The majority of cameras (HD-SDI or HDMI) will output a 60i signal when set to Record/output 24P mode. This is perfectly normal, as not many cameras actually output 24P (Nikon and RED will). Most Sony, Panasonic and Canon cameras output a 60i signal which has the 24P signal embedded in it - this is known as 3:2 pulldown

How to set the Atomos Recorder:

The Atomos device will register this as a 59.97 input, but they can both record the 24P signal;

1. Press the blue arrow next to the video format repeatedly until you see 1080p23.98 or 1080p24 displayed. 
2. You will notice that the Mon and REC buttons are dimmed. 
3. The device needs to analyse the video for about 1 second in order to detect the pulldown sequence and remove it. 
4. Wave your hand from side-to-side in front of the lens, or wave the camera from side-to-side. 
5. The input video format will show as 1080p24 and the Mon and REC button will show in full colour. 
6. You can now start your recording

3:2 pulldown detection is difficult, 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 device.

For 1080p25, 1080p29.97 or 1080p30 modes, simply press the blue arrow repeatedly until the desired format is displayed. There is no need to wave your hand or the camera, as 2:2 pulldown removal (which is what this is) does not require moving video. Your device remembers whether you selected 3:2 or 2:2 pulldown removal, but if you change the format on your camera from 1080p24 to 1080i60 (just one example), you will need set to the input to match your camera setting again.