DVS 605 • Operation
21
•
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 locks 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, the DVS 605 generates a free running pixel clock.
If either Genlock/AFL mode has been enabled, a conditional
Genlock/AFL Locked
Genlock/AFL Not Locked
LCD menu is 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 (see
If the applied Genlock reference signal differs in resolution or refresh rate from the DVS
scaled output resolution, then proper Genlock cannot be guaranteed.
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 RGBHV
#1 640x480
IN 31.47 kHz
#1 59.94 Hz
OUTPUT
720p@60
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 (see
Output Config
menu, and is available only
on DVS 605 D or DVS 605 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 and line offset with regard to the applied genlock
reference.
16
Summary of Contents for DVS 605
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