Matrox Solios eA, Установка и справочник по оборудованию, Страница: 78 / 196

78 Chapter 4: Matrox Solios hardware reference
PSGs
Matrox Solios eA/XA Quad features four programmable synchronization
generators (PSGs), Matrox Solios eA/XA Dual features two, whereas Matrox Solios
eA/XA Single features one. The PSGs are responsible for managing all input and
output video timing, synchronization, trigger, exposure, and user-defined signals.
The PSGs on Matrox Solios eA/XA allow the board to adapt to many video
standards. Each PSG allows for independent acquisition from a video source.
Therefore, Matrox Solios eA/XA allows acquisition from up to four independent
video sources, depending on the board.
The phase-locked loop
The high-performance, low-jitter phase-locked loop (PLL) uses frequency
synthesis techniques to generate the clock signal in slave mode.
As a reference, the PLL uses the composite or horizontal video synchronization
signal supplied by the video source (line-locked mode).
Since the signal from the video source is used as a reference, the PLL can produce
a clock signal that is a multiple of it. If the video source supplies a clock signal
within the input range of the A/D converters, the PLL is bypassed to avoid adding
jitter to the supplied clock.
Synchronization, timing, and control signals
The following tables summarize the synchronization, timing, and control signals
supported by Matrox Solios eA/XA. Most of these signals are available by defining
an auxiliary (multi-purpose) signal as the required synchronization, timing, or
control signal in the DCF. For example, P0_TTL_AUX(TRIG)_IN can be
defined for acquisition path 0 as trigger input signal 0, field polarity input signal 0,
or user-defined input signal 0.
Only the auxiliary signals of the first acquisition path used by a video source are
available (for example, if grabbing RGB and monochrome, only the auxiliary
signals for path 0 and path 3 are available).
Specification
Operating frequency range 12 to 80 MHz
Jitter 4.6 nsec p-p absolute with RS-170 synchronization source