8-2 IRIS OWNER’S GUIDE
SERIES 3000 Version 1.0
Video Options
8.1 Supported Options
8.1.1 60 Hz Non-interlaced Monitor
The 60 Hz non-interlaced high-resolution monitor has a visible resolution of
1024 pixels by 768 lines. These monitors are available in two sizes: fifteen-inch
and nineteen-inch. For more information on these monitors, see Chapter 2.
8.1.2 33 Hz Interlaced Monitor
The 33 Hz interlaced high-resolution monitor has a visible resolution of 1024
pixels by 768 lines. For more information, see Chapter 2.
8.1.3 RS-170A
The RS-170A option has a visible resolution of 636 pixels by 485 lines and a
frame rate of 30 Hz.
The IRIS workstation provides red, green, blue, and sync video outputs
(RGBS). The RGB outputs from the IRIS are noncomposite 0.7 V p-p into 75
ohms, positive bright. The sync output is TTL, low active, and is capable of
driving a 75-ohm load. It meets RS-170A timing with one exception: the
oscillator that determines horizontal scanning frequency stability in the IRIS
differs from the frequency stability of the RS-170A color television timing
standard (± 0.005% versus ± 0.000279%). This stability is adequate tor most
applications but not for broadcasting. For broadcast applications, use either
the genlockable RS-170A option or a timebase corrector.
The IRIS RGBS output can be encoded into an NTSC signal with a stand-alone
NTSC color encoder or an NTSC color encoder connected to a sync generator
genlocked to the IRIS sync output. This NTSC signal can be connected to video
tape recorders or an NTSC-type monitor.
8.1.4 European Video Standard
The European video standard has a visible resolution of 780 pixels by 575 lines,
a frame rate of 25 Hz, and a total vertical resolution of 625 lines.
The IRIS workstation provides red, green, blue, and sync video outputs
(RGBS). The RGB outputs from the IRIS are noncomposite 0.7 V p-p into 75
ohms, positive bright. The sync output is TTL, low active, and is capable of
driving a 75-ohm load. It meets European low-resolution video timing, with
one exception: the oscillator that determines horizontal scanning frequency
stability in the IRIS differs from the frequency stability of the European color
television timing standards (± 0.005% versus ± 0.0001 %). This stability option
is adequate for most applications but not for broadcasting. For broadcast
applications, use the genlockable European low-resolution video or a timebase
corrector.
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General