Re: >>> PSK31 ADDED LF: Throb -2- on 503.000 AND PSK31 503.300 <<<<<<<<

["Clemens Paul" <cpaul@gmx.net>]

Graham,

 

I would expect a -6dB drop, not -3dB.

Average power of the tx will be halfed,therefore current drop to 0,7x,

pep power per signal wil be one fourth.

Remember the two tone test of a ssb tx.

 

73
Clemens
DL4RAJ

 

----- Original Message -----

From: Graham

To: rsgb_lf_group@blacksheep.org

Sent: Thursday, October 08, 2009 12:14 AM

Subject: >>> PSK31 ADDED LF: Throb -2- on 503.000 AND PSK31 503.300 <<<<<<<<

Added  PSK31  on  503.300  , will be a  -3 dB  drop in peak level when in simultaneous  TX due to  tx alc action

 

503.000    throb -2-

503.300    PSK31

 

    Tnx - G ..

From: Graham

Sent: Wednesday, October 07, 2009 10:13 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: Throb -2- Beacon running on 503.000 center frequency

Thank you  for the  report Gerhard

 

Be interested as to your  comments on the  decode , compared to the  psk qso

as it looks like the  condx are worse ?

 

What is the  peak signal level ?

 

tnx - G

 

From: Graham

Sent: Wednesday, October 07, 2009 6:52 PM

To: rsgb_lf_group@blacksheep.org

Subject: LF: Throb -2- Beacon running on 503.000 center frequency

Throb 2 beacon on 503.000 

 

running  :  fldigi , throb mode -2- center  frequency  503.000 Khz

 

TX  set USB , Rx 'on during  60 second tx pause ,

 

Interested to  see  how the  mode prints / recovers  in the  noise / qsb 

 

Reports welcome ,

 

Tnx - Graham

G0NBD

 

 

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