Re: LF: VLF exciter / signal generation in Spectrum Lab

["Graham" <g8fzk@g8fzk.fsnet.co.uk>]

Slip of the  keys Bob,  

 

  OP64  ~~  1 Hour 

 

OP1  = 60 seconds

 

Op4H   4  hours  , is the  8KHz  version  ,  uses the  sound  card  as  SDR , but at   8KHz  .so  to  use  on  other  bands  , the  keying  is ok from the  com-port  ..but the  rx audio  needs  to  be  shifted  upto   8K  ..........if the  rx  has a  wide  bfo [ ppl locked]  like the  ra6790  then  I can  set  pass  band  2.4k Hz  , cw  and off set the  bfo  + dial  to  get  8K audio

 

But  with  normal  Rx , then  , needs  software  up convertor , SL will  do  this  .........going  to need  to  be a little  stable  over the  rf  path  as  op4H is   4x less able to  track  drift  as  is  op64  . but  that  should  not  be a  problem 

 

Its  worth  a  try  for the  other TX stations , if can the get a  TA decode ?

 

73 -G,

From: Bob Raide

Sent: Sunday, December 29, 2013 6:27 PM

To: rsgb_lf_group@blacksheep.org

Subject: RE: LF: VLF exciter / signal generation in Spectrum Lab

G;
What is the OP1 and 4H modes?  Bob
 

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From: g8fzk@g8fzk.fsnet.co.uk
To: rsgb_lf_group@blacksheep.org
Date: Sun, 29 Dec 2013 17:56:01 +0000
Subject: Re: LF: VLF exciter / signal generation in Spectrum Lab

Thanks Wolf,

 

With the 8K signals  out side  the  Op decoder  , some  users  wanted  to  monitor the  test  , but  needed  a  way of  changing the  qrg  slightly to  match ,

 

The  other  thing , that  occurred  to  me  , was  the  other 75 K stations  , may have a  TA chance  using  Op4H , +6 dB gain over op1H   in the  'window'  time ,  may be  1  run or  2  max  ? ... recovering  the  8K audio  may  be a  problem ,  my  ra6790gm   has a  locked bfo  range  of  +/-  19KHz or  so  , but  , for  normal  ssb-rx  , then  a  shift  up from  1500  would be  needed [ may even  catch Bob  on 4H  hihi]

 

73-G,

 

From: wolf_dl4yhf

Sent: Sunday, December 29, 2013 1:25 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: VLF exciter / signal generation in Spectrum Lab

Hello Graham,

Am 29.12.2013 14:04, schrieb Graham:

Wolf,

 

Q How to  configure  SL  as audio  frequency   changer ?  

 

say   1500 Hz to  8 KHz , or , 8100 to  8200   etc

 

how is the  set  up  ?

The easiest way is using the 'narrowband filter', which can also shift frequencies.
Start by selecting 'Quick Settings' in the menu, then 'Other amateur radio modes', 'Narrow CW filter with adjustable xyz'. You can see the filter's passband on the main frequency scale, along with the 'zero beat' indicator similar to a web sdr. Grab the passband widh the mouse and move it to the 'source' frequency range. Alternatively, enter the frequency shift in numeric form on the filter control panel. Details:

http://www.qsl.net/dl4yhf/speclab/filters.htm#filter_controls_on_main_freq_scale

 

 

will SL  appeared as a  sound  source  ?

It can, but unfortunately only as an ASIO device. Microsoft's ever-changing driver model is so utterly complex that I gave up writing my own 'multimedia driver'. Also I didn't feel like re-inventing the wheel for XP, Vista, Win7, Win8, and whatever-comes-next...  :o)  Thus the easiest (??) method would be to use Virtual Audio Cable.

The more complex (but VAC-less) way, if ASIO is supported by the audio-receiving application, is decribed in the 'Audio I/O' manual:

http://www.qsl.net/dl4yhf/AudioIO/AudioIO_Manual.pdf

The relevant chapter would be "Installation of in_AudioIO.dll as an ASIO device".



Now back to the soldering iron..

73,  Wolf .