OmniTek Ultra XR, Руководство пользователя

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2–34 XR-56-201 5 Viewer 03/18
Viewer
Format Information
A Format entry is given at the top of each status page. On pages relating to Inputs, it gives the standard
to which the individual input is locked - automatically determined by the Ultra e.g. from SMPTE 352
packets within the video stream. For pages such as the Video and Physical pages, it gives the video
standard of the signal produced by combining the various different inputs.
Error Checking Information
The entries in this section show
parameters in error and give error counts
for a range of standard features of the
video data stream. For instance, the ANC
entry counts invalid ANC checksums.
When an error is detected, pressing on
the red button next to the error will move
the cursor to that position in the Data
Viewer
FVH Field Vertical Horizontal timing reference. This will display incorrectly timed,
missing or damaged FVH words.
TRS Timing Reference Signal. A TRS word appears at the start of each video line and
this will display missing or damaged TRS words.
TRS Position The position of the TRS word will be checked by the system and if any are in the
wrong position it will be displayed here.
CRC The system calculates new 16-bit CCITT CRC (Cyclic Redundancy Check) values
from the incoming data for each video line, and compares these values with the
actual CRC values embedded in the data. If there is a difference, this is flagged
as an error. The CRC values that have been calculated for the active area and
for each full field/frame are also displayed. This data may be used to assess the
degree to which video data has been degraded by the path over which it has
been transmitted.
ANC The system calculates a new 16-bit CCITT CRC (Cyclic Redundancy Check) values
from the ancillary data, and compares this value with the actual CRC value
embedded in the data. If there is a difference, this is flagged as an error.
Line The Line entry counts TRS packets where the line number specified does
not agree with the line number calculated internally. Note: This entry is only
applicable to HD and 3G video: Line numbers are not included in TRS packets in
SD.
Active F1 CRC This displays the checksum for the Active Picture cyclic redundancy check for
field 1 of image.
Active F2 CRC This displays the checksum for the Active Picture cyclic redundancy check for
field 2 of image.
Full F1 CRC This displays the checksum for the cyclic redundancy check for the complete
data frame of field 1.
Full F2 CRC This displays the checksum for the cyclic redundancy check for the complete
data frame of field 2.