User`s manual

Shasta 1616D
9
Sync Input
There are two BNC connectors labeled "SYNC". This is a "looping" input for sync
referencing. Connect either composite sync or video with sync to either BNC. If desired,
use the second BNC to loop the signal to another device. If the loop is not used,
terminate the second BNC with 75 ohms. If no sync is available, the routing switcher will
switch at a random point rather than during the vertical interval of the reference signal.
AC Power Connections
The Shasta 1616D uses an external 22VAC, 40VA (part number PW11003-00) supply.
Turn on power to the frame ONLY AFTER all video and control connections have been
completed as described.
Local Control Panel
The front cover of the 1616D may be either a blank door or an optional XY control panel.
If the optional control panel is ordered (part number 804548), it will be installed at the
factory. To install a local control panel later, remove the door and replace it with the
control panel. The control panel connects to the 1616D electronics by means of a 3- pin
cable which mates with the header (connectors) located on the module.
Remote Control Panels
On the rear panel of the Shasta 1616D there is a 9 pin mini-XLR connector. The mini-
XLR connection utilizes RS-485 serial control.
The remote control panels have two mini-XLR connectors wired in parallel. The dual
connectors allow multiple panels connected to the same router to be looped from one
panel to the next.
The Shasta Series control system is based on our proven "three port" system. One of
these ports is dedicated to the RS485 based control panel system (mini-XLR connector).
A network of up to 64 Sierra Video Systems control panels can be linked via shielded
twisted-pair audio or data cable. Power to operate the remote control panels panel comes
from an external (wall wart) power supply.
A variety of control panel types are available, including XY and single bus panels. The
maximum system cable length is 5,000 feet (1,524 m) when operated at 31.25K baud.