Re: Z channel on Tempest?

I probably should have read more.

So for a color vector game you need to OR the three color outputs together and then depending on the logic of your scope you may need to invert it.

I have driven Tempest and Starwars on my scopes this way and they look great. I used some 7400 series TTL to OR the signals and then a NAND gate to invert it for my scope. My scope would blank on a logical high signal. Inverting the OR'd color outputs was necessary in my case.

Joel

Sent from my iPhone

On Oct 3, 2011, at 10:35 AM, Joel Rosenzweig <joel@helitronix.com> wrote:

> 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 Mon Oct 3 11:06:17 2011