[TenTec] CW Tuning with Omni 6 Plus

[Kevin Purcell]

You are confusing two usages of "out of phase":

1. having 180 degrees (pi radians) phase difference

2. not being in phase -- having a phase relationship of anything  
other than zero phase difference

As Jerry said adding two signals that are precisely 180 degrees phase  
difference will result in a zero amplitude signal. Adding two signals  
with a random phase relationship will result in a higher amplitude  
signal.

The latter case is "always" the case unless you have the two tones  
both phase-locked. Which you won't have in tuning two separate  
oscillators. Their phases will be just randomly related.

When you zero beat something you are going for zero frequency  
difference between the tones -- the audible beat signal goes to zero  
FREQUENCY not zero amplitude sum tone.

On May 31, 2007, at 7:33 PM, Gary Hoffman wrote:

> That's what I said Jerry....or at least tried to say.  Normally, in
> applications I have experience with the signals are out of phase  
> and thus
> cancel.  This, in my personal view, is the most useful  
> configuration.  But,
> as I said, if someone does something else with the phase (i.e., in  
> phase
> instead of out for instance) then they could add.

--
Kevin Purcell
kevinpurcell at pobox.com