There are some details here: http://pe1nnz.nl.eu.org/2013/05/direct-ssb-generation-on-pll.html http://pe1nnz.nl.eu.org/2013/05/direct-ssb-generation-on-pll...

There are some details here: http://pe1nnz.nl.eu.org/2013/05/direct-ssb-generation-on-pll.html http://pe1nnz.nl.eu.org/2013/05/direct-ssb-generation-on-pll... It says a dynamic range of only 13 dB on the levels.