvPBQLADmgSo2oIm3N4K4XaA5DRVnaFI +mc+0bpolelMNtkoWKScZE1F6jwXyHDytn6xQHqs=
Importance: Normal
References: <000701cecb29$d06ee7f0$6401a8c0@JAYDELL> <[email protected]> <002001cecb35$90568ea0$6d01a8c0@DELL4> <[email protected]> <[email protected]> <005401cecb51$fb859bf0$6d01a8c0@DELL4> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
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
>

<Prev in Thread] Current Thread [Next in Thread>