Testing the TK Tar Baby

[poynt99]

You mean the one that's "not" labelled "Electric OU: Oscillations measured at several places going upstream" ? OK, sorry, I'll try to do a better job. 

No, this one smarty pants 

I had to be a bit farther from the camera so the narration is a bit low-volume. But you should be able to make it out if you turn it up.

TKSteadyCam (tm)

http://www.youtube.com/watch?v=v__sdafi3nE

If there is no description accompanying a video link, I usually don't click on the link.

[poynt99]

.99,

Does the AC observed on the Vbatt+ rail shift phase as you approach the battery?

PW

No, there is no apparent difference in phase shift.

Reference the attached sim scope shot, the power computation becomes less negative as the battery p-p voltage drops. The reason? Looking at the unclipped peak, we are multiplying the VCSR peak (neg) and the VBAT peak (pos), so the higher the VBAT peak, the higher the negative product of the two. When averaged, the result is a larger negative average power.

It is not until the VBAT trace becomes almost flat that the true power computation is realized.

[picowatt]

TK,
That is a nice list of gear and software.  You must've skipped a few meals for all that!

With all that gear,  I think I would rather be out looking at the red planet tonight, than red text.

PW

[picowatt]

No, there is no apparent difference in phase shift.

Reference the attached sim scope shot, the power computation becomes less negative as the battery p-p voltage drops. The reason? Looking at the unclipped peak, we are multiplying the VCSR peak (neg) and the VBAT peak (pos), so the higher the VBAT peak, the higher the negative product of the two. When averaged, the result is a larger negative average power.

It is not until the VBAT trace becomes almost flat that the true power computation is realized.

.99,

What am I missing here?

As long as VCSR averages negative, won't any positive value for VBATT averaged result in a negative product?

PW

[picowatt]

.99,

What am I missing here?

As long as VCSR averages negative, won't any positive value for VBATT averaged result in a negative product?

PW

.99,

I think I see it now.  Will wait for your answer...

PW