360 Systems V2000 Series, Руководство по эксплуатации, Страница: 25 / 117

Hardware Interface
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Gigabit Ethernet Ports
Two Gigabit Ethernet ports (1000Base-T) are provided on the Image Server ( NET 3 , NET 4 ).
These are primarily intended for network transfer of program content between video servers or
network attached storage.
GPI Control
The Image Server provides six GPI inputs for control of machine functions, which appear on
the 25-pin
GPI connector. This General Purpose Interface can be connected to switch contacts
or an open-collector transistor output. GPI inputs are programmable, and can provide machine
control such as PLAY, STOP, or RECORD through simple external switches.
The Image Server also provides six GPI status outputs which may be used to confirm that a
command has been received, or for other purposes. These functions of these open-collector
outputs are programmable, and may be used to operate an LED, or they can be connected to a
suitable logic input. The pin-out for the GPI connector will be found in
Connector
Specifications .
Genlock Sync Reference
A BNC connector is provided on the rear panel to receive a genlock signal. During normal
operation, the Image Server should be referenced to an external genlock reference in the form
of CVBS Black. As with all video systems, this server and equipment connected to it must be
referenced to a common genlock source. The
GENLOCK input provides a fixed 75-ohm
termination.
An internal crystal reference is also provided so that the server can be used as a stand-alone
player, and also for convenience in performing tests in the laboratory. Use particular care
when operating the server with its internal reference, as synchronization with other equipment
is not possible. Additionally, recording is not allowed when using the internal crystal.
Genlock Signal Quality
A genlock signal connected to the Image Server must conform to the RS-170A standard. PLL
circuits used within the server remove residual jitter from the genlock signal. This may
preclude the use of low-cost VTRs that introduce time instability (wow) into their output,
making them inaccurate as a genlock input source.
LTC Time Code Input
A LTC time code input is provided on the LTC IN BNC connector. This input may be selected
by means of the On-Screen user interface and recorded as a time code reference. The LTC
input provides a >10k ohm termination.
LTC Time Code Output
An LTC time code output is provided on the
LTC OUT
BNC connector. It may be selected by
means of the On-Screen user interface to output time code from any of the three video
channels during playback. The LTC output has a low source impedance of <5 ohms.