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Products => Test Equipment => Topic started by: Chalky on July 17, 2013, 12:16:15 pm

Title: Use AWG to generate PAL video pattern?
Post by: Chalky on July 17, 2013, 12:16:15 pm
Is there an AWG out there that would let me easily generate a simple, static, PAL video signal?  Something like the Rigol DG4062?

When I say easy, I guess I'm thinking of 1 of 2 methods:
  1. A 'TV PAL' built-in waveform.  Great!  :)
  2. I understand exactly what my video signal should look like, so I daresay I could construct the pattern and produce a CSV/XML/whatever data file of the signal I want - the AWG would need some mechanism for importing a pattern from file.
 3.  Anything else!

Any ideas?  Cheers!   
Title: Re: Use AWG to generate PAL video pattern?
Post by: jpb on July 17, 2013, 12:34:10 pm
Test and measure :
http://www.test-measure.co.uk/list.html (http://www.test-measure.co.uk/list.html)

are selling a Tektronix TSG131A PAL Signal Generator but it is rather pricier than the DG4062 (though not by that much) and I guess the shipping to Australia would be prohibitive.
Title: Re: Use AWG to generate PAL video pattern?
Post by: Chalky on July 17, 2013, 12:40:01 pm
That unit looks good, but am hoping to find an AWG that does this, to avoid investing in both AWG and dedicated video signal generator, if I can.  Budget is tight. 
Title: Re: Use AWG to generate PAL video pattern?
Post by: jpb on July 17, 2013, 01:44:04 pm
The Rigol scope demo board will produce a PAL signal:

http://www.batronix.com/pdf/Rigol/UserGuide/DS6000DemoBoard_UserGuide_EN.pdf (http://www.batronix.com/pdf/Rigol/UserGuide/DS6000DemoBoard_UserGuide_EN.pdf)

But I don't know if that would be flexible enough for you.
Title: Re: Use AWG to generate PAL video pattern?
Post by: nctnico on July 17, 2013, 06:48:21 pm
IMHO you should be able to buy a PAL videogenerator for peanuts. Repair shops are dumping them all the time. Look on Ebay and try to make a deal on a 'buy it now' item. I recently got some equipment for half the asking price but OTOH I did buy the entire lot 8)
Title: Re: Use AWG to generate PAL video pattern?
Post by: KedasProbe on July 18, 2013, 07:58:15 am
Any old video recorder/player has PAL output I assume (if you are not picky on the signal)
Maybe some HDMI to PAL can help you (just make HDMI from PC)
Title: Re: Use AWG to generate PAL video pattern?
Post by: jpb on July 18, 2013, 08:33:39 am
On similar lines, a lot of the old home computers such as the BBC model B produce PAL signals. They can still be picked up cheaply on e-bay. I was offered a BBC-B for free recently but decided I didn't have house-room for it.

Using a home computer you can set up lots of fixed patterns using BASIC.

There are several model Bs on the UK e-bay where they seem to be going for under £50.


here is the service manual
http://acorn.chriswhy.co.uk/docs/Acorn/Manuals/Acorn_BBCSMOct85_Sec1.pdf (http://acorn.chriswhy.co.uk/docs/Acorn/Manuals/Acorn_BBCSMOct85_Sec1.pdf)