The return SDI inputs allow you to connect up to three return feeds from your switcher. These
feeds will be fed to your camera so that they can be viewed by the camera operator, or fed out
via SDI to other equipment.
Reference Input and Output
You can lock other video equipment to the program output of your ATEM switcher, or a common
external reference signal using the reference input and output.
For example, if you want to lock equipment to the reference signal embedded in an ATEM
switcher’s program return feed, plug the reference BNC output from the studio unit to your SDI
equipment.
Use the 'ref in' connection to send traditional reference timing
from other broadcast equipment to your camera
If you are not using an ATEM switcher and need to lock equipment to a common external
reference signal, plug the externally generated signal into the reference BNC input. This sends
the reference to the camera unit via the SMPTE fiber cable. The reference BNC output from the
studio unit can be used to loop the reference source to other equipment.
NOTE
If you connect Ultra HD to the return inputs, the Ultra HD video will be down
converted to 1080p at the same frame rate, so the output from the camera unit will be
HD. Down converting the Ultra HD return signals to HD allows for greater bandwidth so
you can send multiple return sources.
RETURN IN
1
2
3
OUT
OUT
IN
1
2
3
4
AC IN
PTZ
AUDIO ANALOG OUT
INTERCOM / TALLY
ETHERNET
12G DIGITAL I/O
OPTICAL I/O
REF
TIP
If you have multiple devices that need to be locked to the reference output, then
you can use a distribution amplifier, such as a Blackmagic Mini Converter SDI
Distribution to split the reference output from the studio unit into multiple signals.
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Studio Unit Connections
