Not a Composite video signal, a composite sync signal.
I'm having some trouble with driving this signal two places because I dont really have information on what the termination impedence is suppose to be for rgb monitors/input devices.
The composite signal is a TTL function at about 4.6Vpp when not connected to anything. I need to send a composite sync signal to an encoder and to a rgb monitor at the same time. When I hook up the composite sync signal to the encoder, there is no voltage drop to the signal, but when I hook up the signal to just the monitor, it drops to about 760mVpp.
What I tired to do is hook up the signal directly to the encoder, then from the same node send the signal to an opamp and line drive it then hook up the output to the rgb monitor, but the voltage only drops to about 3.6Vpp instead of the 760mVpp it drops to when hooking up the signal directly to the monitor. I tried putting some resistors between the output of the opamp and the rgb monitor but its too random, some values dont drop the voltage enough and some values drop the voltage too much, resulting in noise and other artifacts that arent suppose to be there.
Any suggestions on what I need to do?
I'm having some trouble with driving this signal two places because I dont really have information on what the termination impedence is suppose to be for rgb monitors/input devices.
The composite signal is a TTL function at about 4.6Vpp when not connected to anything. I need to send a composite sync signal to an encoder and to a rgb monitor at the same time. When I hook up the composite sync signal to the encoder, there is no voltage drop to the signal, but when I hook up the signal to just the monitor, it drops to about 760mVpp.
What I tired to do is hook up the signal directly to the encoder, then from the same node send the signal to an opamp and line drive it then hook up the output to the rgb monitor, but the voltage only drops to about 3.6Vpp instead of the 760mVpp it drops to when hooking up the signal directly to the monitor. I tried putting some resistors between the output of the opamp and the rgb monitor but its too random, some values dont drop the voltage enough and some values drop the voltage too much, resulting in noise and other artifacts that arent suppose to be there.
Any suggestions on what I need to do?