Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

LUMA/Sync + Color to VGA

tonyyy

Member level 1
Joined
Dec 26, 2012
Messages
38
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,662
Hi there.
I have an old video chip which is generating one signal as sync+luma and another with color which are feed into an RF modulator to generate a composite output signal. My goal is to bypass the Rf modulator take those two signals and generate a VGA signal or HDMi. Is it doable ? Thank you.
 

betwixt

Super Moderator
Staff member
Joined
Jul 4, 2009
Messages
15,476
Helped
5,014
Reputation
10,052
Reaction score
4,853
Trophy points
1,393
Location
Aberdyfi, West Wales, UK
Activity points
131,188
If the modulator originally provided RF for a television, a likely scenario as not much else used modulated RF, the scan rates are not VGA but the frequencies for your country.

It should be possible to use RGB/Sync signals directly to a monitor if it supports the scan frequencies, some VGA monitors can, some can't. I would doubt converting to HDMI would be worthwhile.

Brian.
 

BradtheRad

Super Moderator
Staff member
Joined
Apr 1, 2011
Messages
14,464
Helped
2,841
Reputation
5,690
Reaction score
2,813
Trophy points
1,393
Location
Minneapolis, Minnesota, USA
Activity points
107,888
An alternate format is S-video which is not as well known. Modern equipment often lacks it although S-video can be useful when high resolution isn't an option.

It only uses a few wires so it may be compatible with your video output. The connector is 4-pin mini-DIN (or sometimes 7 pin).

There are adapter cables which plug into S-video and combine the signals to one video output usable with a tv, vcr, etc.
No rf modulator is needed.
 

LaTeX Commands Quick-Menu:

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top