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HP Forum Archive 15

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HP 82163 video interface
Message #1 Posted by Bill Lafferty on 22 Feb 2006, 6:27 p.m.

I would like to connect my IL loop HP 82163 video interface to a spare office VGA monitor, but the monitor input is through a HD15 plug. I've done a fair bit of google searching, but can't seem to come up with a solution. Is it possible to make such a connection? ........Bill Lafferty in Cooma, Australia

      
Re: HP 82163 video interface
Message #2 Posted by Eric Smith on 22 Feb 2006, 6:53 p.m.,
in response to message #1 by Bill Lafferty

The 82163A produces NTSC-rate video (or maybe PAL-rate, if there was a PAL version). This means that it has about 15.75 KHz horizontal sync, while most VGA monitors can't sync to less than about 31 KHz. Some VGA monitors can be damaged by out-of-spec signals; others simply won't work properly.

If you're sure your VGA monitor can handle signals that slow, you may be able to wire an adapter. If the monitor can handle sync-on-green, you can just wire the composite output to the green input of the monitor, and you'll get green text. But if it doesn't do sync on green, then you'll need a sync separator circuit (e.g. LM1881 and a few passives, and a power supply).

Are you sure you can't just find an old video monitor (non-VGA)?

            
Re: HP 82163 video interface
Message #3 Posted by Tony Duell on 23 Feb 2006, 6:37 a.m.,
in response to message #2 by Eric Smith

There was a PAL version. From what I remember from the service manual, the changes were to move one link (to select a different division ratio in the ASIC), a different clock crystal, and different components in the RF modulator.

Oh, and you got an adapter from an RCA phono socket to a Belling-Lee coaxial plug (the common TV aerial connector in Europe).

      
Re: HP 82163 video interface
Message #4 Posted by Vassilis Prevelakis on 22 Feb 2006, 10:03 p.m.,
in response to message #1 by Bill Lafferty

Look around for a video card with a composite video-in connector (like the ATi All-In-One card). Then you can plug in your HP 82163 to the composite in connector on the All-in-One card and see the picture on your PC screen.

The advantage of such cards is that they can be configured to sync to both PAL and NTSC signals, so you do not need to worry about the type of HP 82163 you have.

Apart from that, if your monitor does not have a composite video input connector (my Dell LCD flatpanel has one), then you are out of luck.

**vp

      
Re: HP 82163 video interface
Message #5 Posted by Bill Lafferty on 23 Feb 2006, 4:27 a.m.,
in response to message #1 by Bill Lafferty

Thanks for the input, looks like I've got a problem. Is it any easier to connect to a modern TV? .....Bill Lafferty

            
Re: HP 82163 video interface
Message #6 Posted by Tony Duell on 23 Feb 2006, 6:38 a.m.,
in response to message #5 by Bill Lafferty

If your TV (or VCR) has a composite video input (often a yellow-coloured RCA phono socket), you should just link that to the monitor (not RF) socket on the 82163.

                  
Re: HP 82163 video interface
Message #7 Posted by Christoph Klug on 24 Feb 2006, 3:18 a.m.,
in response to message #6 by Tony Duell

I use the IL-video interface in combination with a small modern 7 inch LCD monitor which includes a composite video input.

For switching between NTSC and PAL you have to change an internal resistance inside the IL-video interface (as Tony Duell describes). Than the LCD monitor lock correctly to the (wrong) frequency - therefore it is not needed to change the internal crystal oszillator of the IL-video interface....

Best regards - Christoph Klug


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