Cobalt Digital COMPASS 9363 Multi-Format Reference Generator - Manual (Page 8)

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9363 Functional Description
1-4 9363 PRODUCT MANUAL 9363-OM (V1.2)
9363 Functional Description
Figure 1-1 shows a functional block diagram of the 9363. In addition to
providing four reference output signal pairs, the 9363 also provides a
synchronized AES/word clock output.
The 9363 can select from external references from openGear™ frame
reference distributed signals
Ref 1 or Ref 2 , or Ext Ref ( Local ) which is
received via a rear module BNC connector.
The 9363 is compatible with the input formats and rates (including AES and
basic word clock signals), and provides multiple output formats and rates as
listed in Table 1-1. Using the card’s internal generator source, the 9363 can
also generate reference outputs without using any external reference.
Available Output Formats/Rates
Table 1-1 lists the available output formats/rates for input references
supported by the 9363. Note in Table 1-1 that when converting between
formats and rates, various lock states exist for different conversions (for
example, when going from a progressive-format reference to an interlaced
format output, the card cannot provide an output that is assured always to
indicate an odd or even field). Described below are the three types of lock
states provided for various conversions provided by the card.
Four pairs of outputs are provided, with each pair OUT 1A / OUT 1B thru
OUT 4A / OUT 4B being independently configurable as black burst or tri-level
reference outputs. Each of the outputs can be independently configured for
any rate/format related to the source reference format, and can additionally be
independently delayed or advanced (in terms of vertical lines or horizontal
pixels) relative to the source timing. If the card internal reference clock source
is used, the four output pairs operate as described above, with the internal
source instead serving as the timing basis.
Genlock
Source
Output
Output is synchronized with source
reference in both frame and field (where
applicable)
Field Lock
When an interlaced format is derived from a
progressive source, field lock is achieved.
However, timing does not reliably mark odd or
even field.
Clock Lock
Indicates a fixed relationship between the
source reference and output clock rates only;
but no relationship between source reference
and frame timing can be inferred.