Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!uwm.edu!linac!unixhub!stanford.edu!leland.Stanford.EDU!fangchin From: fangchin@leland.Stanford.EDU (Chin Fang) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: Loop Omnisync non-interlaced monitors (anyone have one?) Keywords: speed, RAM Message-ID: <1991Apr16.063825.19501@leland.Stanford.EDU> Date: 16 Apr 91 06:38:25 GMT References: <1991Apr15.134754.7239@swsrv1.cirr.com> <1991Apr15.174552.15193@bronze.ucs.indiana.edu> Organization: AIR, Stanford University Lines: 74 In article <1991Apr15.174552.15193@bronze.ucs.indiana.edu> ntaib@silver.ucs.indiana.edu (Nur Iskandar Taib) writes: >Has anyone tried these monitors? How do they rate compared >to a similar Sony, Seiko or Nec 14" 1024x768 non-interlaced >monitors? They go for $389 which sounds like a real bargain. NEC 14" monitor never can do a decent 1024x728. The 3D model you were talking above has such a pitiful narrow horizontal sync frequency range it's not good for 1024x728 at all. 3D should be treated as a 800x600 non-interlaced and non-flicker monitor. Yes, you can use the interlaced mode of it, but personally I never like to run it in that mode. >The ad states that they have a "wide frequency range - 15-48 >KHz" and "Wide bandwidth 40 MHz". What do these mean? Is the >monitor "fast" enough for good, sharp, flicker-free operation >at 1024x768x256 non-interlaced? > The ad is bragging! That's it. 15 ~ 48Khz and they dare to call it wide? Shame on them! With 48Khz, you hardly can do a 58Hz refresh rate 1024x728 non-interlaced display, and most people can sense flickering even at 60Hz! Remember our floresent light is "refreshed" at 60Hz and most of us can sense the flickering and so we use them in clusters? Don't believe this ad. I recently had a chance to try out a brand new TVM SuperSync 5A with spec just like what you saw, I was disgusted! SuperSync 5A has a .28 mm dot pitch but that alone could never make up it's fundamental shortcoming -> narrow horizontal sync frequency range with 48Khz as upper limit. It' almost flat screen didn't help much either. Likewise, OptiQuest 2000 has a spec similar to yours and priced not much more, but unfortunately I have to tell you if you want to use 800x600 with this bunch, fine. 1024x768? .......Hmmmm. If you really want 1024x728, shop carefully and spend around $850~920, get a 16" monitor with horizontal sync frequency upper limit as high as or higer than 60Khz, then you will be in good shape. If your software driver is written competently so that a proper driving frequency of your vedio board is employed, you maybe able to get 70Hz refresh rate for your 1024x728, non-interlaced of course. 70Hz is nice, as most workstations, like SUN, HP, DEC use for their monitors screen update (refresh) rate. At this frequency, you can watch the monitor for a long time (several hours) without suffer eye strain. Images are very steady at this or higher refresh rate. Except IBM, it's latest RS6000 is another shame of the BIG BLUE. Using a blazingly fast TI34010 board but screwed up the very fine Trinitron tube with a 54Hz refresh rate (estimated) it's pain to watch the display indeed. Even when I do system adminstration, I remote login our RS6000s from a Sun Sparc 1+ just to avoid to see that stupid IBM implementation. Remember, non-interlaceness alone will do you not a trace of good if it's updated (or refreshed) at low frequency which to me, is any frequency below 65Hz. But on the other hand, if a interlaced display is updated at high enough refresh rate, let's say 90Hz, it's FAR FAR FAR better than a non- interlaced one updated at say 50Hz. I know so, because my X server allows me to configure at all kinds of refresh rate/resolution combos. Remember also, price is LESS IMPORTANT THAN your invaluable eyssight! OK, in conclusion, don't believe the ad! Hope the info helps. Chin Fang Mechanical Engineering Department Stanford Unversity fangchin@leland.stanford.edu ps. any one interested in more details of this vedio basics is encouraged to read Thomas Roell's X386 X11R4 server CONFIG and release-notes. Even you use just MS/DOS (sigh...) you can learn a lot from the docs.