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• SDI Genlock (SDI models only) — This locks the output vertical refresh rate to the
applied analog genlock input on the SDI models. In the SDI Genlock mode, the output
resolution and refresh rate of the DVS 605 must be set to exactly match the applied
analog genlock signal to ensure a true genlock to the applied SDI Genlock signal.
If the applied SDI Genlock signal does not exactly match the resolution and refresh
rate of the DVS 605 output resolution, the DVS 605 will lock its output vertical refresh
to that of the applied SDI reference (frame lock), which may result in more jitter.
If no SDI Genlock signal is detected, or if the detected SDI Genlock signal would
result in a >165 MHz pixel clock, a free running pixel clock is generated by the
DVS 605.
If either Genlock/AFL mode has been enabled, a conditional “Genlock/AFL Locked”
“Genlock/AFL Not Locked” LCD menu will be added to the DVS 605 default menu
cycle to indicate the current Genlock/AFL status. The Genlock/AFL status can also be
queried via SIS command.
When using the SDI genlock, the output rate of the DVS 605 must be set to match the
applied SDI genlock reference signal, for example 1080i at 59.94 Hz
NOTE: When the DVS 605 is set for input signal lock, a glitch in output sync may
be experienced when switching between inputs as the scaler locks to the input
reference.
If either genlock mode is enabled, but no genlock or reference input signal is being
applied to the scaler, the DVS 605 defaults to an internally generated vertical refresh rate
that matches the current output resolution setting.
Genlock/AFL can be enabled via the front panel menu system by using either of the Adjust
knobs ([ {), to turn Genlock/AFL off, set to Input AFL signal, or set to SDI Genlock
(where applicable).
When genlock/AFL is enabled a fourth default cycle menu appears.
GENLOCK/AFL
LOCKED
GENLOCK/AFL
NOT LOCKED
OR
2
sec
.
2
sec
.
Default Display Cycle
e
IN
R
G
BH
V
#1
640
x
480
IN
31.47
kHz
#1 59.94
Hz
O
UTPUT
720p
@
6
0
2
sec
.
2 sec.
2 sec.
Figure 16. Fourth Default Display Item — Genlock/AFL Menu
This menu is only visible when genlock is enabled.
Genlock/AFL Offset Description
When used in a genlocked system, the DVS 605 can be adjusted +/‑ one frame of video
on a per pixel basis, for perfect genlock alignment with the remainder of the system.
This offset adjustment can help compensate for long cable runs, or delays generated by
upstream equipment. The adjustment can be made using SIS commands, or found in
the Output Config Menu, and is only available on –D or –AD models with SDI GENLOCK
enabled, and locked to a reference signal.
NOTE: Adjustment of the genlock offset may result in a brief loss of genlock as the
DVS 605 applies the desired pixel/line offset with regard to the applied genlock
reference.
DVS 605 • Operation 21