User Test Patterns and Images
Users can add test images to the Qx. These user test files must be in the Tagged Image File Format (TIFF)
and of the exact pixel resolution of the video standard of intended use. The specifications for Qx user test
files are detailed below:
Format Type Extension Pixel Resolutions Bit Depth Pixel Order
TIFF Native
(Files converted to TIFF from
other formats are not supported)
.tif 1280x720,
1920x1080,
2048x1080,
3840x2160,
4096x2160
16 Interleaved
User test files can be added to the Qx via SFTP. See ‘Remote Connection’ section of this manual for details
on how to connect via SFTP to the Qx.
Via SFTP, user test files should added to the 'transfer/userTestPatterns' directory of the Qx. After adding
these files, restart the Qx. User test images will then be available in the 'Generate - Video' tab of 'Generator -
Configuration' alongside all other test patterns.
Pathological signal insertion
Pathological Signal Insertion is a powerful feature.
In addition to selecting a background test pattern, a pathological pattern may be added as an overlay.
l Pathological insertion > Insertion > [Enabled, Disabled]
Three types of pattern are supported:
l Pathological insertion > Pattern to overlay > [Eq, PLL, CheckField]
The amount of pathological pattern may be configured to enable the user to verify how sensitive the SDI link
is to pathological conditions on the interface:
l Pathological insertion > Pairs to insert > [0 to 16384]
This control limits at the selected format’s line length.
Note: Pathological signals are approved by SMPTE for use with HD and 3G Level A standards only. For
3G Level B, 6G and 12G-SDI interface formats, pathological signals can still be used, but are not approved
by SMPTE (as of February 2017). It is believed that inserting a full line of pathological signal in these non-
approved standards is too stressful a test for the SDI interface. No physical damage will occur, but the
interface may exhibit reduced operating performance in the form of bit errors.
Output offset adjustment [SDI Modes]
A signal can be generated with a fixed offset, relative to the system reference.
Offsets can be entered in temporal or spatial terms:
l Output offset adjustment > Offset Type > [Time, Lines And Pixels
Selecting ‘Time’ reveals a drop-down field where the timing offset can be set in microseconds:
l Output offset adjustment > Offset Type > Time > Output Time Offset > [0.00, +/- 0.01, etc...]
Selecting ‘Lines And Pixels’ reveals drop-down fields where the offset can be set in coordinate terms:
l Output offset adjustment > Offset Type > Lines And Pixels > Output Line Offset > [0 to +/- (Total no.
of Lines for current standard -1)]
l Output offset adjustment > Offset Type > Lines And Pixels > Pixel Offset > [0 to +/- (Total no. of Pixels
per Line for current standard -1)]
Page 16 PHABRIX Qx User Manual
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