Miranda FRS-111i, Руководство по установке и эксплуатации

Страница: 6 / 21

2
1.2 Features
•
Serial digital 4:2:2 input with active loop-through output (270 Mbps)
•
Reference input with passive loop-through output
•
Automatic 525/625 input format detection
•
EDH monitoring and insertion
•
4 serial digital 4:2:2 outputs
•
Adjustable timing of video signal (2 frames max., H & V adjustment)
•
Selectable HANC (pass or blank )
•
Selectable VANC blanking on a line-by-line basis (pass / blank) line 10 ~ 24 for
format 525 and line 6 ~ 24 for format 625.
•
Built-in test pattern generator for 75% and 100% color bars, and black.
•
Control signal for future bypass relay on rear module.
•
Frame and field freeze capabilities (field1/ field2/ frame selection/black)
•
Automatic freeze to last good field or black on error or on loss of input.
•
Detection of frozen video on incoming signal.
•
GPI output that indicates input video error, signal loss (this output will follow the
automatic freeze state), or input freeze detection.
•
Tracking delay signal to control the audio delay module
•
Reference may be NTSC or PAL
1.3 Typical Applications
1.3.1 Hot Switching
Some applications or studio setups may require that the input 4:2:2 signal to the
FRS-111i be switched between two or more synchronous sources. Since these
synchronous sources are generally not in phase with respect to each other,
unpleasant visual effects may occur when switching from source A to a
different time position in source B. Also, some “break before make” switchers will
further deteriorate the 4:2:2 signal by producing a hit on the video signal.
Figure 1.1 illustrates a typical hot switch setup. For a smooth transfer to occur when
switching between two sources, set the FRZE-MODE to ERR (error on input signal).
Immediately after a switch is performed on the routing switcher, FRS-111i will detect
an input error thereby performing a freeze. The FRS-111i automatically switches to
the last errorless field or black. Once the transfer between the two sources is
complete and after two full errorless input frames, the freeze is removed and normal
mode is resumed.
Note: Operation is guaranteed if the time delay between the two sources is less
than 10 video lines.
Figure 1.1 Typical Hot Switch Installation
Routing
switcher
Reference
FRS-111i
Source A
Source B