Albalá Ingenieros AVD0001C01, Manual

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Albalá Ingenieros | Manual AVD0001C01
HDi. Cyan. This LED indicates that the detected format of the analog video
at the input is equivalent to 1.5Gbit/s SDI at either interlaced 1080i50 or
1080i59.94.
HDp. Blue. This LED indicates that the detected format of the analog video
at the input is equivalent to 1.5Gbit/s SDI at either progressive 720p50,
720p59.94, 1080p25 or 1080p29.97.
SD. Green. This LED indicates that the detected format of the analog video
at the input is equivalent to SD SDI at either 486i59.94 or 576i50.
OTHER Yellow. This LED lights up if the AVD0001C01 module cannot
recognize the format of the video at the input. In this case the DC restorer
must be deactivated since without knowledge of the line frequency this
circuit cannot function properly. The equalizer will function correctly as long
as the cable used is Belden 1694A, regardless of the video signal format
being distributed.
FAIL. Red. This LED lights up if there is no signal at the video input.
GAIN: Multi-turn potentiometer for adjustment of the video signal gain.
EQ.: Multi-turn potentiometer for adjustment of the video signal equalization.
In the INPUT box:
75 OHM,
HiZ: Switch that allows internal termination of the loop-through input with
75Ω.
In the DC RESTORER box:
ON,
OFF: Switch that activates or deactivates the DC restorer, setting the black level
to zero volts.
In the MODE box:
FAST,
SLOW: Switch that selects the operating mode of the DC restorer.
The signal presence indicator recognizes the format based upon the video
synchronization sequence. The AVD0001C01 does not recognize all standard video
formats, it is limited to those formats listed in the previous table. However if the OTHER
LED lights up the the distributor can function even though it is not indicating the specific
signal format.
4.2. Functional description
The AVD0001C01 is composed of three blocks: a DC restorer, an equalizer and the
output amplifiers that distribute the signal. The first two blocks are described in more
detail in the following.
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