Ensemble Designs BrightEye NXT 410 Clean HDMI Router - Manual (Page 59)

www.ensembledesigns.com Page 59
BrightEye NXT 410/415/430 Compact Router Installation, Configuration and Operations Guide
Vertical and Horizontal Timing
The Vertical and Horizontal Timing controls adjust the timing of the TSG relative to the genlock
reference. Setting the H and V parameters to 0 will “zero” time the TSG to the reference. Negative
values will cause the TSG to be early with respect to the reference; positive values will make the TSG
later in time.
When the Router is being operated from an external 10 MHz reference, or when it is configured to use
its internal precision frequency reference, there is no external video reference against which H and V
timing can be adjusted. In that case, all of the resources in the router (the TSGs and the Clean Switch/
Synchronizers) will be adjusted against a common, internally generated video timing reference. This
means that they can be adjusted relative to each other. If all of their H and V Timing parameters are
set to identical values (like 0), they will all be locked (synchronous) to each other and they will all be in
vertical and horizontal alignment with each other.
Note: The timing adjustments for the Primary Test Signal Generator are also used to
position the vertical interval switching point in the Router’s matrix. The timing of the
Primary TSG can be compared to other sources on a Waveform Monitor to ensure
that the switch point will be properly aligned to the sources feeding the Router.
Audio Embedding
Each TSG has an Audio Embedder (Multiplexer) that can embed 16 channels of audio into the TSG SDI
output. Audio is embedded in groups, each of which contains 4 channels. There are 9 audio sources for
each channel – 8 tone generators, plus silence.
Note: In the world of digital audio, there is a big difference between “Silence” and “no
signal present.” In the same way that Black is a legitimate video signal, digital silence
must be sent to destinations rather than just sending “nothing.” Thus, TSGs should
generally be configured to embed ALL of the groups that may be in use in a facility,
with Silence chosen as the audio signal for channels where no content is needed
or desired. Otherwise, switching between a TSG with only one group enabled, and
a source with two groups of embedded audio present, will produce undesirable
effects in downstream equipment.