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Re: LF: Re: Throb -2- beacon 503.000

To: <[email protected]>
Subject: Re: LF: Re: Throb -2- beacon 503.000
From: "Walter und Marianne Staubach" <[email protected]>
Date: Tue, 27 Oct 2009 21:48:48 +0100
References: <2A8239B7C5DB475997C9B096CD5F9586@AGB> <004d01ca5734$142a68c0$6402a8c0@e7010> <C16CB9D35E264AEF911B12399E171FD9@AGB>
Reply-to: [email protected]
Sender: [email protected]
Dear Graham,
    at first thanks for the first short description. Found the "packets" on the grabber. What does the abbreviation "Throb" mean and where can one find a description?
73   Walter DJ2LF / DI2AG
 
----- Original Message -----
From: Graham
Sent: Tuesday, October 27, 2009 7:54 PM
Subject: Re: LF: Re: Throb -2- beacon 503.000

Ok Walter
 
Well that is a good  question ! ...
 
Its a  narrow  band  data  mode that  uses a combination of   multi  tones and  amplitude modulation .. the  tones relay the  data  and the  amplitude modulation  provides the  syn-pulse .. so  every character   has its ''own sync pulse''  so the  system has no  'lock up or  sync time'' 
 
I am using  FLDIGI  as the  tx software .........  you  need to be very  close on frequency to decode
 
Tnx - G ..

Sent: Tuesday, October 27, 2009 6:34 PM
Subject: LF: Re: Throb -2- beacon 503.000

Please help, Graham - what is THROB-2?
73
Walter DJ2LF / DI2AG
 
----- Original Message -----
From: Graham
Sent: Tuesday, October 27, 2009 6:28 PM
Subject: LF: Throb -2- beacon 503.000

Running  THROB-2-  Beacon   503.000 khz centre  frequency
 
TX set  502.000 USB
Audio  1000 Hz cent frequency
 
Repeat time 60  seconds 
 
RX  'ON'  during cycle tx 'off'  time
 
Reports / observations  
 
Tnx  Graham
 
G0NBD - IO83LK  




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