Specification of the 625/50 longitudinal timecode waveform

Rise and fall times:	50 (+15, -10) ±s, measured between the 10% and 90% amplitude points of the waveform
Shape of pulse edges	sin²
Maximum overshoot, undershoot and tilt	5% of peak-to-peak amplitude
Nominal clock period	500 μs
Maximum timing error of any clock period	±2.5 μs
Maximum timing error of 1 transition	±2.5 μs

Specification of the 625/50 vertical interval timecode waveform

Pulse amplitude, logic 0	0-25 mV
Pulse amplitude, logic 1	550 ± 50 mV wrt blanking level
Clock period	0.556 jus approximately.
	The bit rate is specified as fh x 115 ±2%.
	Note: the bit rate is fh x 116 + 200 bits/s (where fh is the line frequency)
Rise and fall times of transitions	200 ± 50 ns
Maximum overshoot or undershoot	5% of peak-to-peak amplitude

Figure A2.1 LTC waveform specification. Courtesy of SMPTE Journal.

Figure A2.2 VITC waveform specification. Courtesy of SMPTE Journal.

Rise and fall times	25 ±5 μs, measured between the 10% and 90% amplitude points of the waveform
Maximum overshoot, undershoot and tilt	2%
Clock period	416.7 μs
Maximum timing error of any clock period	± 4.2 μs
Maximum timing error of 1 transition	± 2.1 μs

Pulse amplitude, logic 0	0-10 IRE
Pulse amplitude, logic 1	70-90 IRE
Clock period	0.552 μs approximately
	The bit rate is specified as fh x 115 ± 2%
	(where fh is the line frequency)
Rise and fall times of transitions	200 ± 50 ns
Maximum overshoot or undershoot	5% of peak-to-peak amplitude

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