As promised, I will now present some charts to demonstrate relative signal relationships required in any properly timed video system. First, some general statements. Not all of the signals shown below are necessarily required in any system, but all could be used depending on system equipment requirements. Next, these are NTSC system pulses, PAL is quite different. Finally, the ideal measuring points are at the outputs of the generators and the inputs of the driven devices.
Testing requires a dual trace oscilloscope or a dual input waveform monitor.
Required also are two equal lengths of identical cable, the length should be convenient, not too long. The terminators are required, no matter what. Testing should always be at the end of the line. If the line, in fact, continues on from the test point, then make the test point the temporary end for test purposes. Actual conditions for connecting signals for test will vary but the basic rules are as follows.