GRASS VALLEY XCU UXF Fiber Series - Open Circuit;Voltage Level

XCU UXF Fiber Series XF Transmission Fiber Base Station User’s Guide (v1.3) 23
Chapter 2 - Installation
2.5.5 Open circuit/Voltage level
Leave the circuit open or apply a DC voltage to the inputs (respect polarity). If the circuit is
open, the function is Active (or Inactive). If the voltage is high (4 to 24 V) the function is Inactive
(or Active). 
The function state depends on the selection in the INSTALL > SIGNALLING INPUT menu:
Menu setting Input is open: Input is 4 to 24V:
OH (open-high) Function is Active Function is Inactive
HO (high-open) Function is Inactive Function is Active
ISO 1a
Open/
4..24 V
DC
Open/
4..24 V
DC
Open/
4..24 V
DC
ISO 1b
On-Air (Tally) 1a
On-Air (Tally) 1b
Call 1a
Call 1b
ISO in ext. send (pin 3)
ISO in ext. return (pin 11)
On-Air in ext. send (pin 4)
On-Air in ext. return (pin 12)
Call in ext. send (pin 5)
Call in ext. return (pin 13)