27
THE VIDEO FORMAT FOR NDI OUTPUTS IS HANDLED AUTOMATICALLY. NDI MERELY
REQUIRES A NETWORK CONNECTION TO COMMUNICATE WITH NDI-ENABLED SYSTEMS
ON THE SAME NETWORK.
3. Connect external audio devices to the connectors in the
AUDIO OUT
section.
Section 6.4 Tally Lights
Tally Light support allows you to connect external tally lights and similar devices. These typically
provide a red LED for the video input that is currently selected on the Switcher’s Program row.
(NDI outputs also natively support tally over the network, without a separate connection.)
6.4.1 Connection Details
Here is a pin-out listing for the HD15 Tally connector:
•
Pin1 – LED1
•
Pin2 – LED2
•
Pin3 – LED3
•
Pin4 – LED4
•
Pin5 – unused
•
Pin6 – unused
•
Pin7 – unused
•
Pin8 – unused
•
Pin9 – GND
•
Pin10 – GND
•
Pin11 – unused
•
Pin12 – unused
•
Pin13 – unused
•
Pin14 – 3.3V (20 Ohms current limit)
•
Pin15 – unused
Engineering Notes
Pins 1-4 are ‘hot’ when the LED should be illuminated.
Each LED pin (1 – 4) has a 200 ohm current limiting resistor inside AV-HLC100.
With no load (open circuit) the LED pins can reach 5V. With a typical LED load, they can be expected
to reach about 3V.
To prevent damage to internal components when making connections to the tally light jacks, care
should be taken that connection to Pins designated GND (Ground) are always at ground potential.
FIGURE 11
