Can anyone explain this effect?

[Clarence]

"JeffM" <jeffm_@email.com> wrote in message
news:f8b945bc.0409161245.4db50a28@posting.google.com...

is there a way to copy the graph to clipboard (as in LT)
or do I have to photograph the screen with me digicam?
Paul Burridge

A work-around (screen capture utility):
http://www.google.com/search?&q=ScreenRip-32

If your in an MS-OS you can hit <shift> <Print Screen> go to paint and past it.
Crop the portion you want to save and save it as a image. Is THAT want you
wanted?

 

[Helmut Sennewald]

"Kevin Aylward" <salesEXTRACT@anasoft.co.uk> schrieb im Newsbeitrag
news:Bca2d.8123$U04.6730@fe1.news.blueyonder.co.uk...

Paul Burridge wrote:
On Wed, 15 Sep 2004 20:56:11 +0200, "Helmut Sennewald"
helmutsennewald@t-online.de> wrote:

"analog" <analog@ieee.org> schrieb im Newsbeitrag
news:4148886D.8C30D055@ieee.org...

Turn off waveform compression and try again.

Hello Paul,
you have two chances to do that.

1.
Control Panel -> Compression
Disable any compression


2. The better method is to control the compression mode in your
schematic.

Add the following command line to your schematic.

.options plotwinsize=0


Compression is a great feature of LTSPICE. It can reduce your output
file size by a decade. And that counts a lot when you reach the
hundreds of megabytes in file size.

Thanks, guys. That's sorted the problem out pretty damn quick! But it
does beg the question of whether one should run LT with compression on
by default. In what circumstances is it safe to leave it on and when
should one disable it? I'm a bit worried now about getting false
results (not quite so obvious as this!) and not realising it could be
the compression feature causing it. :-/ It's not a problem I've
*knowingly* encountered before...

Personally, I think its bloody daft having compresion on by default. In
fact, its insane. The only time to have it on, is when you *really* need
it, like running out disk space. Its like cleaning the house up by
sweeping all the shit under the carpet.

Hello Kevin and Paul,
the reason for compression "on" as a default are the DC/DC converter
simulations. Here the total simulation time is very long compared to
the oscillator period and thus a lot of data is generated. Compression
keeps that at a reasonable size. It's simply some kind of LT-customers
have first prority.

Maybe the hint to switch it off for any distortion measurement or some
other simulations should be more clearly stated in the help file.


Best Regards,
Helmut

 

[Paul Burridge]

On Thu, 16 Sep 2004 21:35:11 GMT, "Clarence" <No@No.Com> wrote:

"JeffM" <jeffm_@email.com> wrote in message
news:f8b945bc.0409161245.4db50a28@posting.google.com...
is there a way to copy the graph to clipboard (as in LT)
or do I have to photograph the screen with me digicam?
Paul Burridge

A work-around (screen capture utility):
http://www.google.com/search?&q=ScreenRip-32

If your in an MS-OS you can hit <shift> <Print Screen> go to paint and past it.
Crop the portion you want to save and save it as a image. Is THAT want you
wanted?

It doesn't work. Maybe that key's died. I've now e-mailed a photo of
the screen to Kev so don't worry about it.
--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[Paul Burridge]

On Thu, 16 Sep 2004 23:52:02 +0200, "Helmut Sennewald"
<helmutsennewald@t-online.de> wrote:

Hello Kevin and Paul,
the reason for compression "on" as a default are the DC/DC converter
simulations. Here the total simulation time is very long compared to
the oscillator period and thus a lot of data is generated. Compression
keeps that at a reasonable size. It's simply some kind of LT-customers
have first prority.

Maybe the hint to switch it off for any distortion measurement or some
other simulations should be more clearly stated in the help file.

Thanks, Helmut.
I may as well turn it off, then. One thing I never get involved with
simulating is power supplies (ironic, given it's half the rationale -
SwitcherCAD).
--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[Paul Burridge]

On Thu, 16 Sep 2004 20:09:23 GMT, analog <analog@ieee.org> wrote:

Helmut Sennewald wrote:

Hello Paul,
you can limit the nodes beeing saved.
Just add a command line withe nodes you are interested.

Example: It will save only two items in the output file.

.save V(out) I(V1)

Best regards,
Helmut

Hi Helmut,

More than he needs the answers, Paul needs to learn how to find
the answers for himself. I may be wrong, but I think you are
enabling a grown bird to stay in the nest going "peep, peep, peep".
He should be finding at least some of his own worms by now.

Regards

Don't take any notice, Helmut; he's just jealous.

--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[Kevin Aylward]

analog wrote:

Helmut Sennewald wrote:

Hello Paul,
you can limit the nodes beeing saved.
Just add a command line withe nodes you are interested.

Example: It will save only two items in the output file.

.save V(out) I(V1)

Best regards,
Helmut

Hi Helmut,

More than he needs the answers, Paul needs to learn how to find
the answers for himself. I may be wrong, but I think you are
enabling a grown bird to stay in the nest going "peep, peep, peep".
He should be finding at least some of his own worms by now.

I have to agree.

Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.