CPP100
SECTION 6
CPP1OPS
25/10/06
www.snellwilcox.com
Version 1 Issue 6
6.29
V-Std
When a 525 serial digital component input is
selected it is possible to select three different
modes of operation.
Note: Lines 10-20/273-282 are collectively treated
as VITS lines and as such can be individually
blanked or passed. Although the following
description assumes that all VITS lines have been
selected to be passed through the unit, individual
VITS lines may be blanked or passed as required.
The following V-Std setting determines which of the
VITS lines may be filtered.
SMPT125M permits the optional use of lines 10-19
and 273-282 as video. This is reflected in the data
stream by changing the width of the embedded
vertical blanking period. If the optional lines are
used to carry video information then the vertical
blanking period is reduced as shown below:
OVD
Optional Video Data
Lines
1-9/264-272
Lines 1-9/264-272 are digitally blanked within the
unit and lines 10-19/273-282 are treated as video
and
will
be affected by any of the filters that are
active within the unit.
If the optional lines are
not
used to carry video
information then the vertical blanking period is
increased as shown below:
OBD
Optional Blanking Data
Lines 1-19/264-282
In this case, lines 1-19/264-283 will not be filtered
within the unit and any VITS or embedded
information will be passed.
In order to preserve closed caption information,
which may be transmitted on lines 20 to 22 an
additional setting has been provided which affects
these lines only:
ABD
Additional Blanking Data
Lines 1-22/264-285
ABD in 625 = Line (not on –G version)
This setting behaves in the same way as OBD with
the exception that lines 20 to 22 will
not
be filtered
by any of the filters within the unit.
The embedded vertical flag conforms to the
SMPTE125 OBD standard (lines 10-19/273-282).
Default OVD
Pattern
Selecting this option can enable the internal test
patterns.
The test pattern can be turned ON and OFF directly
from the front panel by pressing the PATTERN
button on the front panel.
Pat Select
The test pattern displayed can be selected in the
Pat Select
menu.
To go directly to this menu PRESS and HOLD the
PATTERN button on the front panel.
The available test patterns are:-
Black / EBU Bars / Y Ramp / UV Ramp /
Y Sweep / UV Sweep / Bowtie / Full Bars
Default EBU Bars
On Fail
When an input loss occurs it is possible to configure
the PREFIX to operate in a predetermined mode
dependent on which input is selected.
Composite Input Selected
SDI B / Video(Freeze on –G version) /
Message / Black / EBU
Bars / Y Ramp / UV Ramp / Y Sweep /
UV Sweep / Bowtie / Full Bars(not on –G
version)
Default Message
SDI Input Selected
SDI B / Freeze / Message / Black / EBU
Bars / Y Ramp / UV Ramp / Y Sweep /
UV Sweep / Bowtie / Full Bars(not on –G
version)
Default Message
As soon as a valid input is detected the On Fail
condition is released and the source is passed
through the unit again.
