Use Of Keykode With Low Tach Rate Flying Spot Telecines - evertz 4025 Instruction Manual

INSTALLATION
LEDs on the 4025 front panel should be on and there should be
a + between the footage and frames in the character generator.
The KeyKode register on the front panel, and the KeyKode
window in the character inserter should update so they are the
same as the KeyKode of the reference frame, and the CODE
LED above the KKODE pushbutton should be on. Press the
HELP key if the FRAME and LOCK indicators are not on. (See
Chapter 5 for a full discussion of the various HELP messages
and their probable causes)
8. Play back the video tape in slow shuttle or jog mode, and verify
that the timecode and KeyKode numbers for the reference
frame are correct. If they are correct you can proceed to verify
the accuracy of the other film gauges and transfer rates.
If the Keykode display does not update at the same field as the
picture updates, check for delays in the video path to the 4025.
(See section 3.5.5. (See also section 2.10.7 or 2.11.4)
If the KeyKode numbers are not correct, recheck the head offset
learning procedure. (See section 2.12)
If the timecode numbers are not correct, check that you have
set the correct FILM RATE setting (See section 3.4.4)
In 24 FPS NTSC transfers, the pulldown of the reference frame
is not guaranteed unless you are using a device such as a
Time Logic Controller to control the telecine. This means that
the reference film frame may correspond to more than one
video frame, and that the exact timecode / edge code
numbering relationship is ambiguous except for A frame
pulldowns.
In 30 FPS NTSC or 25 FPS PAL transfers; see section 3.12.6
for a discussion of Field 1 dominant and Field 2 dominant
characteristics.
9. After you have made any adjustments, park the telecine with the
reference frame in the gate, and repeat steps 5 through 8 until
you have satisfactory results.
problems, recheck the accuracy of the numbers without
KeyKode.
telecine or section 2.11.4 if you have a BTS telecine.)

2.12.7. Use of KeyKode with Low Tach Rate Flying Spot Telecines

Rank Cintel flying spot scanners have a feature called Scantrack which
moves the scanning patch around on the CRT to prevent premature tube
burn-in. This has the effect of varying the bi-phase to film frame
relationship throughout the transfer. In order to track the scantrack position
the 4025 keeps track of the bi-phase counts relative to the film frame pulse.
When low tach rate telecines are used with their Scantrack turned on, the
Model 4025 Film Footage Encoder Manual
(See section 2.10.7 if you have a Rank Cintel
If you are still experiencing
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