TBS100/100D
SECTION 4
TBS100OPS
20/10/06
www.snellwilcox.com
Version 2 Issue 5
4.20
Standards
Input Standards
The decoder employs an auto standard detection
system. It will auto detect any of the composite or
Y/C standards that are checked in the list of Input
Standards.
In the example above it will auto detect all
standards except NTSC. Any number (one or
more) of standards may be selected. For example,
in a given situation where it is known that only PAL
and NTSC input signals are expected, only the
PAL and NTSC standards should be checked.
The decoder will then only auto detect between
PAL and NTSC standards. Other standards will not
be decoded and will produce an unstable lock.
To force the unit to decode only one standard,
check that standard and uncheck all others.
PAL Chroma 2 Line Averager
When selected this will provide PAL Hanover bar
suppression.
Notes Concerning Input Standard Selection
At least one standard must be selected; if an
attempt is made to uncheck all items the last
standard selected will remain checked and
become the only standard to be decoded.
For NTSC signals either NTSC
or
NTSCJ may be
checked, but it is not possible to check both NTSC
and
NTSCJ.
The output
line
standard will be the same as the
detected input standard. i.e. the output signal will
be at a line rate of 625 if the detected input signal
has a line rate of 625; similarly the output signal
will be at a line rate of 525 if the detected input
signal has a line rate of 525.
NTSCJ
When this function is enabled the decoder will
correctly process a NTSCJ signal (an NTSC signal
without pedestal)
Output Standard
The output line standard will always be the same
as the detected input line standard. These items
allow the encoded formats for the different line
standards to be selected.
625 Output Standards
This item allows the encoded formats for 625 line
standards to be selected.
525 Output Standards
This item allows the encoded formats for 525 line
standards to be selected.
When the NTSCJ is enabled the encoder will
produce an NTSCJ signal (an NTSC signal without
pedestal)
Default Output
If the input signal fails this function allows the
output to be configured to become one of the
following:
Input
The output will be the unprocessed
input signal.
Pattern
The output will become the test
pattern as selected from the
Control/Pattern menu.
Freeze
The output will become a frozen
picture of the last frame.
Stable Input When the Freeze function is chosen
the quality of the frozen picture will
depend on the stability of the input
signal.
If the input signal is known to be
from a stable source this box should
be checked as this will give the best
quality frozen picture. If the input
signal is not from a stable source
this box should be unchecked.
