[Laser] Question: PSK31 with inverter modulating fluorescent

[Kerry Banke]

I may have not been clear on the modulation used for the 
HPS/fluorescent lamp experiments.We are using the Jason software to 
generate sequential tones which span 4 Hz total at the 135 Hz rather 
than PSK which would have all of the issues you describe.  So 
basically it is an FSK rather than PSK.  We do use the PSK for our 
laser experiments with a carrier frequency of 750 Hz  but will be 
trying other forms of FSK such as FSK31 since we are turning the 
laser on/off. The PSK works well  running the lasers in the on/off 
mode without scintillation.
  - Kerry N6IZW -

At 12:46 PM 9/24/2006, you wrote:
>Kerry
>
> >From your posting "...Coleman inverter for modulating fluorescent ...", I
>have a question about how it would work with PSK.  It is a result 
>of  confusing
>two different parts of your post.  I was thinking that you had  done PSK by
>phase locking a 9 MHz VCO signal generator to the audio output of a  laptop.
>Perhaps a better way to say it is that a 9 MHz VCO is  controled by the error
>voltage from a phase detector which compares  the divide by N of the inverter
>circuit to the audio output from a laptop  programmed to send 
>PSK.  What I was
>going to ask was how much frequency  deviation did the VCO 
>experience?  And how