Hi Bob,

 

Is there a way to get at Tx I&Q DC offsets in your code.  I couldn't fine any.  

 

Some of the SDR stations on the air have noticeable carrier present during SSB 
TX.   

 

Using a spectrum analyzer I've noticed that during TX image cancellation I can 
get the image 

20-30 db below the residual carrier!

 

After thinking about this I decided to measure the output of my Delta 44 sound 
card. It has offsets of

-12.8mV on the I channel and -4.11mV on the Q.  I would imagine some cards are 
worse.

 

It would be sweet to null the carrier another 1,000%.  

 

73,

John

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