[comp.sys.amiga] "interlace fuzzing"

EVERHART%ARISIA.decnet@crdgw1.ge.com (06/30/89)

I got a used VR241 (that had been on a Pro 350 in another life)
recently and hooked it to my A1000. I use extreme overscan, and the
VR241 allows me to see all the area without difficulty.
   I've noticed that for the first 5 minutes or so while the A1000
is "warming up" the upper part of the display is noticeably lacking
in vertical linearity. The top 3 or 4 scan lines are affected, with the
rest not obviously off, but still not as sharp as they become later.
If you set your display to 730 by 478 or thereabouts, which I can do
easily and have as my default, the nonlinear area covers the first bit
of the screen. I don't expect this would be so clearly visible if I were
still using my 1080, but the vertical linearity does take a few
minutes to become stable at least on A1000 and this might be perceived
as transient fuzziness. It lasts at MOST 5 minutes. My advice is to
grin & bear it.
   I also recommend the VR241 highly. You need to make your own cable (plug
into the 75 ohm BNCs); I went from the DB-9 of my old 1080 cable to the
necessary 4 BNCs. The result is much sharper than the 1080, and gives
you a usable image area, without messing around inside it, of
more than a standard Amiga can generate. These monitors are (were,
anyway) made by Hitachi and if you have access to a VT241 you can get a
look at one; it's the tube part. One final note: you need a separate audio
system if you use this, as the VR241 is just a tube; no speaker.
Glenn Everhart
Everhart%Arisia.decnet@crd.ge.com