CONCORD QV5200 Manual page 51

Chapter 7 Record Setup
7.2.1 Encode Resolution
One of the biggest contributors to how much data you use in a
recording is the resolution at which you record it. You may find,
especially if the camera is close to the subject such as a cash area
in a store or monitoring a front door, that you don't need all the
resolution you have available to be able to see the detail you
need. In this case a lot of space can be saved by reducing the
resolution being used or just using a lower resolution camera in
that area.
Resolution: You can select the resolution you wish to use from
the drop down menu under Resolution. This field will default to
the highest resolution possible for the camera that is connected
to that channel. However there is nothing stopping you from
setting this to the very lowest value that can be selected or
anything in between, it's up to you to decide what works for you.