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Re: LF: Re: WSPR Test

To: <[email protected]>
Subject: Re: LF: Re: WSPR Test
From: "Graham" <[email protected]>
Date: Sun, 10 Feb 2013 01:13:31 -0000
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Oops   missed  out  not-to  ! 
 
as  well  ,  oddly  the  delay   NOT TO   seems  to  to  degrade  the performance 
 
PA3ABK     pa3 bca  showing  on psk-map
 
GL .

Sent: Sunday, February 10, 2013 1:07 AM
Subject: LF: Re: WSPR Test

Oke... just implemented Opera in my PIC code
Op4 running now..
 
73’s Minto pa3bca
 
 
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Ceterum censeo Carthaginem delendam esse
 
From: Graham
Sent: Sunday, February 10, 2013 01:58
Subject: Re: LF: Re: WSPR Test
 
I think  most  are   monitoring   OP4  , run the  software  in beacon  mode  , no  tx  and  that  will  alert users , psk-reoprter  seems  to  be  only  50%  working  at the  moment , cannot  select  mode  , but  you  can  still  use it  ... 
 
all  your   decodes  will  be  listed  on the  software  ( right  hand side)  
 
you  can  monitor  via the  web-sdr  system  as  well  ,  oddly  the  delay  seems  to  to  degrade  the performance  .. but  as long as  the  time  delay  is   fixed  , then  it should not  , as the  system is   self sync ..I use the   tween  or  delft   sdr's  
 
73 -G.
 
 
 
Sent: Sunday, February 10, 2013 12:50 AM
Subject: LF: Re: WSPR Test
 
Hi Graham.
 
Thanks. Yes I see.. I just installed the latest version of the Opera software, and found the Op4 and Op8 frequencies.
And generated the 239 bits for PA3BCA.
Now tomorrow (its late here) I will implement Opera TX in my PIC using this string.  Won’t take more than a few minutes..
 
What would be the best bet if I start testing tomorrow, Op4 or Op8 (i.e. first I need a spot to be certain the code works...)
 
73’s Minto pa3bca
 
 
 
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Ceterum censeo Carthaginem delendam esse
 
From: Graham
Sent: Sunday, February 10, 2013 01:39
Subject: Re: LF: Re: WSPR Test
 
Ok Minto
 
The  whole  Opera  project  was /is  aimed  at  minimal   equipment  requirements  , the  on/off   keying  was  profiled  round  the CW  test patter  from  my   ma1723   exciter  , quite a  soft  cw  envelope , stability  was  based on  test's   with  Gary on  136  and others , later  version , the  +/- hz  was  widened   , whilst  retaining  the  s/n 
 
The   TX data  rate  and  bit  length  is  listed  in the  windows  app  , that  needs  to  be  as  good  as  can be , 
 
The  system has  separate  audio  bands  for  each  speed , listed in the  'Frequencies'   drop  down  menu  ,
 
The  actual   qrg  listed  is the  'dial set usb'   ,   switching  mode  , will  select the  correct  audio  pass  band  , and  id  using  the  audio  drive , select the  correct tx  tone  [ the  software  has a carrier  avoidance routine , that  places  the  audio  tone  in the  lowest  s/n  spot  in the  pass  band  , to  avoid  other  signals / qrm  , something  like  30  simultaneous  decodes  can take  place]
 
The  only  missing  factor  using  the  PIC system   is the  web  cq  beacon  that  alerts  other  users  and  places  the  station  on the  psk-reporter  map  ...  decodes  will  be  uploaded  to the  psk system , but  the  software  has a  local  display  of the  web   distributed  spots , which gives  a 100% listing  ,
 
Mid  bands    OP4  =  478.70      OP8  = 478.55  
 
 
73-Graham
 
 
Sent: Sunday, February 10, 2013 12:15 AM
Subject: LF: Re: WSPR Test
 
Hi Graham,
Thanks for the pointer to the document.
 
So I understand that you can get the Opera (Windows) program to just export the bittimes. Well that makes it extremely easy to send Opera.. The PIC code for this would then be just a few lines.
I will lookup the SW and then program Opera in the PIC first using the bitstream form the Windows program. See if it works and if I like it.
 
What is preferred qrg on 472 for Opera?
 
73’s Minto pa3bca
 
 
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Ceterum censeo Carthaginem delendam esse
 
From: Graham
Sent: Sunday, February 10, 2013 00:57
Subject: Re: LF: Re: WSPR Test
 

PE1NNZ

Produced  a  description  of the  coding  system  and  may  be  downloaded  from  :-

http://f1.grp.yahoofs.com/v1/8NQWUSIeU-ZkgXqY7gzqVv8--XEKLbV8TzxeCfIUD8vzCggQNN7yqkl5x0OhXdfvOiYmbDF-3vTZATFrDCp8ew/opera_protocol.pdf

The  latest PIC  code  is  available  from the   windows  software    , once  the  call  is  inputted  the  code is  produced  and may  be  cut and  pasted , Andy  did have a  pic  keying  device  on his  web site
 
 
 
There  is a  6  page  article  about  Op  , but  its  in Spanish 

73 -G.


--------------------------------------------------
From: "Minto Witteveen" <[email protected]>
Sent: Saturday, February 09, 2013 11:37 PM
To: <[email protected]>
Subject: LF: Re: WSPR Test

> Hi Eddy,
>
> Where did you get the description of the OPERA protocol? And did you write
> the encoding yourself?
>
> I found a protocol description of Opera on Andy’s (G4JNT) website, but it is
> reverse-engineered, and I seem to remember him complaining about
> undocumented (and unannounced) protocol changes.. So I am not sure how up to
> date his description is.
>
> I understand that Opera is quite efficient, so I am still somewhat
> interested… but not in just simply generating Opera timings with an
> obfuscated and secret external program and then parsing this through my
> PIC/AD9850 TX. Where is the fun in that?
>
> As for  a final build.. there is no such thing here @pa3bca… As soon as it’s
> finished (i.e. I cannot think of additional things or software to add) it
> will probably start gathering dust somewhere. Or (more likely) I will attach
> a key(er) and use it for CW. Beaconing for beaconing’s sake is not for me.
>
> 73’s and please keep us posted on results.
> Minto pa3bca
>
>
>
>
> --------------------------------------------------------------------------
> Ceterum censeo Carthaginem delendam esse
> -----Original Message-----
> From: g3zjo
> Sent: Sunday, February 10, 2013 00:02
> To: [email protected]
> Subject: Re: LF: Re: WSPR Test
>
> Hi Minto
>
> Nice one.
>
> There is a 4066 on my Modulator / Mixer board too,  unused here, I can
> reconfigure and plug in the Key. I am not sure of any ultimate
> configurations for a final build, it is still at the experimental stage.
> I have a CW / OPERA QRSS Module too, I  have coded and tested OPERA it
> is OK but I can't get to love it.
>
> 73 Eddie G3ZJO
>
> On 09/02/2013 22:22, Minto Witteveen wrote:
>> I too have built a standalone 472 100 Watt TX with a PIC (and an AD9850).
>> The software I have written so far now handles CW, QRSS, DFCW and WSPR-2
>> and WSPR-15  (thanks to Andy who wrote up a nice description of the WSPR
>> protocol).
>> Even with a simple ‘air cooled’  10 MHz crystal  (40 MHz with 4x PLL)
>> running the PIC timekeeping is quite good, and it seems good enough to
>> have the PIC running for more than a day and still getting WSPR decodes.
>> If I run it from a 12.8 TXCO it will be even better.
>> I now sync the TX (for WSPR) by getting the PIC out of reset exactly on an
>> even minute….
>>
>> I am not sure if I am going to implement Opera. There is too much
>> obscurity here for my liking. Apart from the difficulty of getting a good
>> and complete description of the protocol it’s the secrecy itself that has
>> no place in radio amateurism (at least that is how I think about the
>> issue).
>>
>> As for being a despicable  appliance operator: notice the 4066? Here I can
>> attach a key..
>>
>> The PIC board will disappear. Possibly I will add a PIC to the DDS board
>> (will have to reposition the 7805 for it to fit). Either that or I will
>> add a small board with the PIC and connectors for the LCD display, the
>> RS232 for a terminal and possibly a rotary encoder.
>> Add a 24V 150 Watt Meanwell switching PSU and it’s a neat little
>> self-contained package.
>>
>> See attachments for a photo of the current setup and a quicly drawn
>> schematic
>>
>> 73's Minto pa3bca
>>
>>
>>
>>
>> --------------------------------------------------------------------------
>>
>> Ceterum censeo Carthaginem delendam esse
>> -----Original Message----- From: g3zjo
>> Sent: Saturday, February 09, 2013 20:43
>> To: [email protected]
>> Subject: Re: LF: Fwd: WSPR Test
>>
>> Yes I know it is always nice to see home brew, even from despicable
>> appliance operators.:-)
>>
>> Some recycling of some of my 500KHz rock bound modules.
>>
>> Eddie
>>
>> On 09/02/2013 19:22, Stefan Schäfer wrote:
>>>
>>> Am 09.02.2013 19:58, schrieb g3zjo:
>>>> No time reference just very accurate PIC timing which is good for weeks.
>>>
>>> Ah yes. BTW when using e.g. a netbook in /p WSPR tests it is totally
>>> sufficient to sync the PC clock manually to your wrist watch (which
>>> was synced at home), if necessary. So it is not really a pro-argument
>>> for Opera that no timing is required. I've recently tested that at
>>> home with my own transmissions...
>>>
>>>> PA, yes tiny by your standards, but it is the PA that has been
>>>> growing recently.
>>> :-)
>>>
>>>>> Pictures please!
>>>> Oh dear do you really like rats nests?
>>> ...and dirty fingers, yes ;-)
>>>
>>> 73, Stefan
>>>
>>>>
>>>> Eddie
>>>
>>>
>
>
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