IRIS 3010, Руководство пользователя

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Version 1.0 SERIES 3000
IRIS OWNER’S GUIDE 8-3 Video Options
The IRIS RGBS output can be encoded into a PAL signal by a stand-alone PAL
color encoder or a PAL color encoder connected to a sync generator genlocked
to the IRIS sync output. This PAL signal can be connected to a video tape
recorder or a PAL-type monitor.
8.1.5 Genlockable RS-170A or European Video Standard
The genlockable RS-170A or European video option synchronizes the IRIS RGB
outputs with those of an external sync master.
The IRIS RGBS output can be encoded into an NTSC or PAL signal with a
stand-alone color encoder or a PAL color encoder connected to a genlockable
sync generator which is also genlocked to the sync master.
The genlockable RS-170A or European video option provides operation with
commercially available video tape recorders and mixing/keying equipment
(when color encoded with external equipment). If a genlockable video option
is ordered, two BNC connectors are provided with the IRIS workstation
system. These connectors are located on the auxiliary I/O panel and are labeled
Genlock Input
(see Figure 7-1). If the IRIS is not used in a daisy chain, a 75-
ohm terminator is required on one of the two BNC connectors.
Operation of the genlockable RS-170A or genlockable European Video Standard
options are identical. The IRIS must be operating in its supported low-
resolution mode (RS-170A or European Video Standard) to genlock. Genlock
provides for vertical and horizontal alignment of the IRIS RGB and Sync
outputs to an external composite sync reference input presented to the
Genlock Input
on the auxiliary I/O panel (see Figure 7-1). This input is a loop-
through connection requiring external 75-ohm termination.
The genlocking process takes approximately two seconds. When a genlock
reference input is connected, the genlocking process is initiated automatically.
If no composite sync reference input is connected, the appropriate output (RS-
170A or European Video Standard) runs referenced to an internal timing
source. Genlocking takes place whenever the IRIS is reset, the genlock
reference input is disconnected and reconnected, or an “out-of-lock” condition
is detected. An “out-of-lock” condition typically results from a discontinuity
on the genlock reference input, such as a power interruption or a source
switch.
When genlocked, the IRIS output may be adjusted horizontally to compensate
for external equipment delays. To do this, use the horizontal phase adjust
potentiometer, labeled
HPhase Adjust
, which is reached through an access hole
on the auxiliary I/O panel (see Figure 7-1). This potentiometer provides an
adjustment range of ± 1.5 microseconds on the IRIS RGBS output with respect
to the genlock reference input.