Technical data

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