Table of Contents
Advertisement
Contact/Tally Mode 2
Ports
Operations
1 through 4
•
Contact ports are controlled externally, using Show Me cables or other button switches.
When a specific contact port is shorted (closed), the DTP T SW4 HD 4K switches to the
•
associated video input.
•
Firmware controls the actions of the tally port.
The tally ports indicate the input currently selected using an LED connection, similar to the front
•
panel LED buttons.
•
When an input button is selected and the contact pin (C) is momentarily shorted, the tally
follows the associated contact port. The associated tally port latches closed, lighting the
button selected. All other tally ports latch open, causing their buttons to not light.
•
Channel and contact port status (open or closed ) for the input selected can be monitored via SIS
unsolicited responses.
5 and 6
•
Firmware controls the actions of the tally ports.
•
Only one tally port is latched closed at any given time.
•
For example, port 5 is wired to an On button. The On button includes an integrated switch and
LED. The contact pin of port 5 is connected to the switch. The tally pin of port 5 is connected to
the LED.
Port 6 is wired to an Off button. The contact pin 6 is connected to the switch. The tally pin 6 is
connected to the LED.
•
The tally ports light the On and Off buttons.
•
Only one of these buttons will light at any given time.
When the On button is pressed, the contact pin (C) is shorted, and the associated tally port
•
latches closed, lighting the On button. The tally port on the Off button latches open, causing
the Off button to turn off.
•
When the Off button is pressed, the contact pin (C) is shorted, and the associated tally port
latches closed, lighting the Off button. The tally port on the On button latches open, causing
the On button to turn off.
Contact port status (opened or closed) can be monitored by SIS unsolicited responses sent from
•
the switcher to the control processor via the RS-232 port.
DTP T SW4 HD 4K • Operation
19
Advertisement
Table of Contents
