Atomos SUMO19 User Manual

*Subject to change without notice Atomos Sumo19 – User Manual Edition 1: September 2017 38
What is Pulldown?
Many professional and consumer
cameras available today do not send
true 1080p24, 1080p23.98, 1080p25,
1080p29.97 or 1080p30 signals down
their SDI or HDMI outputs.
Instead they send 1080i59.94 in NTSC
regions (eg USA, Japan), and 1080i50
in PAL regions (eg Europe)
In order to convert the signal from the internal recording format to
1080i5994 or 1080i50, they use a process called 3:2 or 2:2 pulldown.
Pulldown is only applicable to interlaced HD signals, not 4K
Camera Setting Pulldown Sumo19 Receives
1080p23.98 3:2 1080i59.94
1080p24 3:2 1080i60
1080p25 2:2 1080i50
1080p29.97 2:2 1080i59.94
1080p30 2:2 1080i60
You will, of course, want the Sumo19 to record the actual frame rate such
as 1080p23.98, not the1080i59.94 to disk. In many cases, it is not
possible for the Sumo19 to detect when pulldown has been applied to the
video, so you will have to set the correct mode of removal on the Sumo19
to match the setup of your camera.
With some cameras, the Sumo19 can detect and remove the pulldown
automatically, in which case the mode you expect (eg 1080p23.98) will
display on the Sumo19 and you will not have to do anything further.
If there is no input detected, then toggle the input by pressing the screen
until you see the input you wish to record.
Atomos is adding auto-detection support for more cameras, please
check for rmware updates regularly at www.atomos.com
1080p23.98 or 1080p24
If you have set 1080p23.98 or 1080p24 in your camera and your Sumo19
displays 1080i59.94 or 1080i60, then you can easily remove the pulldown
by following these steps:
• Select the Input Menu from the top Left and toggle the blue arrow
underneath Record repeatedly until you see 1080p23.98 (or 1080p24)
displayed. You may not get a green tick in this column immediately.
• Your Sumo19 needs to analyse the video for about 1 second, in order
to detect the pulldown sequence and remove it.
• If it is not automatically detected after 1 second, wave your hand from
side to side in front of the lens, or wave the camera from side to side
for a few seconds. The Sumo19 will detect the pulldown cadence
in the movement, and you will see a green tick along with the video
displayed on the screen.
•3:2pulldowndetectionisdifcult,ifnotimpossibletodetecton
completely still video. This is why you should wave your hand in front
of the lens.
3:2 pulldown detection is difcult, if not impossible to detect on
completely still video. This is why you should wave your hand in front
of the lens.
If you lose the input detection – for example you unplug the SDI cable
or go to Playback mode, you will need to wave your hand or the
camera again, when the signal is restored to the Sumo19.
Some cameras use a variant of pulldown removal, for example
Panasonic Advanced pulldown. The Sumo19 does NOT support this
format, and it will not be detected.
Standard Panasonic pulldown is supported, ensure in the Panasonic
camera settings that pulldown is not set to Advanced.
1080p25,1080p29.97or1080p30
For these modes, simply press the blue arrow underneath Record on
the input menu repeatedly until your 1080p desired format is displayed.
There is no need to wave your hand or the camera, as 2:2 pulldown
removal does not require moving video.
10. HD Pulldown

Atomos SUMO19 Specifications

General

Product color	Black
Housing material	Aluminum
Video capturing speed	120 fps
Maximum video resolution	3840 x 2160 pixels
DC voltage	16.8 V
Power consumption (typical)	75 W
Built-in display	Yes
Display diagonal	19 \
Display resolution	1920 x 1200 pixels
BNC input ports	1
HDD size	2.5 \

Weight and Dimensions

Depth	63 mm
Width	504 mm
Height	310 mm
Weight	5450 g