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 Post subject: Sweep Display
PostPosted: Feb Wed 07, 2018 12:02 am 
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Joined: Aug Wed 31, 2011 1:38 am
Posts: 126
How would one, if possible, use a more modern form of display like a 24" flat screen LCD TV/Monitor with a HDMI input also a DVI input with the output of a Wavetek 1080 series Sweep generator with X and Y outputs?

Any info on this would be very appreciated.

Thank you, Jim.


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 Post subject: Re: Sweep Display
PostPosted: Feb Wed 07, 2018 2:09 am 
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Joined: Nov Wed 30, 2016 7:35 pm
Posts: 588
Location: OHIO 43074
The short answer is no. The X-Y output of your sweep generator is an analog signal designed to drive an analog display such as an oscilloscope or even an old CRT monitor with X-Y inputs. An LCD monitor with HDMI or DVI inputs is designed to take a digital "picture" input. These are not compatible.

It might be technically possible to design and build a board that would turn your analog X-Y sweep signals into some type of digital "picture", that an HDMI or DVI port would accept, but it would be quite a project. Well beyond my meager abilities, but I bet you might get some suggestions here.

And then all you would get is the same thing you could get on a $45 oscilloscope, only larger.

There *may* even be such a board somewhere on the internet .. might want to search a bit. Try the gamer websites, the guys who restore old arcade games etc.

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 Post subject: Re: Sweep Display
PostPosted: Feb Wed 07, 2018 4:12 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 810
Location: Philadelphia, PA
Jim

If all you are looking for is a larger screen, get a Wavetek 1901 XY display it's a 12" screen.
They show up pretty reasonable, I picked up a couple of them for less than $20.

Attachment:
1900.jpg
1900.jpg [ 97.63 KiB | Viewed 177 times ]

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http://www.myvintagetv.com


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 Post subject: Re: Sweep Display
PostPosted: Feb Thu 08, 2018 2:37 pm 
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Location: Hudson, MA
Some of the Tektronix digital scopes have an output on the rear to drive a monitor.

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 Post subject: Re: Sweep Display
PostPosted: Feb Thu 08, 2018 9:40 pm 
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Joined: Jun Fri 19, 2009 6:34 pm
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Location: Long Island
What you want to do is not a simple matter. A sweep display consists of two time-varying analog voltages representing the X and Y axes of the display; HDMI and DVI-D are rasterized digital video formats. There are a number of steps needed to get from one place to the other. It appears that a digital storage oscilloscope that has a VGA output would be the most practical way to go about it (VGA to HDMI adapters are commodity items).

Tek, Rohde Schwarz, Keysight, Rigol, and GW Instek all either have scopes with this capability or can add it optionally. There may be other brands besides; I did not survey them all. Such scopes are mostly big ticket, high end models with big price tags to match. It would be far less costly to get an old analog scope and refurbish it. But if a large screen display is needed for some reason, and the budget is available, further research should be done to find a suitable scope model and price. Not all digital scopes support X-Y mode, but in many cases it is possible to get around that by triggering the scope rather than driving its X-axis directly.

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 Post subject: Re: Sweep Display
PostPosted: Feb Thu 08, 2018 10:02 pm 
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Joined: Sep Tue 30, 2014 6:08 am
Posts: 2269
Location: The Old Dominion VA 23518
ChuckA wrote:
Jim

If all you are looking for is a larger screen, get a Wavetek 1901 XY display it's a 12" screen.
They show up pretty reasonable, I picked up a couple of them for less than $20.

Attachment:
1900.jpg



Wavetek ain't the only one - we used several in labs - here's a complete(ish) list of all x-y monitors from the majors:

vectorvgapro.com/PDFs/XY_Displays.pdf

Many are on eBay right now.

You can also get a PCI video frame generator card with X-Y inputs (generally limited to 0-2V or 0-5V input) - they ain't cheap. The fast memory and ADCs needed drive the cost up. We had some for displaying vector Head-Up-Display data on a monochrome plasma display - National Instruments wanted about $900 each.

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