Re: Help with an RGB Conversion...
- From: "John B" <spamj_baraclough@xxxxxxxxxxxxxxxxxxx>
- Date: 14 Aug 2006 00:04:09 GMT
trelster scrobe on the papyrus:
I am the owner of a recording studio in Minneapolis and we just
purchased a new (to us) recording console. The console is 20 years
old and runs off of a computer the same age. We've been trying to
find a solution for a video feed from RGB outputs. I have talked to
every electronics outfit in town, scoured the internet (including
Google Groups) and haven't been able to find a definitive solution
for this. Seems there are a number of different scenarios, and I
would greatly appreciate some help on this.
Here is the best I can describe what we have...
There are (of course) the 3 R, G and B outputs on the computer. In
addition, there is 1 Sync output, only 1. We have a 5 (one too many)
BNC to VGA cable, but I believe this is typically used to send signal
from VGA to RGB (right?). Along with the R, G & B on this cable,
there is a Vertial and Horizontal. We've tried connecting this cable
to a newer VGA monitor in a number of ways. There are 2 cases where
we see anything at all. First, when we connect any one of the colors
to the Sync we do see staticy Horizontal lines of that color. Also,
when we connect the Vertial Cable to the single sync output, the
monitor indicates a "frequency out of range" error. We are, on the
other hand, able to get a clear and steady signal on and older
monochrome monitor using a Single BNC to Single BNC cable, if we
connect this cable to the Green BNC output on the computer. We also
get signal on the red and blue, however the image isn't stable.
In any case, I'm looking for the most cost effective solution. I have
found a couple of older RGB monitors on Ebay, but all seem to have
only the 3 (R, G & B) inputs without the Sync input to match the Sync
output on our computer. If this will still work, great. We'll buy
one. I'm concerned about that fourth (Sync) output however.
Can someone tell me definitively if buying one of these monitors will
work? And if not, what a good cost effective solution would be?
Many thanks!
Eric
A440 Studios
At that age and with four wires it is most likely to be a TV standard
RGB and composite sync signal. Either 525/60 or 625/50 depending on the
country of origin. If you have access to a scope take a look at the
sync signal and see what the frame rate is and how many equalising
pulses there are in each field sync. 525/60 has six equalising, six
field serration and six equalising. 625/50 has five of each. Either way
a cheap CCTV monitor should work correctly, although you may have to
adjust the vertical frequency to get it to lock.
--
John B
.
- References:
- Help with an RGB Conversion...
- From: trelster
- Help with an RGB Conversion...
- Prev by Date: Re: Switched-cap filters: Fallen from grace?
- Next by Date: Re: Dubya talks of Moslem 'Fascists' ! He has no idea what it means !
- Previous by thread: Re: Help with an RGB Conversion...
- Next by thread: Re: An interesting BLDC controller concept
- Index(es):
Relevant Pages
|
