Sony DVS-9000 System User Manual page 290

Note
When using the record function to continuously capture frames, it is not
possible to use the mask function.
Continuously freezing input images and writing to memory
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Still Image Operations
In the Frame Memory menu, select VF1 'Still' and HF4 'Animation
Record.'
The Animation Record menu appears.
Select the desired frame memory.
For details of the operating procedures, see "Selecting outputs (FM) and
target frame memory" (page 276).
To use V/K mode, press [V/K Mode], turning it on.
Press a button in the frame memory folder selection area, to select the
folder to hold the freeze image.
For details of the selection method, see page 277.
Note
The folder selected here is the destination folder for writing the freeze
image.
It is not possible to change the selection of this folder after the following
step 5.
An orange bar appears on the selection button for the destination folder.
Press [Record Enable], turning it on.
The signals of frame memory source buses 1 and 2 are assigned to the pair
of FMs selected in step 2, the recording function is now possible.
Input the file name if required.
Pressing [File Name] displays the keyboard window and you can enter the
first character string (up to four characters) of the file name.
Set the recording time if required.
Pressing [Duration] displays the numeric keypad window, in which you
can enter the recording time in the form of timecode.
If you set the recording time to zero, this uses all frame memory in which
storing is possible for recording.