Model 5600MSC Master Clock/SPG Manual
TECHNICAL DESCRIPTIONOPERATION
Revision 1.6
Page
3-47
3.6.8.1. Clean Aperture with Graticule
This signal contains a number of key physical dimensions of the HDTV active picture area. It divides
the 16x9 aspect ratio clean aperture area into an 8x6 graticule grid. The center 6x6 grid corresponds to
a 4x3 aspect ratio rectangle that is concentric with the 16x9 clean aperture. The edges of the 4x3 area
have different line patterns to help in identifying it. The clean aperture markers are placed so that the
center of the lines is at the clean aperture. The production aperture markers are placed so that the
outsides of the lines are at the production aperture (the extent of the total image). A center cross
marker is also included to mark the middle of the image.
3.6.8.2. Production
Aperture
Single horizontal lines and single pixel vertical borders around the active picture mark the production
aperture. Single pixels and single horizontal lines are not legal for normal pictures but this test signal is
designed to test equipment to make sure it is processing/passing the whole image area. If any side of
the box is missing, then the device under test is not passing the whole production aperture.
3.6.8.3. The Grey Signals
These signals can be used as a 50% full field grey, and they are also designed to provide a best case
and a worse case toggle rate on the test signal data bits. The regular
Grey
signal has both the
luminance and the chrominance values set to 200hex, while the
Grey with all data bits active
signal has
both the luminance and the chrominance bits alternating between 200hex and 1FFhex. The latter signal
has every data bit toggling every video sample.
Most current digital logic designs use CMOS technology where the power consumed and the heat
produced are proportional to the average toggle rate of all of the flip flops in the product. If a product
performs a large amount of video processing (in proportion to all processing), and then there will be a
power consumption difference between a “quiet” signal and a “very active” signal. The grey signals can
be used as a best case and a worst case condition for checking such conditions.
3.6.9. Configuring the Output Global Phasing
The
Global Phasing
menu allows you to add a phase offset to the Sync 1 to 6, Analog and SDI Test
generator, DARS and AES outputs. The
Global Phasing
menu items do not affect the HD Test
generator output.
3.6.9.1. Enabling the Global Phase Offset
OUTPUT
GLOBAL PHASING
Global Phase En
Global phase off
Global phase on
This menu item sets whether the global phase offset will be applied to the
Sync 1 to 6, Analog and SDI Test generator, DARS and AES outputs.
USO
RESTRITO
