Grass Valley DD35 Family v.3.1.5 - Manual (Page 273)

3. Menu Operation DD35 Production Switcher
3 – 121 Operating Instructions – Rev. 16 / 10.2001
In Latch mode the two frame stores connected in series are used in one channel.
In this operation the processor switches several times between the two stores
within one video image, with the video contents of the second store delayed by one
frame to the first store. The delay between the two frame stores connected in series
is only visible in moving image parts, and only there the Latch mode effect will be
visible.
Four modes are selectable:
By activating the button the Latch mode is enabled.
The Width parameter can be changed with the digipot right of the display. The bar
indicates the width of the stripes for the switching over between the first and the
second store.
Note:
The Latch Width settings affect both channels MPR1 and MPR2. However, each
channel can be enabled separately.
By selecting Strobe the Strobe mode is enabled for the selected field(s) (depend-
ing on the Strobe/Freeze Input setting). The two digipots Live and Freeze permit
the setting of the delay between frozen image and live image (in frames). To permit
a reproduction of a given setting, the current setting is displayed as a bar together
with a percentage indication.
If a video with movement is selected as input signal, a stroboscope effect will result
if the Strobe mode is enabled.
Note:
If the video running through the store is used in a recursion to serve as input signal
and the current video is displaced with the trackball, this will result in a trailing effect.
Here the two channels should be operated in Couple mode, so that the correspond-
ing key signal is modified as well.
Please refer also to the Application Notes.
The Live and Freeze digipots permit the selection of a maximum of 15 frames
each.
The Strobe buttons freeze a full Frame, Field 1 only or Field 2 only.
For details refer to section Introduction.
Latch Mode
Latch
Strobe
Strobe / Freeze Input
Frame
Field1
Field2
Digits