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SDI-FMC User Manual
34
April 22, 2019
used to adjust the video standard. When
BUTTON2
is pressed, SD SDI video standard is used.
When
BUTTON2
is released, 12G SDI video standard is used.
Figure 4-4 Block Diagram of 12G/3G SDI Loopback Test
The
TWO_CH_3G_DU
block contains two channels of 3G pattern generator and checker to
perform a 3G SDI loopback test. Only one direction 3G SDI loopback is performed because the 3G
SDI chip is a bi-direction chip. The
SWICH0
is used to switch the direction. Each pattern generator
and checker is created based on Quartus SDI II IP. The LED2 and LED3 are used by pattern
checker to report whether they receive a valid SDI pattern. The TRS and Aligns pins of the SDI II
controller are used to check whether a valid SDI pattern is received. When LED is lit, it means a
valid pattern is received. The block requires a 148.5 MHz reference clock for the pattern generator
and a 270 MHz reference clock for the pattern checker. Both of the clocks are coming from the