Grass Valley LDK 4410 - Manual (Page 19)

LDK 4410 + LDK 5420 3G Fiber Transmission System User’s Guide (v1.0) 19
Chapter 2 - Base station
If a contact is closed, the corresponding function is Active or Inactive, depending on the
selection the
SYSTEM > SIGNALLING menu:
Voltage level
Apply a DC voltage to the inputs (respect polarity). If the voltage is low (0 to 2.5 V), 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 the
SYSTEM > SIGNALLING menu:
Menu setting Input is shorted: Input is open:
LH (low-high) Function is Active Function is Inactive
HL (high-low) Function is Inactive Function is Active
Menu setting Input is 0 to 2.5V: Input is 4 to 24V:
LH (low-high) Function is Active Function is Inactive
HL (high-low) Function is Inactive Function is Active
ISO 1a
0 .. 2.5 VDC
4 .. 24 VDC
0 .. 2.5 VDC
4 .. 24 VDC
0 .. 2.5 VDC
4 .. 24 VDC
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)
+
-
+
-
+
-