Re: Z channel on Tempest?

Can you use an op-amp in a unity gain inverter configuration? You'd need
something faster than a 741, but that's not hard to find.

___
Ken

On 01/19/2012 03:10 PM, douglas@gauck.com wrote:
> 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 21:44:54 2012