Page
SD1012 Installation Manual - Issue 6, Rev 1
S&W Production & Post Production
18
CONTROL PORTS AND PROTOCOLS -
continued
Using a Sony BVE-9100 editor
There is a fairly common problem when using the BVE-9100 editor and S & W switchers whereby
the switcher appears to be acting slightly too late on commands coming from the editor (or, that the
editor is sending commands slightly too late for the switcher).
The problem is easily overcome by a setting on the editor.
If, when running the SD1008 switcher from a Sony BVE-9100 editor, the edit timing appears to be
inaccurate, please follow this procedure.
Determine how many fields late (if any) the switcher is switching is as follows.
1. Using the editor perform a one-second Key Cut On transition with a Key Delay of one frame.
(This forces the editor to actually cut the key on "live" during the edit interval rather than
during the preroll.)
2. Examine the start of the edit field-by-field. You should get two fields (one frame) of the new
source without the key, then the key should appear on the third field of the edit interval.
Obviously this assumes that the recorder is correctly timed. However if you use a tape with burnt-in
timecode you should be able to prove the switcher timing regardless of the recorder's timing (and
you should also be able to check the recorder's timing too).
The most common problem (when running Sony BVS/DVS protocol with HD) is that the switcher is
acting one field too late, i.e. there are 3 clear fields of new material before the key is cut on over the
top of it.
To fix this, the BVE-9100 editor's switcher command transmit timing needs to be adjusted. This
adjusts how much in advance the BVE-9100 sends commands to the switcher.
DATA-5 in the IDC Serial Switcher Interface screen (known as "TRANSMIT INTERVAL OFFSET")
does this. Despite the fact that it's about the only item on that screen that doesn't say "[BY
QUARTER FIELD]", it IS in quarter-field steps. So, for example, to compensate for a one FRAME
(two fields) flash you need to set it to 08.
Summary of Contents for SD1012
Page 1: ...INSTALLATION MANUAL SD1012...
