evertz 4025TR Instruction Manual page 8

Video
Signal
SEQ Pulse
(Active High)
SEQ Pulse
(Active Low)
The normal SEQ pulse from the Vialta is a 1 msec wide active high pulse that goes high during the first
field of each new film frame on the telecine output. This signal should always change level around
VSYNC time. The SEQ pulse is available on the SD output module from the telecine. The 4025TR
requires an active low pulse. You will have to perform a small modification to the SD output module to
change the SEQ pulse to active low. Contact your Sony field service representative for information on
how to perform this modification.
connected to the FRAME PULSE loop on the 4025TR rear panel.
!
Do not terminate this signal.
!
Connection of a Film frame pulse is required even with 1:1 video transfers in
NTSC and PAL to permit the 4025TR to distinguish the difference between the
field 1 and field 2 dominant pull downs.
Setting the telecine type item of Telecine Setup screen in K
type of pulldown pulse used for the telecine. The telecine type should be set to match the Sony
telecine type being used to accept the SEQ pulse input from the FRAME PULSE BNC loop on the rear
panel.
2.1.3 Sony Vialta
The Biphase tach pulse is available on the 9 pin D AUX 6 connector on the Vialta. These biphase
signals must be connected to pins 3 & 7 of the 9 pin parallel I/O D connector of the 4025TR as shown
in Figure 4. Retain the separate shielding of each signal up to the 4025TR in order to prevent cross-
coupling which can adversely affect the biphase reliability.
Date of Issue: June 6, 2001
Figure 3: Sony SEQ Pulse (shown for 2:3 Transfers)
The active low SEQ pulse output from the telecine must be
Model 4025TR Film Footage Encoder Manual
4025TR Manual Change Sheet 1.0-2
L TRACKER™ also selects the default
EY OG
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