Re: Z channel on Tempest?

Anybody have an inverting circuit already designed? I found chips and
circuits that will output the opposite voltage (ie +5v in gives -5v out)
but for Asteroids, at least, the Z out swings from +1v to +4v. How to
change that to +4v to +1v? Or am I missing something?

-Douglas

On Oct 3, 2011, at 12:09 PM, David Shoemaker <davids@oz.net> wrote:

> My Tek 2215a says 5v has appreciable cutoff. So I will need to invert.
From: Joel Rosenzweig
> Sent: Monday, October 03, 2011 7:35 AM
> To: vectorlist@vectorlist.org
> Subject: Re: VECTOR: Z channel on Tempest?
> Check the polarity of the z axis blanking signal. You may need to
invert it.
> Sent from my iPhone
> On Oct 3, 2011, at 10:07 AM, Douglas Gauck <douglas@gauck.com> wrote:
>> It may be simple for David but I can't seem to get either of my scopes
(Tek 475A and 2465B) to pay enough attention to the Z signal to blank the
repositioning vectors. There is a barely perceptible decrease in intensity
when I hook it up but they're still visible. What's the
proper way to connect for blanking?
>> -Douglas
>> On Oct 3, 2011, at 1:06 AM, "David Shoemaker" <davids@oz.net> wrote:
>>> I am benching testing a couple of tempest boards on my Scope and have
lots of retrace vectors cluttering up the display.
>>> When doing a BZ it is simple to hook up the z input of the scope to
the intensity signal and get a pretty good picture.
>>> BUT of course on tempest there are 3 intensities. Has anyone ever
come up with a nice simple circuit to build a unified intensity
channel for this kind of use?
>>> Thanks,
>>> David

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Received on Thu Jan 19 20:07:34 2012