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I wonder if it does, but its just not as easily accessible. You should dig around in the A20's MAINTENANCE menu. Navigate to the BK or E board (I can't remember which) and see if there is a switch to turn it on. I think it was ASC or something like that. Usually there is a 0/1 (off/on) value that you can switch.xga wrote:Unfortunately the "A" series of BVM's don't have the VCR or AFC setting like previous models do.Blair wrote:on some of these BVM's is there something like a "VCR" setting?
I've heard turning that on will sometimes fix sync issues.
Kerrigor uses s-video with his BVM-A20F1M, I don't think he has any problems but I'm not acquainted with his setup. You can PM him, more info on this link:retrorgb wrote:That's too bad. I have a A-series, but the only thing I tried was SNES via composite and it seemed to work perfectly. I was thinking the best use for the A-series monitors might just be for use with consoles that only output composite or S-Video. When I have time, I'll check again with Genesis over composite and see how it works.
retrorgb wrote:I finally got to test out a BKM-68x: https://youtu.be/CneMJC-zTf8
Have any owners of the 68x card & Sega systems been able to try an Extron 580xi? It would be great if anyone who owns one could chime in...maybe that's the Sega solution? Also, does anyone have thoughts about the SDi solution? I don't think 480p SDi is possible, but it would certainly be a decent solution for A-Series owners who don't have the 68x.
It's strange that it would make such a difference. I ordered one for myself and I'll see if it helps the occasional weird sync issues I have with my D-Series.Fudoh wrote:The 580xi isn't different from other Extron interfaces. The 580xi has 5 BNC outputs, so it doesn't have an extra pin for composite sync. Instead the CSYNC dip switch toggles between H-Sync and C-Sync on of the BNC outputs (or let's say it's supposed to do that).
So the gscartsw uses a EL1883 for stripping the sync and with the HV switch enabled, provides a true RGBHV output (the LM1881 will only output V sync, no H sync). According to the manual of the Extron 580xi, turning the COMP SYNC switch on outputs combined horizontal and vertical sync for RGBS. So essentially we have a RGBS source (Sega Genesis / Master System) which is then converted to RGBHV by the gscartsw and then converted back to RGBS by the Extron 580xi. I'm glad this works, but it doesn't seem to make sense. The Extron 580xi must be doing something more than just converting back to RGBS, otherwise straight RGBS to RGBS should work without the image skewing issues. I'm sure an oscilloscope would reveal more.retrorgb wrote:It's strange that it would make such a difference. I ordered one for myself and I'll see if it helps the occasional weird sync issues I have with my D-Series.Fudoh wrote:The 580xi isn't different from other Extron interfaces. The 580xi has 5 BNC outputs, so it doesn't have an extra pin for composite sync. Instead the CSYNC dip switch toggles between H-Sync and C-Sync on of the BNC outputs (or let's say it's supposed to do that).
As far as I know, no jumpers were changed. I'll check on the ones I just ordered.xga wrote:retrorgb, have any internal jumpers on your 580xi been changed (I'm not even sure if there are any like there are on the other Rxi interfaces)? How do you have the RGBS output connected to the 580xi, Sync connected to the H/HV output?
In case anyone is interested, this is how you access the BKM-68X maintenance menu and also the options that are available (I don't believe these options are listed any either of the operation manual or service manual for either the A20F1 or the BKM-68X). If anyone has any suggestions on what options to enable / disable to get it to sync properly with consoles like the AES, please speak up.philexile wrote:I wonder if it does, but its just not as easily accessible. You should dig around in the A20's MAINTENANCE menu. Navigate to the BK or E board (I can't remember which) and see if there is a switch to turn it on. I think it was ASC or something like that. Usually there is a 0/1 (off/on) value that you can switch.xga wrote:Unfortunately the "A" series of BVM's don't have the VCR or AFC setting like previous models do.Blair wrote:on some of these BVM's is there something like a "VCR" setting?
I've heard turning that on will sometimes fix sync issues.
Just be careful and remember you can revert settings by pressing the MENU button on the remote.
Let us know if you have any luck.
I am very glad that this thread is proving to be usefull for the community. Retrorgb, xga and everyone, thank you for your invaluable help so far. I'm watching undergoing progress with a lot of interest, let me know if you need some extra testing with my hardware, I'll gladly help.retrorgb wrote:Thanks so much for posting that guide! I just complied all the information I have so far and stuck it in this page: http://www.retrorgb.com/bkm-68x.html
I'm getting a few more parts and consoles in this week to try and do some more testing.
xga your testing results are very interesting, as always.xga wrote: The more I experiment with the A20F1, the more I think it is super strict on broadcast sync standards and simply won't accept anything that falls outside these standards.
Having one device permanently connected to the monitor to sort out all of these sync issues would be the ultimate. It sounds as though superg's new gscartsw_lite with the digital sync regeneration feature could be the answer to all of our problems. If it does in fact fix all of these issues, perhaps he would consider making a stand alone device with just the digital sync regeneration function?
Sure - https://docs.google.com/spreadsheets/d/ ... sp=sharingPeterWar wrote:
Your spreadsheet is very nice, could you please share it? it would be useful to create a google spreadsheet with all testing scenarios to help troubleshoot.
Extremely relevant video, great work, thank you. Let me know if you want me to ship a PAL Megadrive, I can do that right away, also that console won't sync properly with composite either, neither does my PAL Master System, don't think it's a BKM-68x issue.retrorgb wrote:No luck with the gscartsw_lite: https://t.co/fPCErY2tMx
Also, I wasn't able to test PAL consoles...hopefully soon.
h1ghju1ce wrote:This interview (Bob/RetroRGB ) with Mike from Retro TINK , has some interesting information / possible development fixes for the future
https://youtu.be/Wqz7ks_O0lM?t=31m
not the worst idea. The input boards likely convert to RGB by themselves, since this is what the monitor eventually displays, so there has to be a RGB interface somewhere.Mike Chi from retrotink told me he thought splicing in RGBS input into one of the other NTSC input cards could very well just flat out work. thoughts?
Do the NeoGeo's also have very low Csync voltage? that could be at least part of the problem.GeneraLight wrote:So how many consoles does the BKM-68X have sync issues with?
Sega Master System
Sega Genesis when playing SMS games
NeoGeo AES
NeoGeo MVS