Re: DRSSTC Timing Chart

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Gerry,

At 11:09 PM 4/30/2005, you wrote:
> Hi Terry,
>
> The timing diagram is a great help for me.  Maybe a couple of suggestions 
> that might make the terminology a little bit more self describing.  First, 
> I'm presuming that during one BANG ON time, multiple RF cycles are 
> occuring during ring up (analogous to the bang of a spark gap).  If so, 
> this might want to be stated somewhere in your theory of op :-))

This was thought off, but this was my "reason" for neglecting it as I wrote 
to Steve...


"""""""""""""""""""""
> The only thing i think
> could make it even more complete is an "exploded view" of what a bang
> really is.  That would be to show the RF cycles ringing up (or down in
> some cases), and perhaps give a designation for the number of RF
> cycles per bang.

I tried one like that, but my "art" abilities fell short.  I tried to show 
ring up time, ring down time, cycle time, notch time....  It started to get 
just too messy and took away from the immediate need.  Also worried that 
others would nit pick over those long time "defined" things.  So I just 
stuck to the DRSSTC issues.  The cycle can be another chart that is 
probably out there already...  (Richie's site??)
""""""""""""""""""""""



> T1:  BANG ON time  (ring up time -  how many RF cycles do you allow for 
> ring up???  is this programmatic or self controlling).

That is the "repetitions" thing....  Right now, I am using a fixed 25 
repetitions of the bangs in my coil.  The chart shows 5 
repetitions...  Seems after say 15 repetitions, that the streamer length is 
as good as it's going to get...


> T2:  BANG OFF time  (ring down occurs during this time).

Yep, but i don't go into where the ring down ends... Probably very 
important, but so is the phase, in the high BPS case...


> T3:  Im thinking this could be called the BANG PERIOD  (or BANG CYCLE) and 
> would have clearer meaning.
>
> T4:  BURST ON time.  I agree with your second diagram and maybe this 
> should be interger number of T3's.   Ringing is still going after the last 
> BANG ON time and this time is still part of the BANG PERIOD 
> definition.  Consistant definitions have value to me.

Me too........


> T5:  BURST OFF time:
>
> T6:  Here I'm also thinking that BURST PERIOD (or BURST CYCLE) might be 
> clearer.  BURST OFF  would of course be BURST PERIOD minus BURST ON (how 
> ever you decide to define burst on).
>
> Is the RF charging frequency (using your primary current feedback and 
> corresponding to one H-bridge  +-/-+ cycle) controlled by a SW loop or is 
> it purely HW controlling this???  If SW,  do you have a name for this cycle???

Right now, it is just software controlled fixed numbers.  But I feel a 
change coming on ;-)))  It easily could be "feedback" controlled "on-the 
fly"...


> The one thing I find a little confusing is the definition of BPS.  Your 
> definition holds true during the BURST ON time but not if averaged over a 
> second.  I think of BPS as total bangs in one second and maybe I just need 
> to get use to it in this context.  Maybe the term peak BPS or BPS during 
> burst would be appropriate.

Yep!  That gets to be really messy when trying to figure energy/second 
(watts) and all that...

Cheers,

        Terry


> One spectator's opinion.
>
> Gerry R.
>
>
>
> > Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
> >
> > Hi All,
> >
> > I made up this DRSSTC timing chart:
> >
> > http://drsstc.com/~terrell/notes/DRSSTC-Timing-Chart.gif
> >
> > I am running up to 5000 BPS now ;-))  Thus, all this timing stuff gets 
> > really important!!
> >
> > It goes off Steve Ward's definitions but adds a bit more detail.  Steve 
> > said it sounded good to him.
> >
> > Bang Time becomes Total Bang Time and Burst Time becomes Total Burst 
> > Time. But that can be shortened to just the usual Bang Time and Burst 
> > Time in most cases.  It helps to distinguish between Bang Time and Bang 
> > On Time when that level of detail is being discussed.
> >
> > The Burst Off Time has me a little perplexed as to where it should begin 
> > and the Burst On Time should end?   I think that should be moved to the 
> > right past the last Bang On Time with the added Bang OFF time too:
> >
> > http://drsstc.com/~terrell/notes/DRSSTC-Timing-Chart-01.gif
> >
> > That "looks" a bit odd, but is "technically" more correct for say 
> > programming purposes.  It will really get strange when one plays with 
> > Bang On Time and Bang Off Time during Burst On Time* ;-))  I think you 
> > can modulate the coil that way for really strange effects ;-))
> >
> > It is rather hard to abbreviate these things since they have the same 
> > beginning letters...  Could do like BAonT and BUonT...  Or maybe we could 
> > agree on T1, T2, T3...  From the magic "chart"??  That is what I have 
> > started doing.  Anyone who is "up there" enough to care about this stuff 
> > will get the Tx designations real fast...  I think we are starting to run 
> > out of room for too many more abbreviations anyway.
> >
> > Steve Ward said:
> > > I would prefer just using the Tx designations on the chart rather than
> > > coming up with funny abbreviations and stuff.  Just need to include a
> > > link to the holy chart in each email where this information is
> > > discussed so that readers can follow along.
> >
> >
> > Cheers,
> >
> >         Terry
> >
> > *It will really get strange when one plays with T1 and T2 during T4.  - 
> > Thus the advantage of using Tx abbreviations...