SRD-1610DC 16CH H.264 Digital Video Recorder, 4 CH Audio, DVD Burner

While I'm a fan of Samsung DVR's this unit was certainly a disappointment. The unit is advertised as 120 fps at the lowest resolution. If you divide 120fps by 16 (the max number of cameras) you get 7.5 frame per seconds. 7.5 is the maximum number of frames per camera it can record--regardless of the number of cameras attached. I purchased this unit and attached 7 cameras with the understanding I would be able to record at 15 fps per camera (120/7). Not the case. The unused fps cannot be applied to the other cameras. 7.5 fps is all you are going to get, even if you have just one camera. Playback at 7.5 fps is jerky.

Samsung higher end records, such as the SRD-1650 or SRD-850 CAN allocate the unused fps to other channels