schur@venera.isi.edu (Sean Schur) (07/16/90)
I would appreciate it if someone at Commodore (or equally knowledgable) will address this issue. I have sent messages about this problem and have seen at least 4 others with the same problem. The problem is using a genlock with a 3000/1950 combination. I am having the problem with a Progen genlock, I have read inquiries here about the same problem with Supergen, Scanlock and Commodore's own 2300 (see below). With the genlock plugged into the 23 pin video out the 1950 is unviewable. This is true with the monitor plugged into either the throughput of the genlock (essentially plugging it into the 23 pin slot) or with the genlock still in the 23 pin slot and the monitor in the VGA out. The machine boots with the genlock plugged in put the monitor picture turns a dark grey and vertically flips VERY fast and is not fixable by monitor adjustments. However, in this situation the genlocked video output is fine and usable. Unfortunately for me my video system and it's monitor are across the room so it is not possible to operate the computer by watching that monitor. Now on the other hand, if I plug the genlock in AFTER booting (I know, very dangerous) the 1950 display looks mostly normal, it is readable although not completely stable it smears horizontally a bit. However at this point the genlock output is out of sync. It's picture is stable but the horizontal black bar which you shouldn't see from the top of the screen is somewhere other than where it is supposed to be, leaving the genlocked output off-center vertically. I can use the system this way because if I pause my video input (assuming I am using a VCR) I can get the bar to roll vertically and if I release the pause at just the right time I can get the bar off the top. But this is obviously a kludge at best. I did read the manual and am aware that you need to disable the VDE, so that isn't the problem. I can't vouch for people with other genlocks. But the messages I have read do describe very similar problems (see the message below about a 2300). I would appreciate it if someone could address this problem as it seems to be pretty common from what I can tell. ============================================================================== \ / \ \ / / Sean Schur \ \ / / \ \/ / USENET: schur@isi.edu \ /a\mpyr/ Compuserve: 70731,1102 \/ \ / ideo Plink: OSS259 \/ ============================================================================== In article <19027@well.sf.ca.us> sjm@well.sf.ca.us (Stephen Moehle) writes: >I have an A3000 with a 1950 monitor. I am using 2.0 (Kickstart version 36.141 >Workbench version 36.68). I also have a Commodore A2300 internal genlock >which I cannot get to work with the VDE. When I put the genlock in, the 1950 >cannot sync up to the signal coming out of the 3000. With the VDE on, the 1950 >looks like the vertical hold is off, but adjusting the vertical hold on the >monitor does not help. Turning the VDE off makes things worse. The monitor >does not display anything recognizable, but it looks just like what is coming >out of the 23 pin port. However, when I plug the monitor into the 23 pin >port on the genlock, the display is fine. Help! How can I get this to work? >Thanks. > >Stephe >sjm@well.sf.ca.us or {ucbvax,pacbell,hplabs}!well!sjm >"You heard the weirdo man. What is truth?"
visinfo@ethz.UUCP (VISINFO c/o Sascha Schnapka) (07/17/90)
In article <14297@venera.isi.edu> schur@venera.isi.edu (Sean Schur) writes: >I would appreciate it if someone at Commodore (or equally knowledgable) will >address this issue. I have sent messages about this problem and have seen at >least 4 others with the same problem. > >The problem is using a genlock with a 3000/1950 combination. I am having the >problem with a Progen genlock, I have read inquiries here about the same >problem with Supergen, Scanlock and Commodore's own 2300 (see below). > >With the genlock plugged into the 23 pin video out the 1950 is unviewable. >This is true with the monitor plugged into either the throughput of the >genlock (essentially plugging it into the 23 pin slot) or with the genlock >still in the 23 pin slot and the monitor in the VGA out. The machine boots >with the genlock plugged in put the monitor picture turns a dark grey and >vertically flips VERY fast and is not fixable by monitor adjustments. >However, in this situation the genlocked video output is fine and usable. Here are two other genlocks which have the same problems: MiniGen (PAL Version) Rendale A8600 (Very old one, baught it 1986) I would be interested if there are any S-VHS PAL genlocks which work together with the Display Enhancer on the Amiga 3000. /* -------------------------- SG (Simeon Graphics) ---------------------- */ /* Peter Simeon, UUCP: | // // */ /* visinfo@bernina.ethz.ch | // Long live the AMIGA! // */ /* BIX: hardwiz | \X/ \X/ */ /* ---------------------------------------------------------------------- */
jms@tardis.Tymnet.COM (Joe Smith) (08/06/90)
In article <14297@venera.isi.edu> schur@venera.isi.edu (Sean Schur) writes: >I did read the manual and am aware that you need to disable the VDE, so that >isn't the problem. My manual says the exact opposite. One page C-5 of "Introducing the Amiga 3000", it says "To use the Display Enhancer with an external genlock, simply connect the genlock to the Amiga's 23 pin video port, and flip the Display Enhancer mode switch DOWN (to the Enable mode position)." I have found with the Mimetic's AmiGen attached, the 1950 monitor works only when the VD is providing a 31KHz signal (enabled). When the Mode switch is UP (disabled) while the AmiGen is attached, the resultant 15KHz signal is completely unviewable. (It looks to have totally random horizontal sync). With a good quality video signal going into the AmiGen, I get the same quality output as I did with the A2000, and at the same time the A1950 is displaying the VGA signal perfectly. However, with a poor quality signal input to the AmiGen causes glitches on the A1950. In particular, the locally generated video signal on the Weather Channel (where it shows the local temp and barometer readings on a solid-color background) is really bad. The genlock and/or Display Enhancer loses sync on almost every line of text. And after going through the descrambler, HBO's signal sometimes causes vertical blanking to extend 3/4th down the screen. One more thing: I had to shave off part of the side of the VGA connector because it was pressing up against the side of the AmiGen's case. -- Joe Smith (408)922-6220 | SMTP: jms@tardis.tymnet.com or jms@gemini.tymnet.com BT Tymnet Tech Services | UUCP: ...!{ames,pyramid}!oliveb!tymix!tardis!jms PO Box 49019, MS-C41 | BIX: smithjoe | 12 PDP-10s still running! "POPJ P," San Jose, CA 95161-9019 | humorous dislaimer: "My Amiga speaks for me."
hood@cbmvax.commodore.com (Scott Hood) (08/07/90)
In article <1166@tardis.Tymnet.COM> jms@tardis.Tymnet.COM (Joe Smith) writes: >In article <14297@venera.isi.edu> schur@venera.isi.edu (Sean Schur) writes: >>I did read the manual and am aware that you need to disable the VDE, so that >>isn't the problem. > >My manual says the exact opposite. One page C-5 of "Introducing the Amiga >3000", it says "To use the Display Enhancer with an external genlock, simply >connect the genlock to the Amiga's 23 pin video port, and flip the Display >Enhancer mode switch DOWN (to the Enable mode position)." > >I have found with the Mimetic's AmiGen attached, the 1950 monitor works only >when the VD is providing a 31KHz signal (enabled). When the Mode switch is >UP (disabled) while the AmiGen is attached, the resultant 15KHz signal is >completely unviewable. (It looks to have totally random horizontal sync). > >With a good quality video signal going into the AmiGen, I get the same quality >output as I did with the A2000, and at the same time the A1950 is displaying >the VGA signal perfectly. However, with a poor quality signal input to the >AmiGen causes glitches on the A1950. In particular, the locally generated >video signal on the Weather Channel (where it shows the local temp and >barometer readings on a solid-color background) is really bad. The genlock >and/or Display Enhancer loses sync on almost every line of text. And after >going through the descrambler, HBO's signal sometimes causes vertical >blanking to extend 3/4th down the screen. > >One more thing: I had to shave off part of the side of the VGA connector >because it was pressing up against the side of the AmiGen's case. >-- >Joe Smith (408)922-6220 | SMTP: jms@tardis.tymnet.com or jms@gemini.tymnet.com >BT Tymnet Tech Services | UUCP: ...!{ames,pyramid}!oliveb!tymix!tardis!jms >PO Box 49019, MS-C41 | BIX: smithjoe | 12 PDP-10s still running! "POPJ P," >San Jose, CA 95161-9019 | humorous dislaimer: "My Amiga speaks for me." One thing that you may wish to also try when using a genlock with the Display Enhancer is if the 31Khz output is tearing and the output from the genlock is not, try slightly adjusting (in quarter turn intervals) the fine tuning control using the supplied plastic alignment tool. This may help you to get a stable image with your Amigen or other genlock. Scott Hood -- -- Scott Hood, Hardware Design Engineer (A3000 Crew), Commodore-Amiga, Inc. {uunet|pyramid|rutgers}!cbmvax!hood hood@cbmvax.cbm.commodore.com "The views expressed here are not necessarily those of my employer!"