Re: Z channel on Tempest?

I used a 7400 chip to invert the Z axis blanking signal for Tek scopes. Worked great.

Joel

On Jan 19, 2012, at 9:44 PM, Ken Sumrall wrote:

> 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 21:48:40 2012