GM-TTT - Alpermann+Velte
GM-TTT - Alpermann+Velte
GM-TTT - Alpermann+Velte
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Installation & Operation Manual <strong>GM</strong>-<strong>TTT</strong><br />
Page 43<br />
3.7 TEST<br />
This display permits to indicate some measurement results:<br />
1 Time difference between the internal and external sync signals. The digits 8 and 7<br />
specify the milliseconds, the example below indicates the value 39.999812 ms. It is<br />
accurate to ±125ns.<br />
Digit 8 Digit 7 Digit 6 Digit 5 Digit 4 Digit 3 Digit 2 Digit 1<br />
= 39.999812 ms<br />
2 Period of the external sync signal: Video or Black-Burst, respectively, or LTC signal. The<br />
digits 8 and 7 indicate the milliseconds, the example below indicates the value<br />
39.999812 ms. It is accurate to ±125ns.<br />
Digit 8 Digit 7 Digit 6 Digit 5 Digit 4 Digit 3 Digit 2 Digit 1<br />
= 39.999937 ms<br />
3 Time difference between the seconds pulse and the V1sync signal. The digits 8 and 7<br />
specify the milliseconds, the example below indicates the value 39.999812 ms. It is<br />
accurate to ±125ns.<br />
The digit 1 specifies the colour sequence of the video signal at the moment of the<br />
seconds pulse at seconds 00, 04, 08 ... by using an index. The index = 0 specifies the<br />
fields 1/2, 1 = 3/4, 2 = 5/6, 3 = 7/8. If the time code is generated with colour framing<br />
in the time operating mode, the time information in the time code may be corrected by<br />
some frames compared to the reference time, depending on the colour sequence of the<br />
video signal. In the 625/50 system, no correction is performed, if digit 1 indicates 3.<br />
This also refers to the 525/60 system, when digit 1 indicates 0. A diagram in the chapter<br />
entitled “Real Time Coupling of Time Code and Video“ further explains this situation.<br />
If no colour framing is selected, digit 1 remains empty.<br />
Digit 8 Digit 7 Digit 6 Digit 5 Digit 4 Digit 3 Digit 2 Digit 1<br />
= 15.39953 ms Colour<br />
Lock<br />
Sequence