Q-See QSD371614C4-250 - Manual (Page 13)

Operation Manual-4CH Duplex DVR
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option you can change the name of each channel if you want to.
6.2 Record
Use this option to enable recording on the
channel (1,2,3,4). Only selected channels will be
recorded no matter how many camera channels
are displayed on the screen.
A: [RECORD FRAMERATE]
Set the recording frame rate for each channel.
The higher the recording frame rate, the more
natural movement you will see while playback.
You can set each channels frame rate
independently.
For PAL video output format, system default
value is 12 frames per second with each channel,