360 Systems 1200HD-EX - Manual (Page 27)

Page 26 MAXX-1200 Owner’s Manual
or if a different source sample rate is present, the server’s input sample rate converter must be
selected.
Encoded audio streams such as Dolby E® must be referenced to the incoming video signal, and
the input sample rate converters must be disabled during recording.
Serial Control Ports
Each of the server’s three 9-pin serial inputs can control any of the three video channels. They
accept commands in VDCP, BVW or Odetics protocol. The separate serial ports allow
simultaneous connection by an automation controller and a desktop controller. See the
chapter on Automation Control for further details.
Most broadcast automation systems and some remote control panels employ VDCP protocol.
A list of supported VDCP commands will be found in Appendix B.
Many controllers used for transport, slow-mo, instant replay, and edit control employ BVW or
Odetics protocol. Note that MAXX-HD is not compatible with most edit controllers. Edit
controllers require features in the protocol specific to tape machines that are not supported.
Gigabit Ethernet Port
A Gigabit Ethernet port is provided on the server. It is intended for file transfer of program
content between video servers, NLEs, broadband networks, or network attached storage.
GPI Control
Six GPI inputs appear on the 26-pin GPI connector, and are intended for control of server
functions. These “General Purpose Inputs” can be connected to switch contacts or an open-
collector transistor output. The GPI inputs are programmable, for control such as PLAY, STOP,
or RECORD through simple external switches.
The server also provides six GPI outputs which may be used to confirm that a command has
been received (such as operating an LED), or to initiate an external event, such as an effect
within a switcher. The functions of these open-collector outputs are programmable. The pin-
out for the GPI connector will be found in Connector Specifications.
Genlock Sync Reference
A BNC connector is provided to receive a genlock signal. During normal operation, the server
should be referenced to an external genlock (sync) reference (SMPTE 170M or ITU-R-BT.470).
As with all video systems, this server and equipment connected to it must be referenced to a
common genlock source. The GENLOCK input has a 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 an internal reference, as synchronization with other equipment
may not be possible.