NUTMEG VIDEO INPUT/MONITOR CARD
An essential card for NUTMEGs used in media systems with multiple video sources. The card accepts up to eight composite video signals (NTSC, PAL, SECAM). These signals may come from any video source: laserdisc, video tape, rooftop telescope, etc. The signals are buffered and placed on the NUTMEG's video bus for selection by video projector output/control cards in the same NUTMEG chassis. This allows each projector controlled by the NUTMEG to have random access to any of eight video sources. (If you need more than eight sources a second card may be multiplexed—yielding a total of fifteen sources—by special order.)
A separate Monitor output allows monitoring of any of the eight video inputs. Normally this is done using a small video monitor mounted in the rack next to the NUTMEG. Source selection for the Monitor Output is normally done by means of the front panel pushbutton; however, this may be controlled directly by SPICE Automation for special applications.
SPECIFICATIONS
INPUT/OUTPUT CONNECTIONS
VIDEO IN (1-8) - Single composite video input via BNC connector. DC coupled with 75 Ohm termination impedance.
MONITOR OUTPUT - Single composite video output via BNC connector. Outputs one of the inputs, selected by the front pushbutton. Capable of driving a 75 Ohm cable over 100 ft.
PANEL CONTROLS
MONITOR SOURCE SELECT - Selects input connected to MONITOR OUTPUT.
PANEL DISPLAYS
MONITOR SOURCE - A seven segment display showing source selected.
GENERAL CAPABILITIES
Buffers eight composite video sources and routes them to the NUTMEG internal video bus from which the output cards select sources. An eight channel multiplexer selects one of these sources for viewing via MONITOR OUTPUT. This multiplexer can be automated by a special configuration.
DEVICES CURRENTLY SUPPORTED
PAL, NTSC, SECAM composite video input
MAXIMUM CABLE RUNS
Unlike digital communications, video signals do not suddenly fail after a certain distance. Rather, as distance increases, the picture degrades in
sharpness and color fidelity. If cable runs exceed 100 ft, we recommend that tests be made to determine if the picture quality is acceptable; use buffer amps if it is not. Always use low loss, high quality 75 Ohm coaxial cable with reliable connectors for all video connections.
POWER REQUIREMENTS
Card draws necessary power directly from the NUTMEG
Card requires one open option-card slot in a NUTMEG
SS 276-105 NUTMEG Video Input/Monitor Card